ext/Objects/abstract-test.cpp

// Copyright (c) Facebook, Inc. and its affiliates. (http://www.facebook.com)
#include <climits>
#include <cstring>

#include "Python.h"
#include "gtest/gtest.h"

#include "capi-fixture.h"
#include "capi-testing.h"

namespace py {
namespace testing {

using AbstractExtensionApiTest = ExtensionApi;

// Buffer Protocol

TEST_F(AbstractExtensionApiTest, PyBufferFillInfoSimpleFillsInfo) {
  Py_buffer buffer;
  char buf[13];
  PyObjectPtr pyobj(PyTuple_New(1));
  long prev_refcount = Py_REFCNT(pyobj);
  int readonly = 1;
  int result = PyBuffer_FillInfo(&buffer, pyobj, buf, sizeof(buf), readonly,
                                 PyBUF_SIMPLE);
  EXPECT_EQ(result, 0);
  EXPECT_EQ(Py_REFCNT(pyobj), prev_refcount + 1);
  EXPECT_EQ(buffer.obj, pyobj);
  EXPECT_EQ(buffer.buf, buf);
  EXPECT_EQ(buffer.len, (Py_ssize_t)sizeof(buf));
  EXPECT_EQ(buffer.readonly, 1);
  EXPECT_EQ(buffer.itemsize, 1);
  EXPECT_EQ(buffer.format, nullptr);
  EXPECT_EQ(buffer.ndim, 1);
  EXPECT_EQ(buffer.shape, nullptr);
  EXPECT_EQ(buffer.strides, nullptr);
  EXPECT_EQ(buffer.suboffsets, nullptr);
  EXPECT_EQ(buffer.internal, nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyBufferFillInfoWithWritableFormatNdStridesFillsInfo) {
  Py_buffer buffer;
  char buf[7];
  PyObjectPtr pyobj(PyTuple_New(1));
  long prev_refcount = Py_REFCNT(pyobj);
  int readonly = 0;
  int result = PyBuffer_FillInfo(
      &buffer, pyobj, buf, sizeof(buf), readonly,
      PyBUF_WRITABLE | PyBUF_FORMAT | PyBUF_ND | PyBUF_STRIDES);
  EXPECT_EQ(result, 0);
  EXPECT_EQ(Py_REFCNT(pyobj), prev_refcount + 1);
  EXPECT_EQ(buffer.obj, pyobj);
  EXPECT_EQ(buffer.buf, buf);
  EXPECT_EQ(buffer.len, (Py_ssize_t)sizeof(buf));
  EXPECT_EQ(buffer.readonly, 0);
  EXPECT_EQ(buffer.itemsize, 1);
  EXPECT_EQ(strcmp(buffer.format, "B"), 0);
  EXPECT_EQ(buffer.ndim, 1);
  EXPECT_EQ(buffer.shape, &buffer.len);
  EXPECT_EQ(buffer.strides, &buffer.itemsize);
  EXPECT_EQ(buffer.suboffsets, nullptr);
  EXPECT_EQ(buffer.internal, nullptr);
}

TEST_F(AbstractExtensionApiTest, PyBufferFillInfoWithNullptrRaisesBufferError) {
  int result = PyBuffer_FillInfo(nullptr, Py_None, nullptr, 0, 1, PyBUF_SIMPLE);
  EXPECT_EQ(result, -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_BufferError));
}

TEST_F(AbstractExtensionApiTest,
       PyBufferFillInfoWithWritableFlagAndReadonlyRaisesBufferError) {
  Py_buffer buffer;
  int result =
      PyBuffer_FillInfo(&buffer, Py_None, nullptr, 0, 1, PyBUF_WRITABLE);
  EXPECT_EQ(result, -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_BufferError));
}

TEST_F(AbstractExtensionApiTest,
       PyBufferIsContiguousWithInvalidOrderReturnsFalse) {
  Py_buffer buffer;
  char data[1];
  ASSERT_EQ(PyBuffer_FillInfo(&buffer, Py_None, data, /*len=*/1,
                              /*readonly=*/1, PyBUF_SIMPLE),
            0);
  EXPECT_FALSE(PyBuffer_IsContiguous(&buffer, '%'));
}

TEST_F(AbstractExtensionApiTest,
       PyBufferIsContiguousWithSubOffsetsReturnsFalse) {
  Py_buffer buffer;
  char data[1];
  ASSERT_EQ(PyBuffer_FillInfo(&buffer, Py_None, data, /*len=*/1,
                              /*readonly=*/1, PyBUF_SIMPLE),
            0);
  static Py_ssize_t suboffsets[] = {13};
  buffer.suboffsets = suboffsets;
  EXPECT_FALSE(PyBuffer_IsContiguous(&buffer, 'C'));
  EXPECT_FALSE(PyBuffer_IsContiguous(&buffer, 'F'));
  EXPECT_FALSE(PyBuffer_IsContiguous(&buffer, 'A'));
}

TEST_F(AbstractExtensionApiTest, PyBufferIsContiguousReturnsTrue) {
  Py_buffer buffer;
  char data[1];
  ASSERT_EQ(PyBuffer_FillInfo(&buffer, Py_None, data, /*len=*/1,
                              /*readonly=*/1, PyBUF_SIMPLE),
            0);
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'C'));
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'F'));
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'A'));
}

TEST_F(AbstractExtensionApiTest, PyBufferIsContiguousWithRowMajorBuffer) {
  Py_buffer buffer;
  char data[300];
  ASSERT_EQ(PyBuffer_FillInfo(&buffer, Py_None, data, /*len=*/100,
                              /*readonly=*/1, PyBUF_STRIDES),
            0);
  buffer.itemsize = 2;
  buffer.format = const_cast<char*>("h");
  buffer.ndim = 3;
  Py_ssize_t shape[3] = {10, 3, 5};
  buffer.shape = shape;
  Py_ssize_t strides[3] = {30, 10, 2};
  buffer.strides = strides;
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'C'));
  EXPECT_FALSE(PyBuffer_IsContiguous(&buffer, 'F'));
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'A'));
}

TEST_F(AbstractExtensionApiTest, PyBufferIsContiguousWithColumnMajorBuffer) {
  Py_buffer buffer;
  char data[420];
  ASSERT_EQ(PyBuffer_FillInfo(&buffer, Py_None, data, /*len=*/100,
                              /*readonly=*/1, PyBUF_STRIDES),
            0);
  buffer.itemsize = 4;
  buffer.format = const_cast<char*>("L");
  buffer.ndim = 3;
  Py_ssize_t shape[3] = {7, 3, 5};
  buffer.shape = shape;
  Py_ssize_t strides[3] = {4, 28, 84};
  buffer.strides = strides;
  EXPECT_FALSE(PyBuffer_IsContiguous(&buffer, 'C'));
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'F'));
  EXPECT_TRUE(PyBuffer_IsContiguous(&buffer, 'A'));
}

TEST_F(AbstractExtensionApiTest, PyEvalCallFunctionCalls) {
  PyRun_SimpleString(R"(
def func(*args):
  return f"{args!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr result(PyEval_CallFunction(func, "(iI)s#i", 3, 7, "aaaa", 3, 99));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "((3, 7), 'aaa', 99)"));
}

TEST_F(AbstractExtensionApiTest, PyEvalCallMethodCalls) {
  PyRun_SimpleString(R"(
class C:
  x = 42
  def func(self, *args):
    return f"{self.x}{args!r}"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyEval_CallMethod(c, "func", "s#(i)", "ccc", 1, 7));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "42('c', (7,))"));
}

// PyIndex_Check

TEST_F(AbstractExtensionApiTest, PyIndexCheckWithIntReturnsTrue) {
  PyObjectPtr int_num(PyLong_FromLong(1));
  EXPECT_TRUE(PyIndex_Check(int_num.get()));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyIndexCheckWithFloatReturnsFalse) {
  PyObjectPtr float_num(PyFloat_FromDouble(1.1));
  EXPECT_FALSE(PyIndex_Check(float_num.get()));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyIndexCheckWithUncallableDunderIndexReturnsTrue) {
  PyRun_SimpleString(R"(
class C:
  __index__ = None
idx = C()
  )");
  PyObjectPtr idx(mainModuleGet("idx"));
  EXPECT_TRUE(PyIndex_Check(idx.get()));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyIndexCheckWithDunderIndexReturnsTrue) {
  PyRun_SimpleString(R"(
class C:
  def __index__(self):
    return 1
idx = C()
  )");
  PyObjectPtr idx(mainModuleGet("idx"));
  EXPECT_TRUE(PyIndex_Check(idx.get()));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyIndexCheckWithDunderIndexDescriptorThatRaisesReturnsTrue) {
  PyRun_SimpleString(R"(
class Desc:
  def __get__(self, obj, type):
    raise UserWarning("foo")
class C:
  __index__ = Desc()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyIndex_Check(c.get()), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

// PyIter_Next

TEST_F(AbstractExtensionApiTest, PyIterNextReturnsNext) {
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));
  PyObjectPtr three(PyLong_FromLong(3));
  PyObjectPtr tuple(PyTuple_Pack(3, one.get(), two.get(), three.get()));
  PyObjectPtr iter(PyObject_GetIter(tuple));
  ASSERT_NE(iter, nullptr);
  PyObjectPtr next(PyIter_Next(iter));
  ASSERT_NE(next, nullptr);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(next), 1);
  next = PyIter_Next(iter);
  ASSERT_NE(next, nullptr);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(next), 2);
  next = PyIter_Next(iter);
  ASSERT_NE(next, nullptr);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(next), 3);
  next = PyIter_Next(iter);
  ASSERT_EQ(next, nullptr);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyIterNextOnNonIterRaises) {
  ASSERT_EQ(PyObject_GetIter(Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyIterNextPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __iter__(self):
    return self
  def __next__(self):
    raise ValueError("hi")

c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr iter(PyObject_GetIter(c));
  ASSERT_NE(iter, nullptr);
  PyObjectPtr next(PyIter_Next(iter));
  ASSERT_EQ(next, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

// Mapping Protocol

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithoutGetItemReturnsFalse) {
  PyRun_SimpleString(R"(
class ClassWithoutDunderGetItem: pass

obj = ClassWithoutDunderGetItem()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_FALSE(PyMapping_Check(obj));
}

TEST_F(AbstractExtensionApiTest,
       PyMappingCheckWithoutGetItemOnClassReturnsFalse) {
  PyRun_SimpleString(R"(
class ClassWithoutDunderGetItem: pass

obj = ClassWithoutDunderGetItem()
obj.__getitem__ = lambda self, key: 1
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_FALSE(PyMapping_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithNumericReturnsFalse) {
  PyObjectPtr num(PyLong_FromLong(4));
  EXPECT_FALSE(PyMapping_Check(num));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithSetReturnsFalse) {
  PyObjectPtr set(PySet_New(nullptr));
  EXPECT_FALSE(PyMapping_Check(set));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithBooleanReturnsFalse) {
  EXPECT_FALSE(PyMapping_Check(Py_False));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithGetItemMethodReturnsTrue) {
  PyRun_SimpleString(R"(
class ClassWithDunderGetItemMethod:
  def __getitem__(self, key):
    return None

obj = ClassWithDunderGetItemMethod()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_TRUE(PyMapping_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithGetItemAttrReturnsTrue) {
  PyRun_SimpleString(R"(
class ClassWithDunderGetItemAttr:
  __getitem__ = 42

obj = ClassWithDunderGetItemAttr()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_TRUE(PyMapping_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithStringReturnsTrue) {
  PyObjectPtr str(PyUnicode_FromString("foo"));
  EXPECT_TRUE(PyMapping_Check(str));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithListReturnsTrue) {
  PyObjectPtr list(PyList_New(3));
  EXPECT_TRUE(PyMapping_Check(list));
}

TEST_F(AbstractExtensionApiTest, PyMappingCheckWithDictReturnsTrue) {
  PyObjectPtr dict(PyDict_New());
  EXPECT_TRUE(PyMapping_Check(dict));
}

TEST_F(AbstractExtensionApiTest, PyMappingLengthOnNullRaisesSystemError) {
  EXPECT_EQ(PyMapping_Length(nullptr), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyMappingLengthWithNonMappingReturnsLen) {
  PyRun_SimpleString(R"(
class Foo:
  def __len__(self):
    return 1
obj = Foo()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyMapping_Length(obj), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyMappingSizeOnNullRaisesSystemError) {
  EXPECT_EQ(PyMapping_Size(nullptr), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

// Number Protocol

TEST_F(AbstractExtensionApiTest, PyNumberAbsoluteWithNullRaisesSystemError) {
  ASSERT_EQ(PyNumber_Absolute(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PyNumberAbsoluteWithNoDunderAbsRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyNumber_Absolute(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberAbsoluteCallsDunderAbs) {
  PyObjectPtr negative(PyLong_FromLong(-10));
  PyObjectPtr positive(PyLong_FromLong(10));
  PyObjectPtr result(PyNumber_Absolute(negative));
  EXPECT_EQ(result, positive);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberAddWithNoDunderAddRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyNumber_Add(c, c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberAddCallsDunderAdd) {
  PyRun_SimpleString(R"(
class ClassWithDunderAdd:
  def __add__(self, other):
    return "hello";

x = ClassWithDunderAdd()
  )");
  PyObjectPtr x(mainModuleGet("x"));
  PyObjectPtr y(PyLong_FromLong(7));
  PyObjectPtr result(PyNumber_Add(x, y));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "hello"));
}

TEST_F(AbstractExtensionApiTest, PyNumberAddWithIntsReturnsSum) {
  PyObjectPtr x(PyLong_FromLong(7));
  PyObjectPtr y(PyLong_FromLong(10));
  PyObjectPtr result(PyNumber_Add(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 17);
}

TEST_F(AbstractExtensionApiTest, PyNumberAddWithUnicodeReturnsConcat) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyUnicode_FromString("bar"));
  PyObjectPtr result(PyNumber_Add(x, y));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "foobar"));
}

TEST_F(AbstractExtensionApiTest, PyNumberAndWithNonIntRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_And(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberAndWithIntsReturnsBitwiseAnd) {
  PyObjectPtr x(PyLong_FromLong(5));  // 0b0101
  PyObjectPtr y(PyLong_FromLong(3));  // 0b0011
  PyObjectPtr result(PyNumber_And(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);  // 0b0001
}

TEST_F(AbstractExtensionApiTest, PyNumberAsSsizeTWithNullRaisesSystemError) {
  ASSERT_EQ(PyNumber_AsSsize_t(nullptr, PyExc_TypeError), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberAsSsizeTWithStringRaisesTypeError) {
  PyObjectPtr str(PyUnicode_FromString("foo"));
  ASSERT_EQ(PyNumber_AsSsize_t(str, nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberAsSsizeTWithIntReturnsInt) {
  PyObjectPtr num(PyLong_FromLong(10));
  Py_ssize_t result = PyNumber_AsSsize_t(num, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, 10);
}

TEST_F(AbstractExtensionApiTest, PyNumberAsSsizeTWithIntSubclassReturnsInt) {
  PyRun_SimpleString(R"(
class C(int):
  def __index__(self): return 10
obj = C(42);
)");
  PyObjectPtr obj(mainModuleGet("obj"));
  Py_ssize_t result = PyNumber_AsSsize_t(obj, nullptr);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, 42);
}

TEST_F(AbstractExtensionApiTest, PyNumberAsSsizeTWithDunderIndexReturnsInt) {
  PyRun_SimpleString(R"(
class C:
  def __index__(self): return 42
obj = C();
)");
  PyObjectPtr obj(mainModuleGet("obj"));
  Py_ssize_t result = PyNumber_AsSsize_t(obj, nullptr);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, 42);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberAsSsizeTWithNegativeOneReturnsNegativeOne) {
  PyObjectPtr num(PyLong_FromLong(-1));
  Py_ssize_t result = PyNumber_AsSsize_t(num, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, -1);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberAsSsizeTWithOverflowAndNullClearsError) {
  const unsigned char bytes[] = {0x01, 0x00, 0x00, 0x00, 0x00,
                                 0x00, 0x00, 0x00, 0x00};
  PyObjectPtr num(_PyLong_FromByteArray(bytes, sizeof(bytes), false, true));
  Py_ssize_t result = PyNumber_AsSsize_t(num, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, 0x7fffffffffffffff);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberAsSsizeTWithUnderflowAndNullClearsError) {
  const unsigned char bytes[] = {0xff, 0x00, 0x00, 0x00, 0x00,
                                 0x00, 0x00, 0x00, 0x00};
  PyObjectPtr num(_PyLong_FromByteArray(bytes, sizeof(bytes), false, true));
  Py_ssize_t result = PyNumber_AsSsize_t(num, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, INT64_MIN);
}

TEST_F(AbstractExtensionApiTest, PyNumberAsSsizeTWithOverflowSetsGivenError) {
  const unsigned char bytes[] = {0x01, 0x00, 0x00, 0x00, 0x00,
                                 0x00, 0x00, 0x00, 0x00};
  PyObjectPtr num(_PyLong_FromByteArray(bytes, sizeof(bytes), false, true));
  ASSERT_EQ(PyNumber_AsSsize_t(num, PyExc_ModuleNotFoundError), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ModuleNotFoundError));
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithFloatReturnsTrue) {
  PyObjectPtr float_num(PyFloat_FromDouble(1.1));
  EXPECT_EQ(PyNumber_Check(float_num), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithIntReturnsTrue) {
  PyObjectPtr int_num(PyLong_FromLong(1));
  EXPECT_EQ(PyNumber_Check(int_num), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithFloatSubclassReturnsTrue) {
  PyRun_SimpleString(R"(
class SubFloat(float):
  pass
sub = SubFloat()
  )");
  PyObjectPtr sub(mainModuleGet("sub"));
  EXPECT_EQ(PyNumber_Check(sub), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithDunderIntClassReturnsTrue) {
  PyRun_SimpleString(R"(
class DunderIntClass():
  def __int__(self):
    return 5
i = DunderIntClass()
  )");
  PyObjectPtr i(mainModuleGet("i"));
  EXPECT_EQ(PyNumber_Check(i), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithDunderFloatClassReturnsTrue) {
  PyRun_SimpleString(R"(
class DunderFloatClass():
  def __float__(self):
    return 5.0
f = DunderFloatClass()
  )");
  PyObjectPtr f(mainModuleGet("f"));
  EXPECT_EQ(PyNumber_Check(f), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithNonNumberReturnsFalse) {
  PyObjectPtr str(PyUnicode_FromString(""));
  EXPECT_EQ(PyNumber_Check(str), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberCheckWithDunderIntDescriptorThatRaisesReturnsTrue) {
  PyRun_SimpleString(R"(
class Desc:
  def __get__(self, obj, type):
    raise UserWarning("foo")
class C:
  __int__ = Desc()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyNumber_Check(c), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberCheckWithDunderFloatDescriptorThatRaisesReturnsTrue) {
  PyRun_SimpleString(R"(
class Desc:
  def __get__(self, obj, type):
    raise UserWarning("foo")
class C:
  __float__ = Desc()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyNumber_Check(c), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberCheckWithNullReturnsFalse) {
  EXPECT_EQ(PyNumber_Check(nullptr), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberFloatWithNullRaisesSystemError) {
  EXPECT_EQ(PyNumber_Float(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberFloatWithStringReturnsFloat) {
  PyObjectPtr str(PyUnicode_FromString("4.2"));
  PyObjectPtr flt(PyNumber_Float(str));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyFloat_CheckExact(flt));
  EXPECT_EQ(PyFloat_AsDouble(flt), 4.2);
}

TEST_F(AbstractExtensionApiTest, PyNumberFloatWithIntReturnsFloat) {
  PyObjectPtr num(PyLong_FromLong(42));
  PyObjectPtr flt(PyNumber_Float(num));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyFloat_CheckExact(flt));
  EXPECT_EQ(PyFloat_AsDouble(flt), 42.0);
}

TEST_F(AbstractExtensionApiTest, PyNumberFloatWithFloatReturnsSameFloat) {
  PyObjectPtr num(PyFloat_FromDouble(4.2));
  Py_ssize_t refcnt = Py_REFCNT(num);
  PyObjectPtr flt(PyNumber_Float(num));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(num, flt);
  EXPECT_EQ(Py_REFCNT(num), refcnt + 1);
}

TEST_F(AbstractExtensionApiTest, PyNumberFloatWithFloatSubclassReturnsFloat) {
  PyRun_SimpleString(R"(
class C(float):
  pass
x = C(4.2)
)");
  PyObjectPtr x(mainModuleGet("x"));
  PyObjectPtr flt(PyNumber_Float(x));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyFloat_CheckExact(flt));
  EXPECT_EQ(PyFloat_AsDouble(flt), 4.2);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberFloatWithDescriptorThatRaisesPropagatesException) {
  PyRun_SimpleString(R"(
class Desc:
  def __get__(self, obj, type):
    raise UserWarning("foo")
class C:
  __float__ = Desc()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyNumber_Float(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyNumberFloorDivideWithNonIntRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_FloorDivide(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberFloorDivideWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr y(PyLong_FromLong(5));
  PyObjectPtr result(PyNumber_FloorDivide(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 8);
}

TEST_F(AbstractExtensionApiTest, PyNumberIndexOnIntReturnsSelf) {
  PyObjectPtr pylong(PyLong_FromLong(666));
  PyObjectPtr index(PyNumber_Index(pylong));
  EXPECT_EQ(index, pylong);
}

TEST_F(AbstractExtensionApiTest, PyNumberIndexOnIntSubclassReturnsSelf) {
  PyRun_SimpleString(R"(
class C(int): pass
obj = C(42);
)");
  PyObjectPtr obj(mainModuleGet("obj"));
  PyObjectPtr index(PyNumber_Index(obj));
  EXPECT_EQ(index, obj);
}

TEST_F(AbstractExtensionApiTest, PyNumberIndexCallsDunderIndex) {
  PyRun_SimpleString(R"(
class IntLikeClass:
  def __index__(self):
    return 42;

i = IntLikeClass();
  )");
  PyObjectPtr i(mainModuleGet("i"));
  PyObjectPtr index(PyNumber_Index(i));
  ASSERT_TRUE(PyLong_CheckExact(index));
  EXPECT_EQ(PyLong_AsLong(index), 42);
}

TEST_F(AbstractExtensionApiTest, PyNumberIndexOnNullRaisesSystemError) {
  ASSERT_EQ(PyNumber_Index(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberIndexOnNonIntRaisesTypeError) {
  PyObjectPtr str(PyUnicode_FromString("not an int"));
  ASSERT_EQ(PyNumber_Index(str), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyNumberIndexWithMistypedDunderIndexRaisesTypeError) {
  PyRun_SimpleString(R"(
class IntLikeClass:
  def __index__(self):
    return "not an int";

i = IntLikeClass();
  )");
  PyObjectPtr i(mainModuleGet("i"));
  ASSERT_EQ(PyNumber_Index(i), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceAddWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceAdd(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceAddWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(4));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_InPlaceAdd(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 6);
  EXPECT_EQ(PyLong_AsLong(x), 4);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceAndWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceAnd(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceAndWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(5));  // 0b0101
  PyObjectPtr y(PyLong_FromLong(3));  // 0b0011
  PyObjectPtr result(PyNumber_InPlaceAnd(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);  // 0b0001
  EXPECT_EQ(PyLong_AsLong(x), 5);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceFloorDivideWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceFloorDivide(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceFloorDivideWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr y(PyLong_FromLong(5));
  PyObjectPtr result(PyNumber_InPlaceFloorDivide(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 8);
  EXPECT_EQ(PyLong_AsLong(x), 42);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceLshiftWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceLshift(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceLshiftIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(5));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr result(PyNumber_InPlaceLshift(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 40);
  EXPECT_EQ(PyLong_AsLong(x), 5);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceMatrixMultiplyWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceMatrixMultiply(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceMatrixMultiplyCallsDunderImatmul) {
  PyRun_SimpleString(R"(
class C:
  def __init__(self):
    self.called = False
  def __imatmul__(self, other):
    self.called = True
    return 1
x = C()
)");
  PyObjectPtr x(mainModuleGet("x"));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr called1(PyObject_GetAttrString(x, "called"));
  EXPECT_EQ(called1, Py_False);
  PyObjectPtr result(PyNumber_InPlaceMatrixMultiply(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);
  PyObjectPtr called2(PyObject_GetAttrString(x, "called"));
  EXPECT_EQ(called2, Py_True);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceMultiplyWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceMultiply(x, Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceMultiplyWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(3));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_InPlaceMultiply(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 6);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceOrWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceOr(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceOrWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(5));  // 0b0101
  PyObjectPtr y(PyLong_FromLong(3));  // 0b0011
  PyObjectPtr result(PyNumber_InPlaceOr(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 7);  // 0b0111
  EXPECT_EQ(PyLong_AsLong(x), 5);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlacePowerWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlacePower(x, y, Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlacePowerCallsDunderIpow) {
  PyRun_SimpleString(R"(
class C:
  def __init__(self):
    self.called = False
  def __ipow__(self, other):
    self.called = True
    return 1
x = C()
)");
  PyObjectPtr x(mainModuleGet("x"));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr called1(PyObject_GetAttrString(x, "called"));
  EXPECT_EQ(called1, Py_False);
  PyObjectPtr result(PyNumber_InPlacePower(x, y, Py_None));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);
  PyObjectPtr called2(PyObject_GetAttrString(x, "called"));
  EXPECT_EQ(called2, Py_True);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceRemainderWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyList_New(0));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceRemainder(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceRemainderWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr y(PyLong_FromLong(5));
  PyObjectPtr result(PyNumber_InPlaceRemainder(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 2);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceRshiftWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceRshift(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceRshiftIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr result(PyNumber_InPlaceRshift(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 5);
  EXPECT_EQ(PyLong_AsLong(x), 42);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceSubtractWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceSubtract(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceSubtractIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(5));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr result(PyNumber_InPlaceSubtract(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 2);
  EXPECT_EQ(PyLong_AsLong(x), 5);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceTrueDivideWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceTrueDivide(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceTrueDivideWithFloatsReturnsFloat) {
  PyObjectPtr x(PyLong_FromLong(42.0));
  PyObjectPtr y(PyLong_FromLong(5));
  PyObjectPtr result(PyNumber_InPlaceTrueDivide(x, y));
  ASSERT_TRUE(PyFloat_CheckExact(result));
  EXPECT_EQ(PyFloat_AsDouble(result), 8.4);
  EXPECT_EQ(PyFloat_AsDouble(x), 42.0);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInPlaceXorWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_InPlaceXor(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInPlaceXorWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(5));  // 0b0101
  PyObjectPtr y(PyLong_FromLong(3));  // 0b0011
  PyObjectPtr result(PyNumber_InPlaceXor(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 6);  // 0b0110
  EXPECT_EQ(PyLong_AsLong(x), 5);
}

TEST_F(AbstractExtensionApiTest, PyNumberInvertWithIntReturnsInt) {
  PyObjectPtr num(PyLong_FromLong(7));
  PyObjectPtr result(PyNumber_Invert(num));
  EXPECT_EQ(PyLong_AsLong(result), -8);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberInvertWithCustomClassCallsDunderInvert) {
  PyRun_SimpleString(R"(
class C:
  def __invert__(self):
    return "custom invert"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Invert(c));
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "custom invert"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberInvertWithNullRaisesSystemError) {
  ASSERT_EQ(PyNumber_Invert(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInvertWithNonNumberRaisesTypeError) {
  ASSERT_EQ(PyNumber_Positive(Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberInvertPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __invert__(self):
    raise UserWarning()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Invert(c));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyNumberLongWithNullRaisesSystemError) {
  EXPECT_EQ(PyNumber_Long(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberLongWithIntReturnsInt) {
  PyObjectPtr intobj(PyLong_FromLong(PY_SSIZE_T_MAX));
  Py_ssize_t refcnt = Py_REFCNT(intobj);
  PyObjectPtr result(PyNumber_Long(intobj));
  ASSERT_NE(result, nullptr);
  EXPECT_EQ(result, intobj);
  EXPECT_EQ(Py_REFCNT(result), refcnt + 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberLongDunderLongReturnsNonIntRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  def __int__(self):
    return "foo"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyNumber_Long(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberLongCallsDunderTrunc) {
  PyRun_SimpleString(R"(
class C:
  def __trunc__(self):
    return 7
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Long(c));
  ASSERT_NE(result, nullptr);
  EXPECT_EQ(PyLong_AsLong(result), 7);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberLongCallsDunderTruncAndDunderInt) {
  PyRun_SimpleString(R"(
class D:
  def __int__(self):
    return 8

class C:
  def __trunc__(self):
    return D()

c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Long(c));
  ASSERT_NE(result, nullptr);
  EXPECT_EQ(PyLong_AsLong(result), 8);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberLongWithStringReturnsInt) {
  PyObjectPtr str(PyUnicode_FromString("7"));
  PyObjectPtr result(PyNumber_Long(str));
  ASSERT_NE(result, nullptr);
  EXPECT_EQ(PyLong_AsLong(result), 7);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberLongWithUnsupportedTypeRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyNumber_Long(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberLshiftWithNonIntSelfRaisesTypeError) {
  PyObjectPtr x(PyFloat_FromDouble(5.0));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_Lshift(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberLshiftWithNonIntOtherRaisesTypeError) {
  PyObjectPtr x(PyLong_FromLong(5));
  PyObjectPtr y(PyFloat_FromDouble(2.0));
  ASSERT_EQ(PyNumber_Lshift(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberLshiftWithIntsShiftBitsLeft) {
  PyObjectPtr x(PyLong_FromLong(0x13));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_Lshift(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 0x4C);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberMatrixMultiplyWithoutDunderMatmulRaisesTypeError) {
  PyObjectPtr x(PyFloat_FromDouble(5.0));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_MatrixMultiply(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberMatrixMultiplyCallsDunderMatmul) {
  PyRun_SimpleString(R"(
class C:
  def __matmul__(self, other):
    return other
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr result(PyNumber_MatrixMultiply(c, x));
  ASSERT_TRUE(PyLong_CheckExact(result));
  ASSERT_EQ(PyLong_AsLong(result), 42);
}

TEST_F(AbstractExtensionApiTest, PyNumberMultiplyWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(5));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_Multiply(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 10);
}

TEST_F(AbstractExtensionApiTest, PyNumberMultiplyWithFloatReturnsFloat) {
  PyObjectPtr x(PyFloat_FromDouble(5.0));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_Multiply(x, y));
  ASSERT_TRUE(PyFloat_CheckExact(result));
  ASSERT_EQ(PyFloat_AsDouble(result), 10.0);
}

TEST_F(AbstractExtensionApiTest, PyNumberMultiplyCallsDunderMul) {
  PyRun_SimpleString(R"(
class C:
  def __mul__(self, other):
    return other
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr result(PyNumber_Multiply(c, x));
  ASSERT_TRUE(PyLong_CheckExact(result));
  ASSERT_EQ(PyLong_AsLong(result), 42);
}

TEST_F(AbstractExtensionApiTest, PyNumberNegativeWithIntReturnsInt) {
  PyObjectPtr num(PyLong_FromLong(-22));
  PyObjectPtr result(PyNumber_Negative(num));
  EXPECT_EQ(PyLong_AsLong(result), 22);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberNegativeWithCustomClassCallsDunderNeg) {
  PyRun_SimpleString(R"(
class C:
  def __neg__(self):
    return "custom neg"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Negative(c));
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "custom neg"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberNegativeWithNullRaisesSystemError) {
  EXPECT_EQ(PyNumber_Negative(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberNegativeWithNonNumberRaisesTypeError) {
  EXPECT_EQ(PyNumber_Negative(Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberNegativePropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __neg__(self):
    raise UserWarning()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Negative(c));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyNumberOrWithNonIntRaisesTypeError) {
  PyObjectPtr x(PyLong_FromLong(10));
  PyObjectPtr y(PyFloat_FromDouble(2.0));
  ASSERT_EQ(PyNumber_Or(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberOrWithIntsReturnsBitwiseOr) {
  PyObjectPtr x(PyLong_FromLong(5));  // 0b0101
  PyObjectPtr y(PyLong_FromLong(3));  // 0b0011
  PyObjectPtr result(PyNumber_Or(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 7);  // 0b0111
}

TEST_F(AbstractExtensionApiTest, PyNumberPositiveWithIntReturnsInt) {
  PyObjectPtr num(PyLong_FromLong(-13));
  PyObjectPtr result(PyNumber_Positive(num));
  EXPECT_EQ(PyLong_AsLong(result), -13);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberPositiveWithCustomClassCallsDunderPos) {
  PyRun_SimpleString(R"(
class C:
  def __pos__(self):
    return "custom pos"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Positive(c));
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "custom pos"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberPositiveWithNullRaisesSystemError) {
  ASSERT_EQ(PyNumber_Positive(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyNumberPositiveWithNonNumberRaisesTypeError) {
  ASSERT_EQ(PyNumber_Positive(Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberPositivePropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __pos__(self):
    raise UserWarning()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_Positive(c));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyNumberPowerWithNonNumberRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_Power(x, y, Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberPowerWithFloatReturnsFloat) {
  PyObjectPtr x(PyFloat_FromDouble(2.0));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr result(PyNumber_Power(x, y, Py_None));
  ASSERT_TRUE(PyFloat_CheckExact(result));
  EXPECT_EQ(PyFloat_AsDouble(result), 8.0);
}

TEST_F(AbstractExtensionApiTest, PyNumberRemainderWithNonIntRaisesTypeError) {
  PyObjectPtr x(PyLong_FromLong(10));
  ASSERT_EQ(PyNumber_Remainder(x, Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberRemainderWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(10));
  PyObjectPtr y(PyLong_FromLong(3));
  PyObjectPtr result(PyNumber_Remainder(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);
}

TEST_F(AbstractExtensionApiTest, PyNumberRshiftWithNonIntSelfRaisesTypeError) {
  PyObjectPtr x(PyFloat_FromDouble(5.0));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_Rshift(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberRshiftWithNonIntOtherRaisesTypeError) {
  PyObjectPtr x(PyLong_FromLong(5));
  PyObjectPtr y(PyFloat_FromDouble(2.0));
  ASSERT_EQ(PyNumber_Rshift(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberRshiftWithIntsShiftBitsRight) {
  PyObjectPtr x(PyLong_FromLong(0x4C));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_Rshift(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 0x13);
}

TEST_F(AbstractExtensionApiTest,
       PyNumberSubtractWithoutDunderSubtractRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_Subtract(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberSubtractCallsDunderSub) {
  PyRun_SimpleString(R"(
class C:
  def __sub__(self, other):
    return other
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr result(PyNumber_Subtract(c, x));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 42);
}

TEST_F(AbstractExtensionApiTest, PyNumberSubtractWithFloatReturnsFloat) {
  PyObjectPtr x(PyLong_FromLong(10));
  PyObjectPtr y(PyFloat_FromDouble(2.0));
  PyObjectPtr result(PyNumber_Subtract(x, y));
  ASSERT_TRUE(PyFloat_CheckExact(result));
  EXPECT_EQ(PyFloat_AsDouble(result), 8.0);

  PyObjectPtr result2(PyNumber_Subtract(y, x));
  ASSERT_TRUE(PyFloat_CheckExact(result2));
  EXPECT_EQ(PyFloat_AsDouble(result2), -8.0);
}

TEST_F(AbstractExtensionApiTest, PyNumberSubtractWithIntsReturnsInt) {
  PyObjectPtr x(PyLong_FromLong(10));
  PyObjectPtr y(PyLong_FromLong(2));
  PyObjectPtr result(PyNumber_Subtract(x, y));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 8);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseWithBinaryFormatsAsBinary) {
  PyObjectPtr x(PyLong_FromLong(10));  // 0b1010
  PyObjectPtr result(PyNumber_ToBase(x, 2));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "0b1010"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseWithOctalFormatsAsOctal) {
  PyObjectPtr x(PyLong_FromLong(520));  // 0o1010
  PyObjectPtr result(PyNumber_ToBase(x, 8));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "0o1010"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseWithDecimalFormatsAsDecimal) {
  PyObjectPtr x(PyLong_FromLong(12345));
  PyObjectPtr result(PyNumber_ToBase(x, 10));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "12345"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseWithHexFormatsAsHex) {
  PyObjectPtr x(PyLong_FromLong(0xdeadbeef));
  PyObjectPtr result(PyNumber_ToBase(x, 16));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "0xdeadbeef"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseSupportsIndex) {
  PyRun_SimpleString(R"(
class C:
  def __index__(self):
    return 42
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_ToBase(c, 8));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "0o52"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBasePropagatesIndexException) {
  PyRun_SimpleString(R"(
class C:
  def __index__(self):
    raise ValueError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_ToBase(c, 8));
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
  EXPECT_EQ(result, nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseSupportsIntSubclass) {
  PyRun_SimpleString(R"(
class C(int):
  pass
c = C(33)
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyNumber_ToBase(c, 16));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyUnicode_CompareWithASCIIString(result, "0x21"), 0);
}

TEST_F(AbstractExtensionApiTest, PyNumberToBaseWithInvalidBaseRaises) {
  PyObjectPtr x(PyLong_FromLong(0xdeadbeef));
  PyObjectPtr result(PyNumber_ToBase(x, 15));
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
  EXPECT_EQ(result, nullptr);
}

TEST_F(AbstractExtensionApiTest, PyNumberTrueDivideWithNonIntRaisesTypeError) {
  PyObjectPtr x(PyUnicode_FromString("foo"));
  PyObjectPtr y(PyLong_FromLong(2));
  ASSERT_EQ(PyNumber_TrueDivide(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberTrueDivideCallsDunderTruediv) {
  PyRun_SimpleString(R"(
class C:
  def __truediv__(self, other):
    return other
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr result(PyNumber_TrueDivide(c, x));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 42);
}

TEST_F(AbstractExtensionApiTest, PyNumberTrueDivideWithIntsReturnsFloat) {
  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr y(PyLong_FromLong(5));
  PyObjectPtr result(PyNumber_TrueDivide(x, y));
  ASSERT_TRUE(PyFloat_CheckExact(result));
  EXPECT_EQ(PyFloat_AsDouble(result), 8.4);
}

TEST_F(AbstractExtensionApiTest, PyNumberTrueDivideWithFloatReturnsFloat) {
  PyObjectPtr a(PyFloat_FromDouble(42.0));
  PyObjectPtr b(PyLong_FromLong(5));
  PyObjectPtr result1(PyNumber_TrueDivide(a, b));
  ASSERT_TRUE(PyFloat_CheckExact(result1));
  EXPECT_EQ(PyFloat_AsDouble(result1), 8.4);

  PyObjectPtr x(PyLong_FromLong(42));
  PyObjectPtr y(PyFloat_FromDouble(5.0));
  PyObjectPtr result2(PyNumber_TrueDivide(x, y));
  ASSERT_TRUE(PyFloat_CheckExact(result2));
  EXPECT_EQ(PyFloat_AsDouble(result2), 8.4);
}

TEST_F(AbstractExtensionApiTest, PyNumberXorWithNonIntRaisesTypeError) {
  PyObjectPtr x(PyFloat_FromDouble(5.0));
  PyObjectPtr y(PyLong_FromLong(3));
  ASSERT_EQ(PyNumber_Xor(x, y), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyNumberXorWithIntsReturnsBitwiseOr) {
  PyObjectPtr v(PyLong_FromLong(5));  // 0b0101
  PyObjectPtr w(PyLong_FromLong(3));  // 0b0011
  PyObjectPtr result(PyNumber_Xor(v, w));
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 6);  // 0b0110
}

// Object Protocol

TEST_F(AbstractExtensionApiTest, PyObjectCallWithArgsCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr tup0(PyUnicode_FromString("one"));
  PyObjectPtr tup1(PyLong_FromLong(2));
  PyObjectPtr tup2(PyLong_FromLong(3));
  PyObjectPtr args(PyTuple_Pack(3, tup0.get(), tup1.get(), tup2.get()));
  PyObjectPtr result(PyObject_Call(func, args, nullptr));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "('one', 2, 3){}"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallWithArgsAndKwargsCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr tup0(PyLong_FromLong(1));
  PyObjectPtr tup1(PyLong_FromLong(2));
  PyObjectPtr tup2(PyUnicode_FromString("three"));
  PyObjectPtr args(PyTuple_Pack(3, tup0.get(), tup1.get(), tup2.get()));
  PyObjectPtr kwargs(PyDict_New());
  PyObjectPtr kwarg_name(PyUnicode_FromString("kwarg"));
  PyObjectPtr kwarg_val(PyLong_FromLong(4));
  PyDict_SetItem(kwargs, kwarg_name, kwarg_val);
  PyObjectPtr result(PyObject_Call(func, args, kwargs));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(1, 2, 'three'){'kwarg': 4}"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallPropagatesException) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  raise UserWarning()
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr args(PyTuple_New(0));
  PyObjectPtr result(PyObject_Call(func, args, nullptr));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallWithCallableOfNativeType) {
  ternaryfunc meth = [](PyObject*, PyObject*, PyObject*) {
    return PyUnicode_FromString("from_tp_call");
  };
  static const PyType_Slot slots[] = {
      {Py_tp_call, reinterpret_cast<void*>(meth)},
      {0, nullptr},
  };
  static PyType_Spec spec = {
      "__main__.Bar",
      0,
      0,
      Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
      const_cast<PyType_Slot*>(slots),
  };
  PyObjectPtr type(PyType_FromSpec(&spec));
  moduleSet("__main__", "Bar", type);

  PyRun_SimpleString(R"(
b = Bar()
)");

  PyObjectPtr func(mainModuleGet("b"));
  PyObjectPtr args(PyTuple_New(0));
  PyObjectPtr result(PyObject_Call(func, args, nullptr));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "from_tp_call"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallFunctionCalls) {
  PyRun_SimpleString(R"(
def func(*args):
  return f"{args!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr result(
      PyObject_CallFunction(func, "(iI)s#i", 3, 7, "aaaa", 3, 99));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "((3, 7), 'aaa', 99)"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallFunctionWithTypeAndTupleCalls) {
  PyObjectPtr result(
      PyObject_CallFunction(reinterpret_cast<PyObject*>(&PyList_Type),
                            "((ss#i))", "bce", "aaaa", 3, 99));
  EXPECT_TRUE(PyList_CheckExact(result));
  EXPECT_EQ(PyList_Size(result), 3);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "bce"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "aaa"));
  EXPECT_TRUE(isLongEqualsLong(PyList_GetItem(result, 2), 99));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallFunctionWithTypeAndListCalls) {
  PyObjectPtr result(
      PyObject_CallFunction(reinterpret_cast<PyObject*>(&PyList_Type), "[ss#i]",
                            "bce", "aaaa", 3, 99));
  EXPECT_TRUE(PyList_CheckExact(result));
  EXPECT_EQ(PyList_Size(result), 3);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "bce"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "aaa"));
  EXPECT_TRUE(isLongEqualsLong(PyList_GetItem(result, 2), 99));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCallFunctionWithNonCallableRaisesTypeError) {
  PyObjectPtr result(PyObject_CallFunction(Py_None, nullptr));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallFunctionPropagatesException) {
  PyRun_SimpleString(R"(
def func():
  raise UserWarning()
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr result(PyObject_CallFunction(func, nullptr));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallFunctionSizeTCalls) {
  PyRun_SimpleString(R"(
def func(*args):
  return f"{args!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr result(
      PyObject_CallFunction(func, "is#i", 7, "bbb", Py_ssize_t{2}, 14));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(7, 'bb', 14)"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallMethodWithEmptyTuplePassesNoArgs) {
  PyRun_SimpleString(R"(
class C:
  def func(self, *arg):
    return f"{self.__class__.__name__} {arg}"
instance = C()
)");
  PyObjectPtr instance(mainModuleGet("instance"));
  PyObjectPtr result(PyObject_CallMethod(instance, "func", "()"));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "C ()"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallMethodWithIntTuplePassesTwoInts) {
  PyRun_SimpleString(R"(
class C:
  def func(self, *arg):
    return f"{self.__class__.__name__} {arg}"
instance = C()
)");
  PyObjectPtr instance(mainModuleGet("instance"));
  PyObjectPtr result(PyObject_CallMethod(instance, "func", "(ii)", 5, 10));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "C (5, 10)"));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCallMethodWithTupleAndIntPassesTwoArgs) {
  PyRun_SimpleString(R"(
class C:
  def func(self, *arg):
    return f"{self.__class__.__name__} {arg}"
instance = C()
)");
  PyObjectPtr instance(mainModuleGet("instance"));
  PyObjectPtr result(PyObject_CallMethod(instance, "func", "()i", 10));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "C ((), 10)"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallMethodCalls) {
  PyRun_SimpleString(R"(
class C:
  x = 42
  def func(self, *args):
    return f"{self.x}{args!r}"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyObject_CallMethod(c, "func", "s#(i)", "ccc", 1, 7));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "42('c', (7,))"));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCallMethodWithNonExistentMemberRaisesAttributeError) {
  PyObjectPtr result(PyObject_CallMethod(Py_None, "foo", nullptr));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_AttributeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallMethodPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def func(self):
    raise UserWarning()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyObject_CallMethod(c, "func", nullptr));
  EXPECT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallMethodObjArgsCalls) {
  PyRun_SimpleString(R"(
class C:
  x = 23
  def func(self, *args):
    return f"{self.x}{args!r}"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr name(PyUnicode_FromString("func"));
  PyObjectPtr arg0(PyLong_FromLong(-13));
  PyObjectPtr arg1(PyUnicode_FromString("zzz"));
  PyObjectPtr result(
      PyObject_CallMethodObjArgs(c, name, arg0.get(), arg1.get(), nullptr));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "23(-13, 'zzz')"));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCallMethodObjArgsWithNullObjectRaisesSystemError) {
  PyObjectPtr name(PyUnicode_FromString("func"));
  PyObjectPtr result(PyObject_CallMethodObjArgs(nullptr, name));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCallMethodObjArgsWithNullMethodNameRaisesSystemError) {
  PyObjectPtr result(PyObject_CallMethodObjArgs(Py_None, nullptr));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallMethodSizeTCalls) {
  PyRun_SimpleString(R"(
class C:
  x = -5
  def func(self, *args):
    return f"{self.x}{args!r}"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(_PyObject_CallMethod_SizeT(c, "func", "is#i", 9, "ddd",
                                                Py_ssize_t{2}, 8));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "-5(9, 'dd', 8)"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallObjectCalls) {
  PyRun_SimpleString(R"(
class C:
  x = 9
  def __call__(self, *args):
    return f"{self.x}{args!r}"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyUnicode_FromString("two"));
  PyObjectPtr three(PyLong_FromLong(3));
  PyObjectPtr args(PyTuple_Pack(3, one.get(), two.get(), three.get()));
  PyObjectPtr result(PyObject_CallObject(c, args));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "9(1, 'two', 3)"));
}

TEST_F(AbstractExtensionApiTest, PyObjectCallObjectWithArgsNullptrCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr result(PyObject_CallObject(func, nullptr));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(){}"));
}

TEST_F(AbstractExtensionApiTest, PyObjCallFunctionObjArgsWithNullReturnsNull) {
  testing::PyObjectPtr test(PyObject_CallFunctionObjArgs(nullptr, nullptr));
  EXPECT_EQ(nullptr, test);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjCallFunctionObjArgsWithNonFunctionReturnsNull) {
  testing::PyObjectPtr non_func(PyTuple_New(0));
  testing::PyObjectPtr test(PyObject_CallFunctionObjArgs(non_func, nullptr));
  EXPECT_EQ(test, nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectGetBufferWithBytesReturnsBuffer) {
  Py_buffer buffer;
  PyObjectPtr bytes(PyBytes_FromStringAndSize("hello\0world", 11));
  Py_ssize_t old_refcnt = Py_REFCNT(bytes);
  int result = PyObject_GetBuffer(bytes, &buffer, 0);
  EXPECT_EQ(Py_REFCNT(bytes), old_refcnt + 1);
  ASSERT_EQ(buffer.len, 11);
  EXPECT_EQ(std::memcmp(buffer.buf, "hello\0world", 11), 0);
  ASSERT_EQ(result, 0);
  PyBuffer_Release(&buffer);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(bytes), old_refcnt);
}

TEST_F(AbstractExtensionApiTest, PyObjectGetBufferWithByteArrayReturnsBuffer) {
  Py_buffer buffer;
  PyObjectPtr bytearray(PyByteArray_FromStringAndSize("hello\0world", 11));
  Py_ssize_t old_refcnt = Py_REFCNT(bytearray);
  int result = PyObject_GetBuffer(bytearray, &buffer, 0);
  EXPECT_EQ(Py_REFCNT(bytearray), old_refcnt + 1);
  ASSERT_EQ(buffer.len, 11);
  EXPECT_EQ(std::memcmp(buffer.buf, "hello\0world", 11), 0);
  ASSERT_EQ(result, 0);
  PyBuffer_Release(&buffer);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(bytearray), old_refcnt);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithBufferProtocolObjectReturnsBuffer) {
  static char contents[] = "hello world";
  static Py_ssize_t contents_len = std::strlen(contents);
  getbufferproc getbuffer_func = [](PyObject* obj, Py_buffer* view, int flags) {
    return PyBuffer_FillInfo(view, obj, strdup(contents), contents_len,
                             /*readonly=*/1, flags);
  };
  releasebufferproc releasebuffer_func = [](PyObject*, Py_buffer* view) {
    std::free(view->buf);
    view->obj = nullptr;
  };
  PyType_Slot slots[] = {
      {Py_bf_getbuffer, reinterpret_cast<void*>(getbuffer_func)},
      {Py_bf_releasebuffer, reinterpret_cast<void*>(releasebuffer_func)},
      {0, nullptr},
  };
  static PyType_Spec spec;
  spec = {
      "foo.Bar", 0, 0, Py_TPFLAGS_DEFAULT, slots,
  };
  PyObjectPtr type(PyType_FromSpec(&spec));
  PyObjectPtr instance(PyObject_CallFunction(type, nullptr));

  Py_buffer buffer;
  Py_ssize_t old_refcnt = Py_REFCNT(instance);
  int result = PyObject_GetBuffer(instance, &buffer, 0);
  EXPECT_EQ(Py_REFCNT(instance), old_refcnt + 1);
  ASSERT_EQ(buffer.len, contents_len);
  EXPECT_NE(buffer.buf, contents);
  EXPECT_EQ(std::memcmp(buffer.buf, contents, contents_len), 0);
  ASSERT_EQ(result, 0);
  PyBuffer_Release(&buffer);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(instance), old_refcnt);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithBytesMemoryViewReturnsBuffer) {
  Py_buffer buffer;
  PyObjectPtr bytes(PyBytes_FromStringAndSize("hello\0world", 11));
  PyObjectPtr memoryview(PyMemoryView_FromObject(bytes));
  Py_ssize_t old_memoryview_refcnt = Py_REFCNT(memoryview);
  Py_ssize_t old_bytes_refcnt = Py_REFCNT(bytes);

  ASSERT_EQ(PyObject_GetBuffer(memoryview, &buffer, 0), 0);

  // Getting the underlying buffer increments references to the underlying
  // buffer, not the memoryview object itself.
  EXPECT_EQ(Py_REFCNT(memoryview), old_memoryview_refcnt + 1);
  EXPECT_EQ(Py_REFCNT(bytes), old_bytes_refcnt);
  ASSERT_EQ(buffer.len, 11);
  EXPECT_EQ(std::memcmp(buffer.buf, "hello\0world", 11), 0);

  PyBuffer_Release(&buffer);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(memoryview), old_memoryview_refcnt);
  EXPECT_EQ(Py_REFCNT(bytes), old_bytes_refcnt);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithBytearrayMemoryViewReturnsBuffer) {
  Py_buffer buffer;
  PyObjectPtr bytearray(PyByteArray_FromStringAndSize("hello\0world", 11));
  PyObjectPtr memoryview_unsliced(PyMemoryView_FromObject(bytearray));
  PyObjectPtr memoryview(PySequence_GetSlice(memoryview_unsliced, 0, 10));
  Py_ssize_t old_memoryview_refcnt = Py_REFCNT(memoryview);
  Py_ssize_t old_bytearray_refcnt = Py_REFCNT(bytearray);

  ASSERT_EQ(PyObject_GetBuffer(memoryview, &buffer, 0), 0);

  EXPECT_EQ(Py_REFCNT(memoryview), old_memoryview_refcnt + 1);
  EXPECT_EQ(Py_REFCNT(bytearray), old_bytearray_refcnt);
  ASSERT_EQ(buffer.len, 10);
  EXPECT_EQ(std::memcmp(buffer.buf, "hello\0worl", 10), 0);

  PyBuffer_Release(&buffer);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(memoryview), old_memoryview_refcnt);
  EXPECT_EQ(Py_REFCNT(bytearray), old_bytearray_refcnt);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithFromMemoryMemoryViewReturnsBuffer) {
  char memory[6] = "hello";
  PyObjectPtr memoryview(
      PyMemoryView_FromMemory(reinterpret_cast<char*>(memory), 6, PyBUF_READ));
  Py_ssize_t old_memoryview_refcnt = Py_REFCNT(memoryview);
  Py_buffer buffer;
  EXPECT_EQ(PyObject_GetBuffer(memoryview, &buffer, 0), 0);

  EXPECT_EQ(Py_REFCNT(memoryview), old_memoryview_refcnt + 1);
  ASSERT_EQ(buffer.len, 6);
  EXPECT_EQ(std::memcmp(buffer.buf, "hello", 6), 0);

  PyBuffer_Release(&buffer);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(memoryview), old_memoryview_refcnt);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithByteFormattedArrayReturnsBuffer) {
  PyRun_SimpleString(R"(
import array
result = array.array('b', b'hello')
)");
  PyObjectPtr array(mainModuleGet("result"));
  Py_ssize_t old_array_refcnt = Py_REFCNT(array);

  Py_buffer buffer;
  EXPECT_EQ(PyObject_GetBuffer(array, &buffer, 0), 0);

  EXPECT_EQ(Py_REFCNT(array), old_array_refcnt + 1);
  ASSERT_EQ(buffer.len, 5);
  EXPECT_EQ(std::memcmp(buffer.buf, "hello", 5), 0);

  PyBuffer_Release(&buffer);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(array), old_array_refcnt);
}

TEST_F(AbstractExtensionApiTest, PyObjectGetBufferWithQuadArrayReturnsBuffer) {
  PyRun_SimpleString(R"(
import array
result = array.array('Q')
result.append(0xdeadbeef12345678)
)");
  PyObjectPtr array(mainModuleGet("result"));
  Py_ssize_t old_array_refcnt = Py_REFCNT(array);

  Py_buffer buffer;
  EXPECT_EQ(PyObject_GetBuffer(array, &buffer, 0), 0);

  EXPECT_EQ(Py_REFCNT(array), old_array_refcnt + 1);
  char* underlying_buffer = reinterpret_cast<char*>(buffer.buf);
  ASSERT_EQ(buffer.len, 8);
  EXPECT_EQ(underlying_buffer[0], '\x78');
  EXPECT_EQ(underlying_buffer[1], '\x56');
  EXPECT_EQ(underlying_buffer[2], '\x34');
  EXPECT_EQ(underlying_buffer[3], '\x12');
  EXPECT_EQ(underlying_buffer[4], '\xef');
  EXPECT_EQ(underlying_buffer[5], '\xbe');
  EXPECT_EQ(underlying_buffer[6], '\xad');
  EXPECT_EQ(underlying_buffer[7], '\xde');

  PyBuffer_Release(&buffer);
  EXPECT_EQ(buffer.obj, nullptr);
  EXPECT_EQ(Py_REFCNT(array), old_array_refcnt);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithNonBufferExtensionObjectRaisesTypeError) {
  PyType_Slot slots[] = {
      {0, nullptr},
  };
  static PyType_Spec spec;
  spec = {
      "foo.Bar", 0, 0, Py_TPFLAGS_DEFAULT, slots,
  };
  PyObjectPtr type(PyType_FromSpec(&spec));
  PyObjectPtr instance(PyObject_CallFunction(type, nullptr));
  Py_buffer buffer;
  EXPECT_EQ(PyObject_GetBuffer(instance, &buffer, 0), -1);
  EXPECT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithNonBufferManagedObjectRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
instance = C()
)");
  Py_buffer buffer;
  PyObjectPtr instance(mainModuleGet("instance"));
  EXPECT_EQ(PyObject_GetBuffer(instance, &buffer, 0), -1);
  EXPECT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectGetBufferWithNonBufferBuiltinTypeRaisesTypeError) {
  Py_buffer buffer;
  PyObjectPtr instance(PyLong_FromLong(42));
  EXPECT_EQ(PyObject_GetBuffer(instance, &buffer, 0), -1);
  EXPECT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, CallFunctionObjArgsWithNoArgsReturnsValue) {
  PyRun_SimpleString(R"(
def func():
  return 5
  )");

  testing::PyObjectPtr func(testing::mainModuleGet("func"));
  testing::PyObjectPtr func_result(PyObject_CallFunctionObjArgs(func, nullptr));
  EXPECT_EQ(PyLong_AsLong(func_result), 5);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       CallFunctionObjArgsWithCallableClassReturnsValue) {
  PyRun_SimpleString(R"(
class Foo():
  def __call__(self):
    return 5
f = Foo()
  )");

  testing::PyObjectPtr f(testing::mainModuleGet("f"));
  testing::PyObjectPtr f_result(PyObject_CallFunctionObjArgs(f, nullptr));
  EXPECT_EQ(PyLong_AsLong(f_result), 5);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       CallFunctionObjArgsWithManyArgumentsReturnsValue) {
  PyRun_SimpleString(R"(
def func(a, b, c, d, e, f):
  return a + b + c + d + e + f
  )");

  testing::PyObjectPtr func(testing::mainModuleGet("func"));
  PyObject* one = PyLong_FromLong(1);
  PyObject* two = PyLong_FromLong(2);
  testing::PyObjectPtr func_result(PyObject_CallFunctionObjArgs(
      func, one, one, two, two, one, two, nullptr));
  Py_DECREF(one);
  Py_DECREF(two);
  EXPECT_EQ(PyLong_AsLong(func_result), 9);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectCheckBufferWithBytesReturnsTrue) {
  PyObjectPtr obj(PyBytes_FromString("foo"));
  EXPECT_TRUE(PyObject_CheckBuffer(obj.get()));
}

TEST_F(AbstractExtensionApiTest, PyObjectCheckBufferWithBytearrayReturnsTrue) {
  PyObjectPtr obj(PyByteArray_FromStringAndSize("foo", 3));
  EXPECT_TRUE(PyObject_CheckBuffer(obj.get()));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCheckBufferWithBufferObjectReturnsTrue) {
  static char contents[] = "hello world";
  static Py_ssize_t contents_len = std::strlen(contents);
  getbufferproc getbuffer_func = [](PyObject* obj, Py_buffer* view, int flags) {
    return PyBuffer_FillInfo(view, obj, strdup(contents), contents_len,
                             /*readonly=*/1, flags);
  };
  releasebufferproc releasebuffer_func = [](PyObject*, Py_buffer* view) {
    std::free(view->buf);
    view->obj = nullptr;
  };
  PyType_Slot slots[] = {
      {Py_bf_getbuffer, reinterpret_cast<void*>(getbuffer_func)},
      {Py_bf_releasebuffer, reinterpret_cast<void*>(releasebuffer_func)},
      {0, nullptr},
  };
  static PyType_Spec spec;
  spec = {
      "foo.Bar", 0, 0, Py_TPFLAGS_DEFAULT, slots,
  };
  PyObjectPtr type(PyType_FromSpec(&spec));
  PyObjectPtr obj(PyObject_CallFunction(type, nullptr));
  EXPECT_TRUE(PyObject_CheckBuffer(obj.get()));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectCheckBufferWithNonByteslikeReturnsFalse) {
  PyObjectPtr obj(PyLong_FromLong(2));
  EXPECT_FALSE(PyObject_CheckBuffer(obj.get()));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectFastCallDictWithPositionalsAndKeywordArgsCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObject* args[] = {
      PyLong_FromLong(3),
      PyUnicode_FromString("lll"),
      PyLong_FromLong(2),
  };
  size_t n_args = Py_ARRAY_LENGTH(args);
  PyObjectPtr kwargs(PyDict_New());
  PyObjectPtr kwarg_name(PyUnicode_FromString("kwarg"));
  PyObjectPtr kwarg_value(PyLong_FromLong(7));
  PyDict_SetItem(kwargs, kwarg_name, kwarg_value);
  PyObjectPtr result(_PyObject_FastCallDict(func, args, n_args, kwargs));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(3, 'lll', 2){'kwarg': 7}"));
  for (size_t i = 0; i < n_args; i++) {
    Py_DECREF(args[i]);
  }
}

TEST_F(AbstractExtensionApiTest, PyObjectFastCallDictWithNoArgsCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr result(_PyObject_FastCallDict(func, nullptr, 0, nullptr));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(){}"));
}

TEST_F(AbstractExtensionApiTest, PyObjectFastCallDictWithoutKeywordArgsCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObject* args[] = {
      PyLong_FromLong(7),
      PyUnicode_FromString("xxx"),
      PyLong_FromLong(16),
  };
  size_t n_args = Py_ARRAY_LENGTH(args);
  PyObjectPtr result(_PyObject_FastCallDict(func, args, n_args, nullptr));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(7, 'xxx', 16){}"));
  for (size_t i = 0; i < n_args; i++) {
    Py_DECREF(args[i]);
  }
}

TEST_F(AbstractExtensionApiTest,
       PyObjectFastCallDictWithZeroPositionalsAndKeywordArgsCalls) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  return f"{args!r}{kwargs!r}"
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObjectPtr kwargs(PyDict_New());
  PyObjectPtr kwarg_name(PyUnicode_FromString("kwarg"));
  PyObjectPtr kwarg_value(PyLong_FromLong(2));
  PyDict_SetItem(kwargs, kwarg_name, kwarg_value);
  PyObjectPtr result(_PyObject_FastCallDict(func, nullptr, 0, kwargs));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "(){'kwarg': 2}"));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectFastCallDictWithPositionalsAndKeywordArgsPropagatesException) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  raise UserWarning()
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObject* args[] = {
      PyLong_FromLong(8),
  };
  size_t n_args = Py_ARRAY_LENGTH(args);
  PyObjectPtr kwargs(PyDict_New());
  PyObjectPtr kwarg_name(PyUnicode_FromString("kwarg"));
  PyObjectPtr kwarg_value(PyLong_FromLong(7));
  PyDict_SetItem(kwargs, kwarg_name, kwarg_value);
  PyObjectPtr result(_PyObject_FastCallDict(func, args, n_args, kwargs));
  for (size_t i = 0; i < n_args; i++) {
    Py_DECREF(args[i]);
  }
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectFastCallDictWithoutKeywordArgsPropagatesException) {
  PyRun_SimpleString(R"(
def func(*args, **kwargs):
  raise UserWarning()
)");
  PyObjectPtr func(mainModuleGet("func"));
  PyObject* args[] = {
      PyUnicode_FromString(""),
  };
  size_t n_args = Py_ARRAY_LENGTH(args);
  PyObjectPtr result(_PyObject_FastCallDict(func, args, n_args, nullptr));
  for (size_t i = 0; i < n_args; i++) {
    Py_DECREF(args[i]);
  }
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_UserWarning));
}

TEST_F(AbstractExtensionApiTest, GetIterWithNoDunderIterRaises) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyObject_GetIter(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, GetIterWithNonCallableDunderIterRaises) {
  PyRun_SimpleString(R"(
class C:
  __iter__ = 4
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyObject_GetIter(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, GetIterWithDunderIterReturningNonIterRaises) {
  PyRun_SimpleString(R"(
class C:
  def __iter__(self):
    return 4
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyObject_GetIter(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, GetIterPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __iter__(self):
    raise ValueError("hi")
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyObject_GetIter(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(AbstractExtensionApiTest, PyObjectIsInstanceWithNonTypeRaisesTypeError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  PyObjectPtr cls(PyList_New(0));
  EXPECT_EQ(PyObject_IsInstance(obj, cls), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectIsInstanceWithTypeReturnsTrue) {
  PyObjectPtr obj(PyList_New(0));
  PyObjectPtr cls(PyObject_Type(obj));
  EXPECT_EQ(PyObject_IsInstance(obj, cls), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsInstanceWithSupertypeReturnsTrue) {
  PyObjectPtr obj(PyLong_FromLong(0));
  PyObjectPtr cls(PyObject_Type(obj));
  EXPECT_EQ(PyObject_IsInstance(Py_True, cls), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsInstanceWithSubtypeReturnsFalse) {
  PyObjectPtr obj(PyLong_FromLong(0));
  PyObjectPtr cls(PyObject_Type(Py_True));
  EXPECT_EQ(PyObject_IsInstance(obj, cls), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsInstanceWithTupleChecksTypes) {
  PyObjectPtr obj1(PyList_New(0));
  PyObjectPtr obj2(PyLong_FromLong(10));
  PyObjectPtr cls(PyTuple_New(3));
  PyTuple_SetItem(cls, 0, PyObject_Type(obj1));
  PyTuple_SetItem(cls, 1, PyObject_Type(obj2));
  PyTuple_SetItem(cls, 2, PySet_New(nullptr));
  EXPECT_EQ(PyObject_IsInstance(Py_True, cls), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsSubclassWithNonTypeRaisesTypeError) {
  PyObjectPtr obj(PyLong_FromLong(2));
  PyObjectPtr subclass(PyObject_Type(obj));
  PyObjectPtr superclass(PyList_New(0));
  EXPECT_EQ(PyObject_IsSubclass(subclass, superclass), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectIsSubclassWithSameTypesReturnsTrue) {
  PyObjectPtr obj1(PyLong_FromLong(2));
  PyObjectPtr obj2(PyLong_FromLong(10));
  PyObjectPtr subclass(PyObject_Type(obj1));
  PyObjectPtr superclass(PyObject_Type(obj2));
  EXPECT_EQ(PyObject_IsSubclass(subclass, superclass), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsSubclassWithSubtypeReturnsTrue) {
  PyObjectPtr obj(PyLong_FromLong(10));
  PyObjectPtr subclass(PyObject_Type(Py_True));
  PyObjectPtr superclass(PyObject_Type(obj));
  EXPECT_EQ(PyObject_IsSubclass(subclass, superclass), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsSubclassWithSupertypeReturnsFalse) {
  PyObjectPtr obj(PyLong_FromLong(10));
  PyObjectPtr subclass(PyObject_Type(obj));
  PyObjectPtr superclass(PyObject_Type(Py_True));
  EXPECT_EQ(PyObject_IsSubclass(subclass, superclass), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectIsSubclassWithTupleChecksTypes) {
  PyObjectPtr obj1(PyList_New(0));
  PyObjectPtr obj2(PyLong_FromLong(10));
  PyObjectPtr subclass(PyObject_Type(Py_True));
  PyObjectPtr superclass(PyTuple_New(3));
  PyTuple_SetItem(superclass, 0, PyObject_Type(obj1));
  PyTuple_SetItem(superclass, 1, PyObject_Type(obj2));
  PyTuple_SetItem(superclass, 2, PySet_New(nullptr));
  EXPECT_EQ(PyObject_IsSubclass(subclass, superclass), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthOnNullRaisesSystemError) {
  EXPECT_EQ(PyObject_Length(nullptr), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthWithoutDunderLenRaisesTypeError) {
  PyObjectPtr num(PyLong_FromLong(3));
  ASSERT_EQ(PyObject_Length(num), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthHintWithDunderLengthReturnsValueOfDunderLength) {
  PyRun_SimpleString(R"(
class Bar:
  def __len__(self): return 1
  def __length_hint__(self): return 500
obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthHintWithDunderLengthRaisingNonTypeErrorRaisesError) {
  PyRun_SimpleString(R"(
class Bar:
  def __len__(self): raise ValueError
  def __length_hint__(self): return 500
obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(
    AbstractExtensionApiTest,
    PyObjectLengthHintWithDunderLengthRaisingTypeErrorReturnsDunderLengthHintValue) {
  PyRun_SimpleString(R"(
class Bar:
  def __len__(self): raise TypeError
  def __length_hint__(self): return 500
obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), 500);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(
    AbstractExtensionApiTest,
    PyObjectLengthHintWithoutDunderLengthAndDunderLengthHintReturnsDefaultValue) {
  PyRun_SimpleString(R"(
class Bar: pass

obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), 234);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(
    AbstractExtensionApiTest,
    PyObjectLengthHintWithNotImplementedDunderLengthHintReturnsDefaultValue) {
  PyRun_SimpleString(R"(
class Bar:
  def __length_hint__(self): return NotImplemented

obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), 234);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(
    AbstractExtensionApiTest,
    PyObjectLengthHintWithDunderLengthHintRaisingExceptionReturnsNegativeValue) {
  PyRun_SimpleString(R"(
class Bar:
  def __length_hint__(self): raise ValueError

obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthHintWithDunderLengthHintReturningNonIntRaisesTypeError) {
  PyRun_SimpleString(R"(
class Bar:
  def __length_hint__(self): return "not int"

obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(
    AbstractExtensionApiTest,
    PyObjectLengthHintWithDunderLengthHintReturningLargeIntNotFitInWordRaisesOverflowError) {
  PyRun_SimpleString(R"(
class Bar:
  def __length_hint__(self): return 13843149871348971349871398471389473

obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_OverflowError));
}

TEST_F(
    AbstractExtensionApiTest,
    PyObjectLengthHintWithDunderLengthHintReturningNegativeNumberRaisesValueError) {
  PyRun_SimpleString(R"(
class Bar:
  def __length_hint__(self): return -1

obj = Bar()
  )");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_LengthHint(obj, 234), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithNonIntLenRaisesTypeError) {
  PyRun_SimpleString(R"(
class Foo:
  def __len__(self):
    return "foo"
obj = Foo()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithoutIndexRaisesTypeError) {
  PyRun_SimpleString(R"(
class Foo: pass
class Bar:
  def __len__(self): return Foo()
obj = Bar()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithNonIntIndexRaisesTypeError) {
  PyRun_SimpleString(R"(
class Foo:
  def __index__(self): return None
class Bar:
  def __len__(self): return Foo()
obj = Bar()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthWithIntSubclassLargeRaisesOverflowError) {
  PyRun_SimpleString(R"(
class Foo(int): pass
class Bar:
  def __len__(self): return Foo(2**63)
obj = Bar()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_OverflowError));
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithIntSubclassReturnsValue) {
  PyRun_SimpleString(R"(
class Foo(int): pass
class Bar:
  def __len__(self): return Foo(5)
obj = Bar()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_Length(obj), 5);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithIndexReturnsValue) {
  PyRun_SimpleString(R"(
class Foo:
  def __index__(self): return 1
class Bar:
  def __len__(self): return Foo()
obj = Bar()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PyObject_Length(obj), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthWithNegativeLenRaisesValueError) {
  PyRun_SimpleString(R"(
class Foo:
  def __len__(self):
    return -5
obj = Foo()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(AbstractExtensionApiTest,
       PyObjectLengthWithOverflowRaisesOverflowError) {
  PyRun_SimpleString(R"(
class Foo:
  def __len__(self):
    return 0x8000000000000000
obj = Foo()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_OverflowError));
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithUnderflowRaisesValueError) {
  PyRun_SimpleString(R"(
class Foo:
  def __len__(self):
    return -0x8000000000000001
obj = Foo()
  )");

  PyObjectPtr obj(mainModuleGet("obj"));
  ASSERT_EQ(PyObject_Length(obj), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithEmptyDictReturnsZero) {
  PyObjectPtr dict(PyDict_New());
  EXPECT_EQ(PyObject_Length(dict), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithEmptyListReturnsZero) {
  PyObjectPtr list(PyList_New(0));
  EXPECT_EQ(PyObject_Length(list), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithEmptyStringReturnsZero) {
  PyObjectPtr str(PyUnicode_FromString(""));
  EXPECT_EQ(PyObject_Length(str), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithNonEmptyDictReturnsValue) {
  PyObjectPtr dict(PyDict_New());

  {
    PyObjectPtr value(PyLong_FromLong(3));

    PyObjectPtr key1(PyLong_FromLong(1));
    PyDict_SetItem(dict, key1, value);

    PyObjectPtr key2(PyLong_FromLong(2));
    PyDict_SetItem(dict, key2, value);
  }

  EXPECT_EQ(PyObject_Length(dict), 2);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithNonEmptyListReturnsValue) {
  PyObjectPtr list(PyList_New(3));
  EXPECT_EQ(PyObject_Length(list), 3);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectLengthWithNonEmptyStringReturnsValue) {
  PyObjectPtr str(PyUnicode_FromString("foo"));
  EXPECT_EQ(PyObject_Length(str), 3);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PyObjectSizeOnNullRaisesSystemError) {
  EXPECT_EQ(PyObject_Size(nullptr), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyObjectTypeOnNullRaisesSystemError) {
  EXPECT_EQ(PyObject_Type(nullptr), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PyObjectTypeReturnsType) {
  PyObjectPtr num(PyLong_FromLong(4));
  PyObjectPtr type(PyObject_Type(num));
  EXPECT_TRUE(PyType_Check(type));
}

TEST_F(AbstractExtensionApiTest, PyObjectTypeReturnsSameTypeForSmallAndLarge) {
  PyObjectPtr str1(PyUnicode_FromString("short"));
  PyObjectPtr str2(PyUnicode_FromString("This is a longer string."));
  PyObjectPtr type1(PyObject_Type(str1));
  PyObjectPtr type2(PyObject_Type(str2));
  EXPECT_EQ(type1, type2);
}

#ifndef Py_SET_TYPE
#define Py_SET_TYPE(obj, type) ((Py_TYPE(obj) = (type)), (void)0)
#endif

TEST_F(AbstractExtensionApiTest, PySETTYPEWithObjectSetsType) {
  PyRun_SimpleString(R"(
class C:
  pass
class D:
  pass
instance = C()
)");
  PyObjectPtr class_c(mainModuleGet("C"));
  PyObjectPtr class_d(mainModuleGet("D"));
  PyObjectPtr instance(mainModuleGet("instance"));
  EXPECT_TRUE(PyObject_IsInstance(instance, class_c));
  // The instance must have an owned reference to D
  Py_INCREF(class_d);
  Py_SET_TYPE(instance.get(), class_d.asTypeObject());
  EXPECT_TRUE(PyObject_IsInstance(instance, class_d));
}

TEST_F(AbstractExtensionApiTest, PySETTYPEWithTypeObjectSetsMetaclass) {
  PyRun_SimpleString(R"(
class M(type):
  pass
class C(metaclass=M):
  pass
class D(type):
  pass
)");
  PyObjectPtr class_m(mainModuleGet("M"));
  PyObjectPtr class_c(mainModuleGet("C"));
  PyObjectPtr class_d(mainModuleGet("D"));
  EXPECT_TRUE(PyObject_IsInstance(class_c, class_m));
  // The instance must have an owned reference to D
  Py_INCREF(class_d);
  Py_SET_TYPE(class_c.get(), class_d.asTypeObject());
  EXPECT_TRUE(PyObject_IsInstance(class_c, class_d));
}

// Sequence Protocol

TEST_F(AbstractExtensionApiTest,
       PySequenceBytesToCharpArrayWithNonSequenceRaisesTypeError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(_PySequence_BytesToCharpArray(obj), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceBytesToCharpArrayWithEmptyListReturnsArray) {
  PyObjectPtr obj(PyList_New(0));
  char* const* array = _PySequence_BytesToCharpArray(obj);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_NE(array, nullptr);
  EXPECT_EQ(array[0], nullptr);
  _Py_FreeCharPArray(array);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceBytesToCharpArrayWithNonBytesItemRaisesTypeError) {
  PyObjectPtr obj(PyTuple_New(1));
  PyTuple_SetItem(obj, 0, PyByteArray_FromStringAndSize("foo", 3));
  EXPECT_EQ(_PySequence_BytesToCharpArray(obj), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceBytesToCharpArrayWithBytesSequenceReturnsArray) {
  PyObjectPtr obj(PyTuple_New(3));
  PyTuple_SetItem(obj, 0, PyBytes_FromString("foo"));
  PyTuple_SetItem(obj, 1, PyBytes_FromString("bar"));
  PyTuple_SetItem(obj, 2, PyBytes_FromString("baz"));
  char* const* array = _PySequence_BytesToCharpArray(obj);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_NE(array, nullptr);
  EXPECT_STREQ(array[0], "foo");
  EXPECT_STREQ(array[1], "bar");
  EXPECT_STREQ(array[2], "baz");
  EXPECT_EQ(array[3], nullptr);
  _Py_FreeCharPArray(array);
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithoutGetItemReturnsFalse) {
  PyRun_SimpleString(R"(
class ClassWithoutDunderGetItem: pass

obj = ClassWithoutDunderGetItem()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_FALSE(PySequence_Check(obj));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceCheckWithoutGetItemOnClassReturnsFalse) {
  PyRun_SimpleString(R"(
class ClassWithoutDunderGetItem: pass

obj = ClassWithoutDunderGetItem()
obj.__getitem__ = lambda self, key : 1
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_FALSE(PySequence_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithNumericReturnsFalse) {
  PyObjectPtr num(PyLong_FromLong(3));
  EXPECT_FALSE(PySequence_Check(num));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithSetReturnsFalse) {
  PyObjectPtr set(PySet_New(nullptr));
  EXPECT_FALSE(PySequence_Check(set));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithDictReturnsFalse) {
  PyObjectPtr dict(PyDict_New());
  EXPECT_FALSE(PySequence_Check(dict));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithDictSubclassReturnsFalse) {
  PyRun_SimpleString(R"(
class Subclass(dict): pass

obj = Subclass()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_FALSE(PySequence_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithNoneReturnsFalse) {
  EXPECT_FALSE(PySequence_Check(Py_None));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithGetItemMethodReturnsTrue) {
  PyRun_SimpleString(R"(
class ClassWithDunderGetItemMethod:
  def __getitem__(self, key):
    return None

obj = ClassWithDunderGetItemMethod()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_TRUE(PySequence_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithGetItemAttrReturnsTrue) {
  PyRun_SimpleString(R"(
class ClassWithDunderGetItemAttr:
  __getitem__ = 42

obj = ClassWithDunderGetItemAttr()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_TRUE(PySequence_Check(obj));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithStringReturnsTrue) {
  PyObjectPtr str(PyUnicode_FromString("foo"));
  EXPECT_TRUE(PySequence_Check(str));
}

TEST_F(AbstractExtensionApiTest, PySequenceCheckWithListReturnsTrue) {
  PyObjectPtr list(PyList_New(3));
  EXPECT_TRUE(PySequence_Check(list));
}

TEST_F(AbstractExtensionApiTest, PySequenceConcatWithNullLeftRaises) {
  PyObjectPtr tuple(PyTuple_New(0));
  PyObjectPtr result(PySequence_Concat(nullptr, tuple));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceConcatWithNullRightRaises) {
  PyObjectPtr tuple(PyTuple_New(0));
  PyObjectPtr result(PySequence_Concat(tuple, nullptr));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceConcatCallsDunderAdd) {
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));
  PyObjectPtr three(PyLong_FromLong(3));
  PyObjectPtr four(PyLong_FromLong(4));
  PyObjectPtr left(PyTuple_Pack(2, one.get(), two.get()));
  PyObjectPtr right(PyTuple_Pack(2, three.get(), four.get()));
  PyObjectPtr result(PySequence_Concat(left, right));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyTuple_CheckExact(result));
  ASSERT_EQ(PyTuple_Size(result), 4);
  EXPECT_EQ(PyTuple_GetItem(result, 0), PyTuple_GetItem(left, 0));
  EXPECT_EQ(PyTuple_GetItem(result, 1), PyTuple_GetItem(left, 1));
  EXPECT_EQ(PyTuple_GetItem(result, 2), PyTuple_GetItem(right, 0));
  EXPECT_EQ(PyTuple_GetItem(result, 3), PyTuple_GetItem(right, 1));
}

TEST_F(AbstractExtensionApiTest, PySequenceRepeatWithNullSeqRaises) {
  PyObjectPtr result(PySequence_Repeat(nullptr, 5));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceRepeatCallsDunderMul) {
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));
  PyObjectPtr seq(PyTuple_Pack(2, one.get(), two.get()));
  PyObjectPtr result(PySequence_Repeat(seq, 2));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_EQ(PyTuple_Size(result), 4);
  EXPECT_EQ(PyTuple_GetItem(result, 0), PyTuple_GetItem(seq, 0));
  EXPECT_EQ(PyTuple_GetItem(result, 1), PyTuple_GetItem(seq, 1));
  EXPECT_EQ(PyTuple_GetItem(result, 2), PyTuple_GetItem(seq, 0));
  EXPECT_EQ(PyTuple_GetItem(result, 3), PyTuple_GetItem(seq, 1));
}

TEST_F(AbstractExtensionApiTest, PySequenceCountWithNullSeqRaises) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PySequence_Count(nullptr, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceCountWithNullObjRaises) {
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));
  PyObjectPtr tuple(PyTuple_Pack(2, one.get(), two.get()));
  EXPECT_EQ(PySequence_Count(tuple, nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceCountCountsOccurrences) {
  PyObjectPtr obj(PyLong_FromLong(2));
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two1(PyLong_FromLong(2));
  PyObjectPtr two2(PyLong_FromLong(2));
  PyObjectPtr tuple(PyTuple_Pack(3, one.get(), two1.get(), two2.get()));
  EXPECT_EQ(PySequence_Count(tuple, obj), 2);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PySequenceGetItemCallsDunderGetItem) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    return 7
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_GetItem(c, 0));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(result), 7);
}

TEST_F(AbstractExtensionApiTest, PySequenceItemCallsDunderGetItem) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    return 7
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_ITEM(c, 0));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(result), 7);
}

TEST_F(AbstractExtensionApiTest, PySequenceItemDunderGetItemRaises) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    raise Exception("foo")
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_ITEM(c, 0));
  ASSERT_EQ(result, nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PySequenceSetItemWithNullValCallsDelItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __delitem__(self, key):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PySequence_SetItem(c, 0, nullptr), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest, PySequenceSetItemCallsDunderSetItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __setitem__(self, key, val):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr val(PyLong_FromLong(4));
  ASSERT_EQ(PySequence_SetItem(c, 0, val), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceGetItemWithTupleReturnsTupleElement) {
  PyObjectPtr tuple(PyTuple_New(2));
  ASSERT_EQ(PyTuple_SetItem(tuple, 0, PyUnicode_FromString("first")), 0);
  ASSERT_EQ(PyTuple_SetItem(tuple, 1, PyUnicode_FromString("second")), 0);

  PyObjectPtr result(PySequence_GetItem(tuple, 0));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "first"));

  result = PySequence_GetItem(tuple, 1);
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "second"));
}

TEST_F(AbstractExtensionApiTest, PySequenceGetItemWithListReturnsListElement) {
  PyObjectPtr list(PyList_New(2));
  ASSERT_EQ(PyList_SetItem(list, 0, PyUnicode_FromString("first")), 0);
  ASSERT_EQ(PyList_SetItem(list, 1, PyUnicode_FromString("second")), 0);

  PyObjectPtr result(PySequence_GetItem(list, 0));
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "first"));

  result = PySequence_GetItem(list, 1);
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "second"));
}

TEST_F(AbstractExtensionApiTest, PySequenceDelItemCallsDunderDelItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __delitem__(self, key):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PySequence_DelItem(c, 0), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest, PySequenceContainsCallsDunderContains) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    pass
  def __contains__(self, key):
    return True
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(3));
  ASSERT_EQ(PySequence_Contains(c, key), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PySequenceContainsPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    pass
  def __contains__(self, key):
    raise ValueError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(3));
  ASSERT_EQ(PySequence_Contains(c, key), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_ValueError));
}

TEST_F(AbstractExtensionApiTest, PySequenceContainsFallsBackToIterSearch) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    pass
  def __iter__(self):
    return [1,2,3].__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(4));
  ASSERT_EQ(PySequence_Contains(c, key), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PySequenceIndexWithNullObjRaises) {
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));
  PyObjectPtr tuple(PyTuple_Pack(2, one.get(), two.get()));
  EXPECT_EQ(PySequence_Index(tuple, nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceIndexFindsFirstOccurrence) {
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));
  PyObjectPtr tuple(PyTuple_Pack(3, one.get(), two.get(), two.get()));
  EXPECT_EQ(PySequence_Index(tuple, two), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PySequenceFastWithNullObjRaisesSystemError) {
  EXPECT_EQ(PySequence_Fast(nullptr, "msg"), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceFastWithTupleReturnsSameObject) {
  PyObjectPtr tuple(PyTuple_New(3));
  PyObjectPtr result(PySequence_Fast(tuple, "msg"));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(tuple, result);
}

TEST_F(AbstractExtensionApiTest, PySequenceFastWithListReturnsSameObject) {
  PyObjectPtr list(PyList_New(3));
  PyObjectPtr result(PySequence_Fast(list, "msg"));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(list, result);
}

TEST_F(AbstractExtensionApiTest, PySequenceFastWithNonIterableRaisesTypeError) {
  ASSERT_EQ(PySequence_Fast(Py_None, "msg"), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceFastGetSizeWithTupleReturnsSize) {
  PyObjectPtr tuple(PyTuple_Pack(3, Py_None, Py_None, Py_None));
  PyObjectPtr fast_seq(PySequence_Fast(tuple, ""));
  EXPECT_EQ(PySequence_Fast_GET_SIZE(fast_seq.get()), 3);
}

TEST_F(AbstractExtensionApiTest, PySequenceFastGetSizeWithListReturnsSize) {
  PyObjectPtr list(PyList_New(0));
  for (int i = 0; i < 11; i++) {
    PyList_Append(list, Py_None);
  }
  PyObjectPtr fast_seq(PySequence_Fast(list, ""));
  EXPECT_EQ(PySequence_Fast_GET_SIZE(fast_seq.get()), 11);
}

TEST_F(AbstractExtensionApiTest, PySequenceFastGetItemWithTupleReturnsItem) {
  PyObjectPtr number(PyLong_FromLong(42));
  PyObjectPtr tuple(PyTuple_Pack(3, Py_None, Py_None, number.get()));
  PyObjectPtr fast_seq(PySequence_Fast(tuple, ""));
  EXPECT_TRUE(
      isLongEqualsLong(PySequence_Fast_GET_ITEM(fast_seq.get(), 2), 42));
}

TEST_F(AbstractExtensionApiTest, PySequenceFastGetItemWithListReturnsItem) {
  PyObjectPtr list(PyList_New(0));
  PyList_Append(list, Py_None);
  PyObjectPtr number(PyLong_FromLong(42));
  PyList_Append(list, number);
  PyList_Append(list, Py_None);
  PyObjectPtr fast_seq(PySequence_Fast(list, ""));
  EXPECT_TRUE(
      isLongEqualsLong(PySequence_Fast_GET_ITEM(fast_seq.get(), 1), 42));
}

TEST_F(AbstractExtensionApiTest, PySequenceFastWithIterableReturnsList) {
  PyRun_SimpleString(R"(
class C:
  def __iter__(self):
    return (1, 2, 3).__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_Fast(c, "msg"));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyList_CheckExact(result));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceInPlaceConcatWithNullLeftRaisesSystemError) {
  PyObjectPtr right(PyLong_FromLong(1));
  EXPECT_EQ(PySequence_InPlaceConcat(nullptr, right), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceInPlaceConcatWithNullRightRaisesSystemError) {
  PyObjectPtr left(PyLong_FromLong(1));
  EXPECT_EQ(PySequence_InPlaceConcat(left, nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceInPlaceConcatWithByteArrayLeftReturnsByteArray) {
  PyObjectPtr left(PyByteArray_FromStringAndSize("foo", 3));
  PyObjectPtr right(PyBytes_FromString("bar"));
  PyObjectPtr result(PySequence_InPlaceConcat(left, right));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(result, left);
  EXPECT_STREQ(PyByteArray_AsString(left), "foobar");
}

TEST_F(AbstractExtensionApiTest,
       PySequenceInPlaceConcatWithoutDunderGetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C: pass
left = C()
)");
  PyObjectPtr left(mainModuleGet("left"));
  PyObjectPtr right(PyLong_FromLong(42));
  EXPECT_EQ(PySequence_InPlaceConcat(left, right), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceInPlaceConcatCallsDunderIadd) {
  PyRun_SimpleString(R"(
class C(list):
  def __add__(self, other):
    return 1
  def __iadd__(self, other):
    return 2
left = C()
right = (1, 2, 3)
)");
  PyObjectPtr left(mainModuleGet("left"));
  PyObjectPtr right(mainModuleGet("right"));
  PyObjectPtr result(PySequence_InPlaceConcat(left, right));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 2);
}

TEST_F(AbstractExtensionApiTest, PySequenceInPlaceConcatCallsDunderAdd) {
  PyRun_SimpleString(R"(
class C(tuple):
  def __add__(self, other):
    return 1
left = C()
right = (1, 2, 3)
)");
  PyObjectPtr left(mainModuleGet("left"));
  PyObjectPtr right(mainModuleGet("right"));
  PyObjectPtr result(PySequence_InPlaceConcat(left, right));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceInPlaceRepeatWithNullRaisesSystemError) {
  EXPECT_EQ(PySequence_InPlaceRepeat(nullptr, 0), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceInPlaceRepeatWithoutDunderGetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C: pass
obj = C()
)");
  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PySequence_InPlaceRepeat(obj, 42), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceInPlaceRepeatWithTupleReturnsTuple) {
  PyObjectPtr obj(Py_BuildValue("(ii)", 0, 1));
  ASSERT_EQ(PyTuple_Size(obj), 2);
  PyObjectPtr result(PySequence_InPlaceRepeat(obj, 3));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyTuple_Size(obj), 2);
  ASSERT_TRUE(PyTuple_CheckExact(result));
  EXPECT_EQ(PyTuple_Size(result), 6);
}

TEST_F(AbstractExtensionApiTest, PySequenceInPlaceRepeatCallsDunderImul) {
  PyRun_SimpleString(R"(
class C(list):
  def __imul__(self, other):
    return 1
  def __mul__(self, other):
    return 2
obj = C()
)");
  PyObjectPtr obj(mainModuleGet("obj"));
  PyObjectPtr result(PySequence_InPlaceRepeat(obj, 0));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);
}

TEST_F(AbstractExtensionApiTest, PySequenceInPlaceRepeatCallsDunderMul) {
  PyRun_SimpleString(R"(
class C(tuple):
  def __mul__(self, other):
    return 1
obj = C()
)");
  PyObjectPtr obj(mainModuleGet("obj"));
  PyObjectPtr result(PySequence_InPlaceRepeat(obj, 0));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyLong_CheckExact(result));
  EXPECT_EQ(PyLong_AsLong(result), 1);
}

TEST_F(AbstractExtensionApiTest, PySequenceLengthOnNull) {
  EXPECT_EQ(PySequence_Length(nullptr), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceLengthWithNonSequenceReturnsValue) {
  PyRun_SimpleString(R"(
class Foo:
  def __len__(self):
    return 1
obj = Foo()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PySequence_Length(obj), 1);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

// PySequence_Length fails on `dict` in CPython, but succeeds on subclasses
TEST_F(AbstractExtensionApiTest,
       PySequenceLengthWithEmptyDictSubclassReturnsZero) {
  PyRun_SimpleString(R"(
class Foo(dict):
  pass
obj = Foo()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  EXPECT_EQ(PySequence_Length(obj), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceLengthWithNonEmptyDictSubclassReturnsValue) {
  PyRun_SimpleString(R"(
class Foo(dict):
  pass
obj = Foo()
)");

  PyObjectPtr obj(mainModuleGet("obj"));
  PyObjectPtr one(PyLong_FromLong(1));
  PyObjectPtr two(PyLong_FromLong(2));

  ASSERT_EQ(PyDict_SetItem(obj, one, two), 0);
  ASSERT_EQ(PyDict_SetItem(obj, two, one), 0);

  EXPECT_EQ(PySequence_Length(obj), 2);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, PySequenceListWithNullSeqRaisesSystemError) {
  ASSERT_EQ(PySequence_List(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceListWithNonIterableRaisesTypeError) {
  ASSERT_EQ(PySequence_List(Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceListReturnsList) {
  PyRun_SimpleString(R"(
class C:
  def __iter__(self):
    return (1, 2, 3).__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_List(c));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyList_CheckExact(result));
  EXPECT_EQ(PyList_Size(result), 3);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceGetSliceWithNullSeqRaisesSystemError) {
  EXPECT_EQ(PySequence_GetSlice(nullptr, 1, 2), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceGetSliceWithNonIterableRaisesTypeError) {
  EXPECT_EQ(PySequence_GetSlice(Py_None, 1, 2), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceGetSliceCallsDunderGetItem) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    return 7
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_GetSlice(c, 1, 2));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  ASSERT_TRUE(PyLong_Check(result));
  EXPECT_EQ(PyLong_AsLong(result), 7);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceSetSliceWithNullSeqRaisesSystemError) {
  PyObjectPtr obj(PyList_New(0));
  EXPECT_EQ(PySequence_SetSlice(nullptr, 1, 2, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceSetSliceWithNonIterableRaisesTypeError) {
  PyObjectPtr obj(PyList_New(0));
  EXPECT_EQ(PySequence_SetSlice(Py_None, 1, 2, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceSetSliceCallsDunderSetItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __setitem__(self, key, value):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyList_New(0));
  ASSERT_EQ(PySequence_SetSlice(c, 1, 2, obj), 0);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceSetSliceWithNullObjCallsDunderDelItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __delitem__(self, key):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PySequence_SetSlice(c, 1, 2, nullptr), 0);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest,
       PySequenceDelSliceWithNullSeqRaisesSystemError) {
  EXPECT_EQ(PySequence_DelSlice(nullptr, 1, 2), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceDelSliceWithNonIterableRaisesTypeError) {
  EXPECT_EQ(PySequence_DelSlice(Py_None, 1, 2), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceDelSliceCallsDunderDelItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __delitem__(self, key):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PySequence_DelSlice(c, 1, 2), 0);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest, ObjectDelItemWithNullObjRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_DelItem(nullptr, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, ObjectDelItemWithNullKeyRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_DelItem(obj, nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, ObjectDelItemCallsDunderDelItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __delitem__(self, key):
    global sideeffect
    sideeffect = 10

c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  EXPECT_EQ(PyObject_DelItem(c, key), 0);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest, ObjectDelItemPropagatesDelItemException) {
  PyRun_SimpleString(R"(
class C:
  def __delitem__(self, key):
    raise TypeError

c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  EXPECT_EQ(PyObject_DelItem(c, key), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectDelItemStringWithNullObjRaisesSystemError) {
  EXPECT_EQ(PyObject_DelItemString(nullptr, "hello"), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectDelItemStringWithNullKeyRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_DelItemString(obj, nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, ObjectDelItemStringCallsDunderDelItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __delitem__(self, key):
    global sideeffect
    sideeffect = 10

c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyObject_DelItemString(c, "hello"), 0);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest,
       ObjectDelItemStringPropagatesDelitemException) {
  PyRun_SimpleString(R"(
class C:
  def __delitem__(self, key):
    raise TypeError

c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyObject_DelItemString(c, "hello"), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceSizeWithNullRaisesSystemError) {
  EXPECT_EQ(PySequence_Size(nullptr), -1);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, PySequenceTupleWithNullSeqRaisesSystemError) {
  EXPECT_EQ(PySequence_Tuple(nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       PySequenceTupleWithNonIterableRaisesTypeError) {
  EXPECT_EQ(PySequence_Tuple(Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, PySequenceTupleReturnsTuple) {
  PyRun_SimpleString(R"(
class C:
  def __iter__(self):
    return [1, 2, 3].__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PySequence_Tuple(c));
  ASSERT_NE(result, nullptr);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyTuple_CheckExact(result));
  EXPECT_EQ(PyTuple_Size(result), 3);
}

TEST_F(AbstractExtensionApiTest, ObjectGetItemWithNullObjRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_GetItem(nullptr, obj), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, ObjectGetItemWithNullKeyRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_GetItem(obj, nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectGetItemWithNoDunderGetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  EXPECT_EQ(PyObject_GetItem(c, key), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectGetItemWithUncallableDunderGetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  __getitem__ = 4
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  EXPECT_EQ(PyObject_GetItem(c, key), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, ObjectGetItemCallsDunderGetItem) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    return key
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  PyObjectPtr result(PyObject_GetItem(c, key));
  EXPECT_EQ(result, key);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, ObjectGetItemPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    raise IndexError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  EXPECT_EQ(PyObject_GetItem(c, key), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_IndexError));
}

TEST_F(AbstractExtensionApiTest,
       MappingGetItemStringWithNullObjRaisesSystemError) {
  EXPECT_EQ(PyMapping_GetItemString(nullptr, "hello"), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       MappingGetItemStringWithNullKeyRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyMapping_GetItemString(obj, nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       MappingGetItemStringWithNoDunderGetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_GetItemString(c, "hello"), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       MappingGetItemStringWithUncallableDunderGetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  __getitem__ = 4
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_GetItemString(c, "hello"), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, MappingGetItemStringCallsDunderGetItem) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    return key
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  const char* key = "hello";
  PyObjectPtr result(PyMapping_GetItemString(c, key));
  EXPECT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(isUnicodeEqualsCStr(result, key));
}

TEST_F(AbstractExtensionApiTest, MappingGetItemStringPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    raise IndexError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_GetItemString(c, "hello"), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_IndexError));
}

TEST_F(AbstractExtensionApiTest, MappingHasKeyWithNullObjReturnsFalse) {
  PyObjectPtr obj(PyLong_FromLong(7));
  EXPECT_EQ(PyMapping_HasKey(nullptr, obj), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, MappingHasKeyWithNullKeyReturnsFalse) {
  PyObjectPtr obj(PyLong_FromLong(7));
  EXPECT_EQ(PyMapping_HasKey(obj, nullptr), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, MappingHasKeyCallsDunderGetItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __getitem__(self, key):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  ASSERT_EQ(PyMapping_HasKey(c, key), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest,
       MappingHasKeyReturnsFalseWhenExceptionIsRaised) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    raise IndexError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr key(PyLong_FromLong(7));
  EXPECT_EQ(PyMapping_HasKey(c, key), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, MappingHasKeyStringWithNullObjReturnsFalse) {
  EXPECT_EQ(PyMapping_HasKeyString(nullptr, "hello"), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, MappingHasKeyStringWithNullKeyReturnsFalse) {
  PyObjectPtr obj(PyLong_FromLong(7));
  EXPECT_EQ(PyMapping_HasKeyString(obj, nullptr), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, MappingHasKeyStringCallsDunderGetItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __getitem__(self, key):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  ASSERT_EQ(PyMapping_HasKeyString(c, "hello"), 1);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest,
       MappingHasKeyStringReturnsFalseWhenExceptionIsRaised) {
  PyRun_SimpleString(R"(
class C:
  def __getitem__(self, key):
    raise IndexError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_HasKeyString(c, "hello"), 0);
  EXPECT_EQ(PyErr_Occurred(), nullptr);
}

TEST_F(AbstractExtensionApiTest, MappingKeysWithNoKeysRaisesAttributeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_Keys(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_AttributeError));
}

TEST_F(AbstractExtensionApiTest, MappingKeysCallsReturnsListOfKeys) {
  PyRun_SimpleString(R"(
class C:
  def keys(self):
    return ["hello", "world"]
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Keys(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, MappingKeysCallsReturnsListOfKeysSequence) {
  PyRun_SimpleString(R"(
class C:
  def keys(self):
    return ("hello", "world").__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Keys(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, MappingKeysWithDictSubclassCallsKeys) {
  PyRun_SimpleString(R"(
class C(dict):
  def keys(self):
    return ("hello", "world").__iter__()
c = C()
c["a"] = 1
c["b"] = 2
c["c"] = 3
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Keys(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, MappingItemsWithNoItemsRaisesAttributeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_Items(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_AttributeError));
}

TEST_F(AbstractExtensionApiTest, MappingItemsCallsReturnsListOfItems) {
  PyRun_SimpleString(R"(
class C:
  def items(self):
    return ["hello", "world"]
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Items(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, MappingItemsCallsReturnsListOfItemsSequence) {
  PyRun_SimpleString(R"(
class C:
  def items(self):
    return ("hello", "world").__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Items(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, MappingItemsWithDictSubclassCallsItems) {
  PyRun_SimpleString(R"(
class C(dict):
  def items(self):
    return ("hello", "world").__iter__()
c = C()
c["a"] = 1
c["b"] = 2
c["c"] = 3
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Items(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest,
       MappingValuesWithNoValuesRaisesAttributeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyMapping_Values(c), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_AttributeError));
}

TEST_F(AbstractExtensionApiTest, MappingValuesCallsReturnsListOfValues) {
  PyRun_SimpleString(R"(
class C:
  def values(self):
    return ["hello", "world"]
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Values(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest,
       MappingValuesCallsReturnsListOfValuesSequence) {
  PyRun_SimpleString(R"(
class C:
  def values(self):
    return ("hello", "world").__iter__()
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Values(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, MappingValuesWithDictSubclassCallsValues) {
  PyRun_SimpleString(R"(
class C(dict):
  def values(self):
    return ("hello", "world").__iter__()
c = C()
c["a"] = 1
c["b"] = 2
c["c"] = 3
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr result(PyMapping_Values(c));
  ASSERT_NE(result, nullptr);
  ASSERT_TRUE(PyList_Check(result));
  ASSERT_EQ(PyList_Size(result), 2);
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 0), "hello"));
  EXPECT_TRUE(isUnicodeEqualsCStr(PyList_GetItem(result, 1), "world"));
}

TEST_F(AbstractExtensionApiTest, ObjectSetItemWithNullObjRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_SetItem(nullptr, obj, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, ObjectSetItemWithNullKeyRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_SetItem(obj, nullptr, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest, ObjectSetItemWithNullValueRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_SetItem(obj, obj, nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectSetItemWithNoDunderSetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_SetItem(c, obj, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectSetItemWithUncallableDunderSetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  __setitem__ = 4
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyObject_SetItem(c, obj, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, ObjectSetItemCallsDunderSetItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __setitem__(self, key, val):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(1));
  ASSERT_EQ(PyObject_SetItem(c, obj, obj), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest, ObjectSetItemPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __setitem__(self, key, value):
    raise IndexError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(7));
  EXPECT_EQ(PyObject_SetItem(c, obj, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_IndexError));
}

TEST_F(AbstractExtensionApiTest,
       MappingSetItemStringWithNullObjRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyMapping_SetItemString(nullptr, "hello", obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       MappingSetItemStringWithNullKeyRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyMapping_SetItemString(obj, nullptr, obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       MappingSetItemStringWithNullValueRaisesSystemError) {
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyMapping_SetItemString(obj, "hello", nullptr), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_SystemError));
}

TEST_F(AbstractExtensionApiTest,
       MappingSetItemStringWithNoDunderSetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  pass
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyMapping_SetItemString(c, "hello", obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest,
       MappingSetItemStringWithUncallableDunderSetItemRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  __setitem__ = 4
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(1));
  EXPECT_EQ(PyMapping_SetItemString(c, "hello", obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, MappingSetItemStringCallsDunderSetItem) {
  PyRun_SimpleString(R"(
sideeffect = 0
class C:
  def __setitem__(self, key, val):
    global sideeffect
    sideeffect = 10
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(1));
  ASSERT_EQ(PyMapping_SetItemString(c, "hello", obj), 0);
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  PyObjectPtr sideeffect(mainModuleGet("sideeffect"));
  EXPECT_EQ(PyLong_AsLong(sideeffect), 10);
}

TEST_F(AbstractExtensionApiTest, MappingSetItemStringPropagatesException) {
  PyRun_SimpleString(R"(
class C:
  def __setitem__(self, key, value):
    raise IndexError
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr obj(PyLong_FromLong(7));
  EXPECT_EQ(PyMapping_SetItemString(c, "hello", obj), -1);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_IndexError));
}

TEST_F(AbstractExtensionApiTest,
       ObjectFormatWithNonStrFormatSpecRaisesTypeErrorPyro) {
  EXPECT_EQ(PyObject_Format(Py_None, Py_None), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

TEST_F(AbstractExtensionApiTest, ObjectFormatCallsDunderFormat) {
  PyRun_SimpleString(R"(
last_arguments = None
class C:
  def __format__(self, format_spec):
    global last_arguments
    last_arguments = (self, format_spec)
    return "foo"
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  PyObjectPtr fmt(PyUnicode_FromString("foo"));
  PyObjectPtr result(PyObject_Format(c, fmt));
  ASSERT_EQ(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(isUnicodeEqualsCStr(result, "foo"));
  PyObjectPtr last_arguments(mainModuleGet("last_arguments"));
  ASSERT_TRUE(PyTuple_Check(last_arguments));
  EXPECT_EQ(PyTuple_GetItem(last_arguments, 0), c);
  EXPECT_EQ(PyTuple_GetItem(last_arguments, 1), fmt);
}

TEST_F(AbstractExtensionApiTest,
       ObjectFormatWithDunderFormatReturningNonStrRaisesTypeError) {
  PyRun_SimpleString(R"(
class C:
  def __format__(self, format_spec):
    return 7
c = C()
)");
  PyObjectPtr c(mainModuleGet("c"));
  EXPECT_EQ(PyObject_Format(c, nullptr), nullptr);
  ASSERT_NE(PyErr_Occurred(), nullptr);
  EXPECT_TRUE(PyErr_ExceptionMatches(PyExc_TypeError));
}

}  // namespace testing
}  // namespace py