in later/unittest/backport/mock.py [0:0]
def assert_any_await(self, *args, **kwargs):
"""
Assert the mock has ever been awaited with the specified arguments.
"""
expected = self._call_matcher(_Call((args, kwargs), two=True))
cause = expected if isinstance(expected, Exception) else None
actual = [self._call_matcher(c) for c in self.await_args_list]
if cause or expected not in _AnyComparer(actual):
expected_string = self._format_mock_call_signature(args, kwargs)
raise AssertionError(
'%s await not found' % expected_string
) from cause