public function assertSubset()

in src/Assert.hack [528:565]

• 29 lines of code
• 6 McCabe index (conditional complexity)

  public function assertSubset(
    dynamic $expected,
    dynamic $actual,
    string $msg = '',
    string $path = '$actual',
  ): void {
    // This is very not-Hack like.
    // $expected is (object | KeyedTraversable<mixed, mixed>)
    foreach ($expected as $key => $value) {
      if ($actual is KeyedContainer<_, _>) {
        // $key is mixed, so `?as arraykey` can fail (to null)
        // This makes `$actual_value` null as well...
        $actual_value = idx($actual, $key ?as arraykey);
        $part = '['.\var_export($key, true).']';
      } else if (\is_object($actual)) {
        // stdClass can have integer-like object properties.
        // Indexing them with $actual->$int_one` is very weird, but okay.
        // Indexing them with float, bool something that coerces, is a bug in your test.
        // Let's fail loudly instead of silently depending on implicit casts.
        invariant(
          $key is arraykey,
          'Attempting to access an object property with a %s name',
          \gettype($key),
        );
        $actual_value = /* HH_FIXME[2011] Dynamic property access */ $actual->$key;
        $part = '->'.$key;
      } else {
        $actual_value = null;
        $part = '';
      }

      if (is_any_array($value) || \is_object($value)) {
        $this->assertSubset($value, $actual_value, $msg, $path.$part);
      } else {
        $this->assertEquals($value, $actual_value, $msg."\nKey: ".$path.$part);
      }
    }
  }