public function doMappingReturnsSourceUnchangedIfAlreadyConverted()
{
$source = new \ArrayObject();
$targetType = 'ArrayObject';
$propertyPath = '';
$propertyMapper = $this->getAccessibleMock(PropertyMapper::class, ['dummy']);
$this->assertSame($source, $propertyMapper->_callRef('doMapping', $source, $targetType, $this->mockConfiguration, $propertyPath));
}