public function testGetFieldDefinitionFailure()
{
$contentType = new ContentType($this->contentTypeServiceMock, array('fieldDefinitionListReference' => '/content/types/23/fieldDefinitions'));
$contentTypeServiceMock = $this->contentTypeServiceMock;
$contentTypeServiceMock->expects($this->once())->method('loadFieldDefinitionList')->with($this->equalTo('/content/types/23/fieldDefinitions'))->will($this->returnValue($this->getFieldDefinitionListMock()));
$this->assertEquals(null, $contentType->getFieldDefinition('non-existent'));
}