/**
* @test
*/
public function setClassMetadataExtensionClassValidateResult()
{
$classMetadataExtensionClass = '\\DateTime';
$result = $this->classMetadata->setClassMetadataExtensionClass($classMetadataExtensionClass);
$this->assertSame($this->classMetadata, $result);
$this->assertEquals($classMetadataExtensionClass, $this->classMetadata->getClassMetadataExtensionClass());
}