public function testValidateProperty() {
$entity = new Entity();
$metadata = new ClassMetadata(get_class($entity));
$metadata
->addPropertyConstraint('firstName', new FailingConstraint());
$this->metadataFactory
->addMetadata($metadata);
$result = $this->validator
->validateProperty($entity, 'firstName');
$this
->assertCount(1, $result);
$result = $this->validator
->validateProperty($entity, 'lastName');
$this
->assertCount(0, $result);
}