public function testValidateDataDoesNotWalkScalars()
 {
     $graphWalker = $this->createMockGraphWalker();
     $metadataFactory = $this->createMockMetadataFactory();
     $context = new ExecutionContext('Root', $graphWalker, $metadataFactory);
     $valueTransformer = $this->createMockTransformer();
     $form = new Form('author', array('value_transformer' => $valueTransformer));
     $graphWalker->expects($this->never())->method('walkReference');
     $valueTransformer->expects($this->atLeastOnce())->method('reverseTransform')->will($this->returnValue('foobar'));
     $form->submit(array('foo' => 'bar'));
     // reverse transformed to "foobar"
     $form->validateData($context);
 }