[Form] Failing test for empty_data option BC break

This demonstrates the issue described in symfony/symfony#3354. FieldType no longer has access to the child type's data_class option, which makes it unable to create the default closure for empty_data.

src/Symfony/Component/Form/Tests/Fixtures/AuthorType.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Symfony\Component\Form\Tests\Fixtures;
+
+use Symfony\Component\Form\FormInterface;
+
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilder;
+
+class AuthorType extends AbstractType
+{
+    public function buildForm(FormBuilder $builder, array $options)
+    {
+        $builder
+            ->add('firstName')
+            ->add('lastName')
+        ;
+    }
+
+    public function getName()
+    {
+        return 'author';
+    }
+
+    public function getDefaultOptions()
+    {
+        return array(
+            'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
+        );
+    }
+}

src/Symfony/Component/Form/Tests/FormFactoryTest.php

@@ -16,6 +16,8 @@ use Symfony\Component\Form\FormFactory;
 use Symfony\Component\Form\Guess\Guess;
 use Symfony\Component\Form\Guess\ValueGuess;
 use Symfony\Component\Form\Guess\TypeGuess;
+use Symfony\Component\Form\Tests\Fixtures\Author;
+use Symfony\Component\Form\Tests\Fixtures\AuthorType;
 use Symfony\Component\Form\Tests\Fixtures\TestExtension;
 use Symfony\Component\Form\Tests\Fixtures\FooType;
 use Symfony\Component\Form\Tests\Fixtures\FooTypeBarExtension;
@@ -539,6 +541,20 @@ class FormFactoryTest extends \PHPUnit_Framework_TestCase
         $factory->createNamedBuilder($type, "text", "value", array("unknown" => "opt"));
     }
 
+    public function testFieldTypeCreatesDefaultValueForEmptyDataOption()
+    {
+        $factory = new FormFactory(array(new \Symfony\Component\Form\Extension\Core\CoreExtension()));
+
+        $form = $factory->createNamedBuilder(new AuthorType(), 'author')->getForm();
+        $form->bind(array('firstName' => 'John', 'lastName' => 'Smith'));
+
+        $author = new Author();
+        $author->firstName = 'John';
+        $author->setLastName('Smith');
+
+        $this->assertEquals($author, $form->getData());
+    }
+
     private function createMockFactory(array $methods = array())
     {
         return $this->getMockBuilder('Symfony\Component\Form\FormFactory')