--- /dev/null
+<?php
+
+namespace Drupal\Tests\system\Functional\Form;
+
+use Drupal\system\Tests\System\SystemConfigFormTestBase;
+use Drupal\form_test\FormTestObject;
+
+/**
+ * Tests building a form from an object.
+ *
+ * @group Form
+ */
+class FormObjectTest extends SystemConfigFormTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['form_test'];
+
+ protected function setUp() {
+ parent::setUp();
+
+ $this->form = new FormTestObject($this->container->get('config.factory'));
+ $this->values = [
+ 'bananas' => [
+ '#value' => $this->randomString(10),
+ '#config_name' => 'form_test.object',
+ '#config_key' => 'bananas',
+ ],
+ ];
+ }
+
+ /**
+ * Tests using an object as the form callback.
+ *
+ * @see \Drupal\form_test\EventSubscriber\FormTestEventSubscriber::onKernelRequest()
+ */
+ public function testObjectFormCallback() {
+ $config_factory = $this->container->get('config.factory');
+
+ $this->drupalGet('form-test/object-builder');
+ $this->assertText('The FormTestObject::buildForm() method was used for this form.');
+ $elements = $this->xpath('//form[@id="form-test-form-test-object"]');
+ $this->assertTrue(!empty($elements), 'The correct form ID was used.');
+ $this->drupalPostForm(NULL, ['bananas' => 'green'], t('Save'));
+ $this->assertText('The FormTestObject::validateForm() method was used for this form.');
+ $this->assertText('The FormTestObject::submitForm() method was used for this form.');
+ $value = $config_factory->get('form_test.object')->get('bananas');
+ $this->assertIdentical('green', $value);
+
+ $this->drupalGet('form-test/object-arguments-builder/yellow');
+ $this->assertText('The FormTestArgumentsObject::buildForm() method was used for this form.');
+ $elements = $this->xpath('//form[@id="form-test-form-test-arguments-object"]');
+ $this->assertTrue(!empty($elements), 'The correct form ID was used.');
+ $this->drupalPostForm(NULL, NULL, t('Save'));
+ $this->assertText('The FormTestArgumentsObject::validateForm() method was used for this form.');
+ $this->assertText('The FormTestArgumentsObject::submitForm() method was used for this form.');
+ $value = $config_factory->get('form_test.object')->get('bananas');
+ $this->assertIdentical('yellow', $value);
+
+ $this->drupalGet('form-test/object-service-builder');
+ $this->assertText('The FormTestServiceObject::buildForm() method was used for this form.');
+ $elements = $this->xpath('//form[@id="form-test-form-test-service-object"]');
+ $this->assertTrue(!empty($elements), 'The correct form ID was used.');
+ $this->drupalPostForm(NULL, ['bananas' => 'brown'], t('Save'));
+ $this->assertText('The FormTestServiceObject::validateForm() method was used for this form.');
+ $this->assertText('The FormTestServiceObject::submitForm() method was used for this form.');
+ $value = $config_factory->get('form_test.object')->get('bananas');
+ $this->assertIdentical('brown', $value);
+
+ $this->drupalGet('form-test/object-controller-builder');
+ $this->assertText('The FormTestControllerObject::create() method was used for this form.');
+ $this->assertText('The FormTestControllerObject::buildForm() method was used for this form.');
+ $elements = $this->xpath('//form[@id="form-test-form-test-controller-object"]');
+ $this->assertTrue(!empty($elements), 'The correct form ID was used.');
+ $this->assertText('custom_value', 'Ensure parameters are injected from request attributes.');
+ $this->assertText('request_value', 'Ensure the request object is injected.');
+ $this->drupalPostForm(NULL, ['bananas' => 'black'], t('Save'));
+ $this->assertText('The FormTestControllerObject::validateForm() method was used for this form.');
+ $this->assertText('The FormTestControllerObject::submitForm() method was used for this form.');
+ $value = $config_factory->get('form_test.object')->get('bananas');
+ $this->assertIdentical('black', $value);
+ }
+
+}