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<?php

namespace Drupal\Tests\Core\Form;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\Form\FormState;
use Drupal\Core\Routing\UrlGeneratorInterface;
use Drupal\Core\Url;
use Drupal\Core\Utility\UnroutedUrlAssemblerInterface;
use Drupal\Tests\UnitTestCase;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;

/**
 * @coversDefaultClass \Drupal\Core\Form\FormSubmitter
 * @group Form
 */
class FormSubmitterTest extends UnitTestCase {

  /**
   * The mocked URL generator.
   *
   * @var \PHPUnit_Framework_MockObject_MockObject|\Drupal\Core\Routing\UrlGeneratorInterface
   */
  protected $urlGenerator;

  /**
   * The mocked unrouted URL assembler.
   *
   * @var \PHPUnit_Framework_MockObject_MockObject|\Drupal\Core\Utility\UnroutedUrlAssemblerInterface
   */
  protected $unroutedUrlAssembler;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();
    $this->urlGenerator = $this->getMock(UrlGeneratorInterface::class);
    $this->unroutedUrlAssembler = $this->getMock(UnroutedUrlAssemblerInterface::class);
  }

  /**
   * @covers ::doSubmitForm
   */
  public function testHandleFormSubmissionNotSubmitted() {
    $form_submitter = $this->getFormSubmitter();
    $form = [];
    $form_state = new FormState();

    $return = $form_submitter->doSubmitForm($form, $form_state);
    $this->assertFalse($form_state->isExecuted());
    $this->assertNull($return);
  }

  /**
   * @covers ::doSubmitForm
   */
  public function testHandleFormSubmissionNoRedirect() {
    $form_submitter = $this->getFormSubmitter();
    $form = [];
    $form_state = (new FormState())
      ->setSubmitted()
      ->disableRedirect();

    $return = $form_submitter->doSubmitForm($form, $form_state);
    $this->assertTrue($form_state->isExecuted());
    $this->assertNull($return);
  }

  /**
   * @covers ::doSubmitForm
   *
   * @dataProvider providerTestHandleFormSubmissionWithResponses
   */
  public function testHandleFormSubmissionWithResponses($class, $form_state_key) {
    $response = $this->getMockBuilder($class)
      ->disableOriginalConstructor()
      ->getMock();
    $response->expects($this->any())
      ->method('prepare')
      ->will($this->returnValue($response));

    $form_state = (new FormState())
      ->setSubmitted()
      ->setFormState([$form_state_key => $response]);

    $form_submitter = $this->getFormSubmitter();
    $form = [];
    $return = $form_submitter->doSubmitForm($form, $form_state);

    $this->assertInstanceOf('Symfony\Component\HttpFoundation\Response', $return);
  }

  public function providerTestHandleFormSubmissionWithResponses() {
    return [
      ['Symfony\Component\HttpFoundation\Response', 'response'],
      ['Symfony\Component\HttpFoundation\RedirectResponse', 'redirect'],
    ];
  }

  /**
   * Tests the redirectForm() method when the redirect is NULL.
   *
   * @covers ::redirectForm
   */
  public function testRedirectWithNull() {
    $form_submitter = $this->getFormSubmitter();

    $form_state = $this->getMock('Drupal\Core\Form\FormStateInterface');
    $form_state->expects($this->once())
      ->method('getRedirect')
      ->willReturn(NULL);

    $this->urlGenerator->expects($this->once())
      ->method('generateFromRoute')
      ->with('<current>', [], ['query' => [], 'absolute' => TRUE])
      ->willReturn('http://localhost/test-path');

    $redirect = $form_submitter->redirectForm($form_state);
    // If we have no redirect, we redirect to the current URL.
    $this->assertSame('http://localhost/test-path', $redirect->getTargetUrl());
    $this->assertSame(303, $redirect->getStatusCode());
  }

  /**
   * Tests redirectForm() when a redirect is a Url object.
   *
   * @covers ::redirectForm
   *
   * @dataProvider providerTestRedirectWithUrl
   */
  public function testRedirectWithUrl(Url $redirect_value, $result, $status = 303) {
    $container = new ContainerBuilder();
    $container->set('url_generator', $this->urlGenerator);
    \Drupal::setContainer($container);
    $form_submitter = $this->getFormSubmitter();
    $this->urlGenerator->expects($this->once())
      ->method('generateFromRoute')
      ->will($this->returnValueMap([
          ['test_route_a', [], ['absolute' => TRUE], FALSE, 'test-route'],
          ['test_route_b', ['key' => 'value'], ['absolute' => TRUE], FALSE, 'test-route/value'],
        ])
      );

    $form_state = $this->getMock('Drupal\Core\Form\FormStateInterface');
    $form_state->expects($this->once())
      ->method('getRedirect')
      ->willReturn($redirect_value);
    $redirect = $form_submitter->redirectForm($form_state);
    $this->assertSame($result, $redirect->getTargetUrl());
    $this->assertSame($status, $redirect->getStatusCode());
  }

  /**
   * Provides test data for testing the redirectForm() method with a route name.
   *
   * @return array
   *   Returns some test data.
   */
  public function providerTestRedirectWithUrl() {
    return [
      [new Url('test_route_a', [], ['absolute' => TRUE]), 'test-route'],
      [new Url('test_route_b', ['key' => 'value'], ['absolute' => TRUE]), 'test-route/value'],
    ];
  }

  /**
   * Tests the redirectForm() method with a response object.
   *
   * @covers ::redirectForm
   */
  public function testRedirectWithResponseObject() {
    $form_submitter = $this->getFormSubmitter();
    $redirect = new RedirectResponse('/example');
    $form_state = $this->getMock('Drupal\Core\Form\FormStateInterface');
    $form_state->expects($this->once())
      ->method('getRedirect')
      ->willReturn($redirect);

    $result_redirect = $form_submitter->redirectForm($form_state);

    $this->assertSame($redirect, $result_redirect);
  }

  /**
   * Tests the redirectForm() method when no redirect is expected.
   *
   * @covers ::redirectForm
   */
  public function testRedirectWithoutResult() {
    $form_submitter = $this->getFormSubmitter();
    $this->urlGenerator->expects($this->never())
      ->method('generateFromRoute');
    $this->unroutedUrlAssembler->expects($this->never())
      ->method('assemble');
    $container = new ContainerBuilder();
    $container->set('url_generator', $this->urlGenerator);
    $container->set('unrouted_url_assembler', $this->unroutedUrlAssembler);
    \Drupal::setContainer($container);
    $form_state = $this->getMock('Drupal\Core\Form\FormStateInterface');
    $form_state->expects($this->once())
      ->method('getRedirect')
      ->willReturn(FALSE);
    $redirect = $form_submitter->redirectForm($form_state);
    $this->assertNull($redirect);
  }

  /**
   * @covers ::executeSubmitHandlers
   */
  public function testExecuteSubmitHandlers() {
    $form_submitter = $this->getFormSubmitter();
    $mock = $this->getMockForAbstractClass('Drupal\Core\Form\FormBase', [], '', TRUE, TRUE, TRUE, ['submit_handler', 'hash_submit', 'simple_string_submit']);
    $mock->expects($this->once())
      ->method('submit_handler')
      ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'));
    $mock->expects($this->once())
      ->method('hash_submit')
      ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'));
    $mock->expects($this->once())
      ->method('simple_string_submit')
      ->with($this->isType('array'), $this->isInstanceOf('Drupal\Core\Form\FormStateInterface'));

    $form = [];
    $form_state = new FormState();
    $form_submitter->executeSubmitHandlers($form, $form_state);

    $form['#submit'][] = [$mock, 'hash_submit'];
    $form_submitter->executeSubmitHandlers($form, $form_state);

    // $form_state submit handlers will supersede $form handlers.
    $form_state->setSubmitHandlers([[$mock, 'submit_handler']]);
    $form_submitter->executeSubmitHandlers($form, $form_state);

    // Methods directly on the form object can be specified as a string.
    $form_state = (new FormState())
      ->setFormObject($mock)
      ->setSubmitHandlers(['::simple_string_submit']);
    $form_submitter->executeSubmitHandlers($form, $form_state);
  }

  /**
   * @return \Drupal\Core\Form\FormSubmitterInterface
   */
  protected function getFormSubmitter() {
    $request_stack = new RequestStack();
    $request_stack->push(Request::create('/test-path'));
    return $this->getMockBuilder('Drupal\Core\Form\FormSubmitter')
      ->setConstructorArgs([$request_stack, $this->urlGenerator])
      ->setMethods(['batchGet', 'drupalInstallationAttempted'])
      ->getMock();
  }

}