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<?php

namespace Drupal\FunctionalJavascriptTests\Ajax;

use Drupal\FunctionalJavascriptTests\WebDriverTestBase;

/**
 * Tests adding messages via AJAX command.
 *
 * @group Ajax
 */
class MessageCommandTest extends WebDriverTestBase {

  /**
   * {@inheritdoc}
   */
  protected static $modules = ['ajax_test'];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  /**
   * Test AJAX MessageCommand use in a form.
   */
  public function testMessageCommand() {
    $page = $this->getSession()->getPage();
    $assert_session = $this->assertSession();

    $this->drupalGet('ajax-test/message');
    $page->pressButton('Make Message In Default Location');
    $this->waitForMessageVisible('I am a message in the default location.');
    $this->assertAnnounceContains('I am a message in the default location.');
    $assert_session->elementsCount('css', '.messages__wrapper .messages', 1);

    $page->pressButton('Make Message In Alternate Location');
    $this->waitForMessageVisible('I am a message in an alternate location.', '#alternate-message-container');
    $assert_session->pageTextContains('I am a message in the default location.');
    $this->assertAnnounceContains('I am a message in an alternate location.');
    $assert_session->elementsCount('css', '.messages__wrapper .messages', 1);
    $assert_session->elementsCount('css', '#alternate-message-container .messages', 1);

    $page->pressButton('Make Warning Message');
    $this->waitForMessageVisible('I am a warning message in the default location.', NULL, 'warning');
    $assert_session->pageTextNotContains('I am a message in the default location.');
    $assert_session->elementsCount('css', '.messages__wrapper .messages', 1);
    $assert_session->elementsCount('css', '#alternate-message-container .messages', 1);

    $this->drupalGet('ajax-test/message');
    // Test that by default, previous messages in a location are removed.
    for ($i = 0; $i < 6; $i++) {
      $page->pressButton('Make Message In Default Location');
      $this->waitForMessageVisible('I am a message in the default location.');
      $assert_session->elementsCount('css', '.messages__wrapper .messages', 1);

      $page->pressButton('Make Warning Message');
      $this->waitForMessageVisible('I am a warning message in the default location.', NULL, 'warning');
      // Test that setting MessageCommand::$option['announce'] => '' supresses
      // screen reader announcement.
      $this->assertAnnounceNotContains('I am a warning message in the default location.');
      $this->waitForMessageRemoved('I am a message in the default location.');
      $assert_session->elementsCount('css', '.messages__wrapper .messages', 1);
    }

    // Test that if MessageCommand::clearPrevious is FALSE, messages will not
    // be cleared.
    $this->drupalGet('ajax-test/message');
    for ($i = 1; $i < 7; $i++) {
      $page->pressButton('Make Message In Alternate Location');
      $expected_count = $page->waitFor(10, function () use ($i, $page) {
        return count($page->findAll('css', '#alternate-message-container .messages')) === $i;
      });
      $this->assertTrue($expected_count);
      $this->assertAnnounceContains('I am a message in an alternate location.');
    }
  }

  /**
   * Asserts that a message of the expected type appears.
   *
   * @param string $message
   *   The expected message.
   * @param string $selector
   *   The selector for the element in which to check for the expected message.
   * @param string $type
   *   The expected type.
   */
  protected function waitForMessageVisible($message, $selector = '[data-drupal-messages]', $type = 'status') {
    $this->assertNotEmpty($this->assertSession()->waitForElementVisible('css', $selector . ' .messages--' . $type . ':contains("' . $message . '")'));
  }

  /**
   * Asserts that a message of the expected type is removed.
   *
   * @param string $message
   *   The expected message.
   * @param string $selector
   *   The selector for the element in which to check for the expected message.
   * @param string $type
   *   The expected type.
   */
  protected function waitForMessageRemoved($message, $selector = '[data-drupal-messages]', $type = 'status') {
    $this->assertNotEmpty($this->assertSession()->waitForElementRemoved('css', $selector . ' .messages--' . $type . ':contains("' . $message . '")'));
  }

  /**
   * Checks for inclusion of text in #drupal-live-announce.
   *
   * @param string $expected_message
   *   The text expected to be present in #drupal-live-announce.
   */
  protected function assertAnnounceContains($expected_message) {
    $assert_session = $this->assertSession();
    $this->assertNotEmpty($assert_session->waitForElement('css', "#drupal-live-announce:contains('$expected_message')"));
  }

  /**
   * Checks for absence of the given text from #drupal-live-announce.
   *
   * @param string $expected_message
   *   The text expected to be absent from #drupal-live-announce.
   */
  protected function assertAnnounceNotContains($expected_message) {
    $assert_session = $this->assertSession();
    $this->assertEmpty($assert_session->waitForElement('css', "#drupal-live-announce:contains('$expected_message')", 1000));
  }

}