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<?php

namespace Drupal\Tests\tour\Functional;

use Drupal\Tests\BrowserTestBase;

/**
 * Verifies help page display of tours.
 *
 * @group help
 */
class TourHelpPageTest extends BrowserTestBase {

  /**
   * Modules to enable, including some providing tours.
   *
   * @var array
   */
  public static $modules = ['help', 'tour', 'locale', 'language'];

  /**
   * User that can access tours and help.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $tourUser;

  /**
   * A user who can access help but not tours.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $noTourUser;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();

    // Create users. For the Tour user, include permissions for the language
    // tours' parent pages, but not the translation tour's parent page. See
    // self:getTourList().
    $this->tourUser = $this->drupalCreateUser(['access administration pages', 'access tour', 'administer languages']);
    $this->noTourUser = $this->drupalCreateUser(['access administration pages']);
  }

  /**
   * Logs in users, tests help pages.
   */
  public function testHelp() {
    $this->drupalLogin($this->tourUser);
    $this->verifyHelp();

    $this->drupalLogin($this->noTourUser);
    $this->verifyHelp(FALSE);
  }

  /**
   * Verifies the logged in user has access to the help properly.
   *
   * @param bool $tours_ok
   *   (optional) TRUE (default) if the user should see tours, FALSE if not.
   */
  protected function verifyHelp($tours_ok = TRUE) {
    $this->drupalGet('admin/help');

    // All users should be able to see the module section.
    $this->assertText('Module overviews are provided by modules');
    foreach ($this->getModuleList() as $name) {
      $this->assertLink($name);
    }

    // Some users should be able to see the tour section.
    if ($tours_ok) {
      $this->assertText('Tours guide you through workflows');
    }
    else {
      $this->assertNoText('Tours guide you through workflows');
    }

    $titles = $this->getTourList();

    // Test the titles that should be links.
    foreach ($titles[0] as $title) {
      if ($tours_ok) {
        $this->assertLink($title);
      }
      else {
        $this->assertNoLink($title);
        // Just test the first item in the list of links that should not
        // be there, because the second matches the name of a module that is
        // in the Module overviews section, so the link will be there and
        // this test will fail. Testing one should be sufficient to verify
        // the page is working correctly.
        break;
      }
    }

    // Test the titles that should not be links.
    foreach ($titles[1] as $title) {
      if ($tours_ok) {
        $this->assertText($title);
        $this->assertSession()->linkNotExistsExact($title);
      }
      else {
        $this->assertNoText($title);
        // Just test the first item in the list of text that should not
        // be there, because the second matches part of the name of a module
        // that is in the Module overviews section, so the text will be there
        // and this test will fail. Testing one should be sufficient to verify
        // the page is working correctly.
        break;
      }
    }
  }

  /**
   * Gets a list of modules to test for hook_help() pages.
   *
   * @return array
   *   A list of module names to test.
   */
  protected function getModuleList() {
    return ['Help', 'Tour'];
  }

  /**
   * Gets a list of tours to test.
   *
   * @return array
   *   A list of tour titles to test. The first array element is a list of tours
   *   with links, and the second is a list of tours without links. Assumes
   *   that the user being tested has 'administer languages' permission but
   *   not 'translate interface'.
   */
  protected function getTourList() {
    return [['Adding languages', 'Language'], ['Editing languages', 'Translation']];
  }

}