class PaginationAJAXTest

class PaginationAJAXTest extends WebDriverTestBase {
  use ContentTypeCreationTrait;
  use NodeCreationTrait;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'node',
    'views',
    'views_test_config',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * @var array
   * Test Views to enable.
   */
  public static $testViews = [
    'test_content_ajax',
  ];
  protected $user;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    ViewTestData::createTestViews(self::class, [
      'views_test_config',
    ]);
    // Create a Content type and eleven test nodes.
    $this->createContentType([
      'type' => 'page',
    ]);
    for ($i = 1; $i <= 11; $i++) {
      $this->createNode([
        'title' => 'Node ' . $i . ' content',
        'changed' => $i * 1000,
      ]);
    }
    // Create a user privileged enough to view content.
    $user = $this->drupalCreateUser([
      'administer site configuration',
      'access content',
      'access content overview',
    ]);
    $this->drupalLogin($user);
  }
  
  /**
   * Tests if pagination via AJAX works for the "Content" View.
   */
  public function testBasicPagination() {
    // Visit the content page.
    $this->drupalGet('test-content-ajax');
    $session_assert = $this->assertSession();
    $page = $this->getSession()
      ->getPage();
    $settings = $this->getDrupalSettings();
    // Make sure that the view_path is set correctly.
    $expected_view_path = '/test-content-ajax';
    $this->assertEquals($expected_view_path, current($settings['views']['ajaxViews'])['view_path']);
    // Set the number of items displayed per page to 5 using the exposed pager.
    $page->selectFieldOption('edit-items-per-page', 5);
    $page->pressButton('Filter');
    $session_assert->assertWaitOnAjaxRequest();
    // Change 'Updated' sorting from descending to ascending.
    $page->clickLink('Updated');
    $session_assert->assertWaitOnAjaxRequest();
    // Use the pager by clicking on the links and test if we see the expected
    // number of rows on each page. For easy targeting the titles of the pager
    // links are used.
    /** @var \Behat\Mink\Element\NodeElement[] $rows */
    $rows = $page->findAll('css', 'tbody tr');
    $this->assertCount(5, $rows);
    $this->assertStringContainsString('Node 1 content', $rows[0]->getHtml());
    $this->clickLink('Go to page 2');
    $session_assert->assertWaitOnAjaxRequest();
    $rows = $page->findAll('css', 'tbody tr');
    $this->assertCount(5, $rows);
    $this->assertStringContainsString('Node 6 content', $rows[0]->getHtml());
    $link = $page->findLink('Go to page 3');
    // Test that no unwanted parameters are added to the URL.
    $this->assertEquals('?status=All&type=All&langcode=All&items_per_page=5&order=changed&sort=asc&page=2', $link->getAttribute('href'));
    $this->assertNoDuplicateAssetsOnPage();
    $this->clickLink('Go to page 3');
    $session_assert->assertWaitOnAjaxRequest();
    $rows = $page->findAll('css', 'tbody tr');
    $this->assertCount(1, $rows);
    $this->assertStringContainsString('Node 11 content', $rows[0]->getHtml());
    // Navigate back to the first page.
    $this->clickLink('Go to first page');
    $session_assert->assertWaitOnAjaxRequest();
    $rows = $page->findAll('css', 'tbody tr');
    $this->assertCount(5, $rows);
    $this->assertStringContainsString('Node 1 content', $rows[0]->getHtml());
    // Navigate using the 'next' link.
    $this->clickLink('Go to next page');
    $session_assert->assertWaitOnAjaxRequest();
    $rows = $page->findAll('css', 'tbody tr');
    $this->assertCount(5, $rows);
    $this->assertStringContainsString('Node 6 content', $rows[0]->getHtml());
    // Navigate using the 'last' link.
    $this->clickLink('Go to last page');
    $session_assert->assertWaitOnAjaxRequest();
    $rows = $page->findAll('css', 'tbody tr');
    $this->assertCount(1, $rows);
    $this->assertStringContainsString('Node 11 content', $rows[0]->getHtml());
    // Make sure the AJAX calls don't change the view_path.
    $settings = $this->getDrupalSettings();
    $this->assertEquals($expected_view_path, current($settings['views']['ajaxViews'])['view_path']);
  }
  
  /**
   * Assert that assets are not loaded twice on a page.
   *
   * @internal
   */
  protected function assertNoDuplicateAssetsOnPage() : void {
    /** @var \Behat\Mink\Element\NodeElement[] $scripts */
    $scripts = $this->getSession()
      ->getPage()
      ->findAll('xpath', '//script');
    $script_src = [];
    foreach ($scripts as $script) {
      $this->assertNotContains($script->getAttribute('src'), $script_src);
      $script_src[] = $script->getAttribute('src');
    }
  }

}