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');
        }
    }

}