class DisplayAttachmentTest

class DisplayAttachmentTest extends ViewTestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_display_attachment',
        'test_attached_disabled',
    ];
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'views',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'starterkit_theme';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE, $modules = [
        'views_test_config',
    ]) : void {
        parent::setUp($import_test_views, $modules);
        $this->enableViewsTestModule();
        $admin_user = $this->drupalCreateUser([
            'administer site configuration',
        ]);
        $this->drupalLogin($admin_user);
    }
    
    /**
     * Tests the attachment plugin.
     */
    public function testAttachment() {
        $this->drupalGet('test-display-attachment');
        // Verify that both actual view and the attachment are rendered.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "view-content")]', 2);
        // Verify that the attachment is not rendered after the actual view.
        $this->assertSession()
            ->elementNotExists('xpath', '//div[contains(@class, "attachment-after")]');
        // Verify that the attachment is rendered before the actual view.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "attachment-before")]', 1);
    }
    
    /**
     * Tests that nothing is output when the attachment displays are disabled.
     */
    public function testDisabledAttachments() {
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        $this->drupalCreateNode();
        // Ensure that the feed_1 display is attached to the page_1 display.
        $view = Views::getView('test_attached_disabled');
        $view->setDisplay('page_1');
        $attached_displays = $view->display_handler
            ->getAttachedDisplays();
        $this->assertContains('attachment_1', $attached_displays, 'The attachment_1 display is attached to the page display.');
        $this->assertContains('attachment_2', $attached_displays, 'The attachment_2 display is attached to the page display.');
        // Check that the attachments are output on the page display.
        $this->drupalGet('test-attached-disabled');
        // Verify that the page view and the attachments are rendered.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "view-content")]', 3);
        // Verify that the attachment is rendered before the page view.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "attachment-before")]', 1);
        // Verify that the attachment is rendered after the page view.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "attachment-after")]', 1);
        // Disable the attachment_1 display.
        $view->displayHandlers
            ->get('attachment_1')
            ->setOption('enabled', FALSE);
        $view->save();
        // Test that the before attachment is not displayed.
        $this->drupalGet('/test-attached-disabled');
        // Verify that the page view and only one attachment are rendered.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "view-content")]', 2);
        // Verify that the attachment_1 is not rendered.
        $this->assertSession()
            ->elementNotExists('xpath', '//div[contains(@class, "attachment-before")]');
        // Disable the attachment_2 display.
        $view->displayHandlers
            ->get('attachment_2')
            ->setOption('enabled', FALSE);
        $view->save();
        // Test that the after attachment is not displayed.
        $this->drupalGet('/test-attached-disabled');
        // Verify that the page view is rendered without attachments.
        $this->assertSession()
            ->elementsCount('xpath', '//div[contains(@class, "view-content")]', 1);
        // Verify that the attachment_2 is not rendered.
        $this->assertSession()
            ->elementNotExists('xpath', '//div[contains(@class, "attachment-after")]');
    }

}