LayoutBuilderTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\layout_builder\Functional;

use Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay;
use Drupal\layout_builder\Section;
use Drupal\node\Entity\Node;
use Drupal\Tests\layout_builder\Traits\EnableLayoutBuilderTrait;

/**
 * Tests the Layout Builder UI.
 *
 * @group layout_builder
 */
class LayoutBuilderTest extends LayoutBuilderTestBase {
    use EnableLayoutBuilderTrait;
    
    /**
     * Tests the Layout Builder UI for an entity type without a bundle.
     */
    public function testNonBundleEntityType() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        // Log in as a user that can edit layout templates.
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer user display',
        ]));
        $this->drupalGet('admin/config/people/accounts/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $page->clickLink('Manage layout');
        $assert_session->pageTextContains('You are editing the layout template for all users.');
        $this->drupalGet('user');
        $page->clickLink('Layout');
        $assert_session->pageTextContains('You are editing the layout for this user. Edit the template for all users instead.');
        // Log in as a user that cannot edit layout templates.
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
        ]));
        $this->drupalGet('user');
        $page->clickLink('Layout');
        $assert_session->pageTextContains('You are editing the layout for this user.');
        $assert_session->pageTextNotContains('Edit the template for all users instead.');
    }
    
    /**
     * Tests that the Layout Builder preserves entity values.
     */
    public function testPreserverEntityValues() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        // From the manage display page, go to manage the layout.
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        // @todo This should not be necessary.
        $this->container
            ->get('entity_field.manager')
            ->clearCachedFieldDefinitions();
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('The first node body');
        // Create a layout override which will store the current node in the
        // tempstore.
        $page->clickLink('Layout');
        $page->clickLink('Add block');
        $page->clickLink('Powered by Drupal');
        $page->pressButton('Add block');
        // Update the node to make a change that is not in the tempstore version.
        $node = Node::load(1);
        $node->set('body', 'updated body');
        $node->save();
        $page->clickLink('View');
        $assert_session->pageTextNotContains('The first node body');
        $assert_session->pageTextContains('updated body');
        $page->clickLink('Layout');
        $page->pressButton('Save layout');
        // Ensure that saving the layout does not revert other field values.
        $assert_session->addressEquals('node/1');
        $assert_session->pageTextNotContains('The first node body');
        $assert_session->pageTextContains('updated body');
    }
    
    /**
     * {@inheritdoc}
     */
    public function testLayoutBuilderUi() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer node fields',
        ]));
        $this->drupalGet('node/1');
        $assert_session->elementNotExists('css', '.layout-builder-block');
        $assert_session->pageTextContains('The first node body');
        $assert_session->pageTextNotContains('Powered by Drupal');
        $assert_session->linkNotExists('Layout');
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        // From the manage display page, go to manage the layout.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $assert_session->linkNotExists('Manage layout');
        $assert_session->fieldDisabled('layout[allow_custom]');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $assert_session->linkExists('Manage layout');
        $this->clickLink('Manage layout');
        $assert_session->addressEquals("{$field_ui_prefix}/display/default/layout");
        $assert_session->elementTextContains('css', '.layout-builder__message.layout-builder__message--defaults', 'You are editing the layout template for all Bundle with section field content items.');
        // The body field is only present once.
        $assert_session->elementsCount('css', '.field--name-body', 1);
        // The extra field is only present once.
        $assert_session->pageTextContainsOnce('Placeholder for the "Extra label" field');
        // Blocks have layout builder specific block class.
        $assert_session->elementExists('css', '.layout-builder-block');
        // Save the defaults.
        $page->pressButton('Save layout');
        $assert_session->addressEquals("{$field_ui_prefix}/display/default");
        // Load the default layouts again after saving to confirm fields are only
        // added on new layouts.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $assert_session->linkExists('Manage layout');
        $this->clickLink('Manage layout');
        $assert_session->addressEquals("{$field_ui_prefix}/display/default/layout");
        // The body field is only present once.
        $assert_session->elementsCount('css', '.field--name-body', 1);
        // The extra field is only present once.
        $assert_session->pageTextContainsOnce('Placeholder for the "Extra label" field');
        // Add a new block.
        $assert_session->linkExists('Add block');
        $this->clickLink('Add block');
        $assert_session->linkExists('Powered by Drupal');
        $this->clickLink('Powered by Drupal');
        $page->fillField('settings[label]', 'This is the label');
        $page->checkField('settings[label_display]');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('Powered by Drupal');
        $assert_session->pageTextContains('This is the label');
        $assert_session->addressEquals("{$field_ui_prefix}/display/default/layout");
        // Save the defaults.
        $page->pressButton('Save layout');
        $assert_session->pageTextContains('The layout has been saved.');
        $assert_session->addressEquals("{$field_ui_prefix}/display/default");
        // The node uses the defaults, no overrides available.
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('The first node body');
        $assert_session->pageTextContains('Powered by Drupal');
        $assert_session->pageTextContains('Extra, Extra read all about it.');
        $assert_session->pageTextNotContains('Placeholder for the "Extra label" field');
        $assert_session->linkNotExists('Layout');
        $assert_session->pageTextContains(sprintf('Yes, I can access the %s', Node::load(1)->label()));
        // Enable overrides.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $this->drupalGet('node/1');
        // Remove the section from the defaults.
        $assert_session->linkExists('Layout');
        $this->clickLink('Layout');
        $assert_session->pageTextContains('Placeholder for the "Extra label" field');
        $assert_session->linkExists('Remove Section 1');
        $this->clickLink('Remove Section 1');
        $page->pressButton('Remove');
        // Add a new section.
        $this->clickLink('Add section');
        $this->assertCorrectLayouts();
        $assert_session->linkExists('Two column');
        $this->clickLink('Two column');
        $assert_session->buttonExists('Add section');
        $page->pressButton('Add section');
        $page->pressButton('Save');
        $assert_session->pageTextNotContains('The first node body');
        $assert_session->pageTextNotContains('Powered by Drupal');
        $assert_session->pageTextNotContains('Extra, Extra read all about it.');
        $assert_session->pageTextNotContains('Placeholder for the "Extra label" field');
        $assert_session->pageTextContains(sprintf('Yes, I can access the entity %s in two column', Node::load(1)->label()));
        // Assert that overrides cannot be turned off while overrides exist.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $assert_session->checkboxChecked('layout[allow_custom]');
        $assert_session->fieldDisabled('layout[allow_custom]');
        // Alter the defaults.
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        $assert_session->linkExists('Add block');
        $this->clickLink('Add block');
        $assert_session->linkExists('Title');
        $this->clickLink('Title');
        $page->pressButton('Add block');
        // The title field is present.
        $assert_session->elementExists('css', '.field--name-title');
        $page->pressButton('Save layout');
        // View the other node, which is still using the defaults.
        $this->drupalGet('node/2');
        $assert_session->pageTextContains('The second node title');
        $assert_session->pageTextContains('The second node body');
        $assert_session->pageTextContains('Powered by Drupal');
        $assert_session->pageTextContains('Extra, Extra read all about it.');
        $assert_session->pageTextNotContains('Placeholder for the "Extra label" field');
        $assert_session->pageTextContains(sprintf('Yes, I can access the %s', Node::load(2)->label()));
        // The overridden node does not pick up the changes to defaults.
        $this->drupalGet('node/1');
        $assert_session->elementNotExists('css', '.field--name-title');
        $assert_session->pageTextNotContains('The first node body');
        $assert_session->pageTextNotContains('Powered by Drupal');
        $assert_session->pageTextNotContains('Extra, Extra read all about it.');
        $assert_session->pageTextNotContains('Placeholder for the "Extra label" field');
        $assert_session->linkExists('Layout');
        // Reverting the override returns it to the defaults.
        $this->clickLink('Layout');
        $assert_session->linkExists('Add block');
        $this->clickLink('Add block');
        $assert_session->linkExists('ID');
        $this->clickLink('ID');
        $page->pressButton('Add block');
        // The title field is present.
        $assert_session->elementExists('css', '.field--name-nid');
        $assert_session->pageTextContains('ID');
        $assert_session->pageTextContains('1');
        $page->pressButton('Revert to defaults');
        $page->pressButton('Revert');
        $assert_session->addressEquals('node/1');
        $assert_session->pageTextContains('The layout has been reverted back to defaults.');
        $assert_session->elementExists('css', '.field--name-title');
        $assert_session->elementNotExists('css', '.field--name-nid');
        $assert_session->pageTextContains('The first node body');
        $assert_session->pageTextContains('Powered by Drupal');
        $assert_session->pageTextContains('Extra, Extra read all about it.');
        $assert_session->pageTextNotContains(sprintf('Yes, I can access the entity %s in two column', Node::load(1)->label()));
        $assert_session->pageTextContains(sprintf('Yes, I can access the %s', Node::load(1)->label()));
        // Assert that overrides can be turned off now that all overrides are gone.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[allow_custom]' => FALSE,
        ], 'Save');
        $this->drupalGet('node/1');
        $assert_session->linkNotExists('Layout');
        // Add a new field.
        $this->fieldUIAddNewField($field_ui_prefix, 'my_text', 'My text field', 'string');
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        $assert_session->pageTextContains('My text field');
        $assert_session->elementExists('css', '.field--name-field-my-text');
        // Delete the field.
        $this->drupalGet("{$field_ui_prefix}/fields/node.bundle_with_section_field.field_my_text/delete");
        $this->submitForm([], 'Delete');
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        $assert_session->pageTextNotContains('My text field');
        $assert_session->elementNotExists('css', '.field--name-field-my-text');
        $this->clickLink('Add section');
        $this->clickLink('One column');
        $page->fillField('layout_settings[label]', 'My Cool Section');
        $page->pressButton('Add section');
        $expected_labels = [
            'My Cool Section',
            'Content region in My Cool Section',
            'Section 2',
            'Content region in Section 2',
        ];
        $labels = [];
        foreach ($page->findAll('css', '[role="group"]') as $element) {
            $labels[] = $element->getAttribute('aria-label');
        }
        $this->assertSame($expected_labels, $labels);
    }
    
    /**
     * Test decorating controller.entity_form while layout_builder is installed.
     */
    public function testHtmlEntityFormControllerDecoration() : void {
        $assert_session = $this->assertSession();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        // Install module that decorates controller.entity_form.
        \Drupal::service('module_installer')->install([
            'layout_builder_decoration_test',
        ]);
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $assert_session->pageTextContains('Manage Display');
    }
    
    /**
     * Tests that layout builder checks entity view access.
     */
    public function testAccess() : void {
        $assert_session = $this->assertSession();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        // Allow overrides for the layout.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
        ]));
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('The first node body');
        $assert_session->pageTextNotContains('Powered by Drupal');
        $node = Node::load(1);
        $node->setUnpublished();
        $node->save();
        $this->drupalGet('node/1');
        $assert_session->pageTextNotContains('The first node body');
        $assert_session->pageTextContains('Access denied');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextNotContains('The first node body');
        $assert_session->pageTextContains('Access denied');
    }
    
    /**
     * Tests that component's dependencies are respected during removal.
     */
    public function testPluginDependencies() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->container
            ->get('module_installer')
            ->install([
            'menu_ui',
        ]);
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer menu',
        ]));
        // Create a new menu.
        $this->drupalGet('admin/structure/menu/add');
        $page->fillField('label', 'My Menu');
        $page->fillField('id', 'my-menu');
        $page->pressButton('Save');
        $this->drupalGet('admin/structure/menu/add');
        $page->fillField('label', 'My Menu');
        $page->fillField('id', 'my-other-menu');
        $page->pressButton('Save');
        $page->clickLink('Add link');
        $page->fillField('title[0][value]', 'My link');
        $page->fillField('link[0][uri]', '/');
        $page->pressButton('Save');
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $assert_session->linkExists('Manage layout');
        $this->clickLink('Manage layout');
        $assert_session->linkExists('Add section');
        $this->clickLink('Add section');
        $assert_session->linkExists('Layout plugin (with dependencies)');
        $this->clickLink('Layout plugin (with dependencies)');
        $page->pressButton('Add section');
        $assert_session->elementExists('css', '.layout--layout-test-dependencies-plugin');
        $assert_session->elementExists('css', '.field--name-body');
        $page->pressButton('Save layout');
        $this->drupalGet('admin/structure/menu/manage/my-other-menu/delete');
        $this->submitForm([], 'Delete');
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default/layout');
        $assert_session->elementNotExists('css', '.layout--layout-test-dependencies-plugin');
        $assert_session->elementExists('css', '.field--name-body');
        // Add a menu block.
        $assert_session->linkExists('Add block');
        $this->clickLink('Add block');
        $assert_session->linkExists('My Menu');
        $this->clickLink('My Menu');
        $page->pressButton('Add block');
        // Add another block alongside the menu.
        $assert_session->linkExists('Add block');
        $this->clickLink('Add block');
        $assert_session->linkExists('Powered by Drupal');
        $this->clickLink('Powered by Drupal');
        $page->pressButton('Add block');
        // Assert that the blocks are visible, and save the layout.
        $assert_session->pageTextContains('Powered by Drupal');
        $assert_session->pageTextContains('My Menu');
        $assert_session->elementExists('css', '.block.menu--my-menu');
        $page->pressButton('Save layout');
        // Delete the menu.
        $this->drupalGet('admin/structure/menu/manage/my-menu/delete');
        $this->submitForm([], 'Delete');
        // Ensure that the menu block is gone, but that the other block remains.
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default/layout');
        $assert_session->pageTextContains('Powered by Drupal');
        $assert_session->pageTextNotContains('My Menu');
        $assert_session->elementNotExists('css', '.block.menu--my-menu');
    }
    
    /**
     * Tests preview-aware templates.
     */
    public function testPreviewAwareTemplates() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $page->clickLink('Manage layout');
        $page->clickLink('Add section');
        $page->clickLink('1 column layout');
        $page->pressButton('Add section');
        $page->clickLink('Add block');
        $page->clickLink('Preview-aware block');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('This is a preview, indeed');
        $page->pressButton('Save layout');
        $this->drupalGet('node/1');
        $assert_session->pageTextNotContains('This is a preview, indeed');
    }
    
    /**
     * Tests that extra fields work before and after enabling Layout Builder.
     */
    public function testExtraFields() : void {
        $assert_session = $this->assertSession();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $this->drupalGet('node');
        $assert_session->linkExists('Read more');
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        // Extra fields display under "Content fields".
        $this->drupalGet("admin/structure/types/manage/bundle_with_section_field/display/default/layout");
        $this->clickLink('Add block');
        $assert_session->elementTextContains('xpath', '//details/summary[contains(text(),"Content fields")]/parent::details', 'Extra label');
        $this->drupalGet('node');
        $assert_session->linkExists('Read more');
        // Consider an extra field hidden by default. Make sure it's not displayed.
        $this->drupalGet('node/1');
        $assert_session->pageTextNotContains('Extra Field 2 is hidden by default.');
        // View the layout and add the extra field that is not visible by default.
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default/layout');
        $assert_session->pageTextNotContains('Extra Field 2');
        $page = $this->getSession()
            ->getPage();
        $page->clickLink('Add block');
        $page->clickLink('Extra Field 2');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('Extra Field 2');
        $page->pressButton('Save layout');
        // Confirm that the newly added extra field is visible.
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('Extra Field 2 is hidden by default.');
    }
    
    /**
     * Tests loading a pending revision in the Layout Builder UI.
     */
    public function testPendingRevision() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        // Enable overrides.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $node = $storage->load(1);
        // Create a pending revision.
        $pending_revision = $storage->createRevision($node, FALSE);
        $pending_revision->set('title', 'The pending title of the first node');
        $pending_revision->save();
        // The original node title is available when viewing the node, but the
        // pending title is visible within the Layout Builder UI.
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('The first node title');
        $page->clickLink('Layout');
        $assert_session->pageTextNotContains('The first node title');
        $assert_session->pageTextContains('The pending title of the first node');
    }
    
    /**
     * Tests that hook_form_alter() has access to the Layout Builder info.
     */
    public function testFormAlter() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer node fields',
        ]));
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        $display = LayoutBuilderEntityViewDisplay::load('node.bundle_with_section_field.default');
        $this->enableLayoutBuilder($display);
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $page->clickLink('Manage layout');
        $page->clickLink('Add block');
        $page->clickLink('Powered by Drupal');
        $assert_session->pageTextContains('Layout Builder Storage: node.bundle_with_section_field.default');
        $assert_session->pageTextContains('Layout Builder Section: layout_onecol');
        $assert_session->pageTextContains('Layout Builder Component: system_powered_by_block');
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $page->clickLink('Manage layout');
        $page->clickLink('Add section');
        $page->clickLink('One column');
        $assert_session->pageTextContains('Layout Builder Storage: node.bundle_with_section_field.default');
        $assert_session->pageTextContains('Layout Builder Section: layout_onecol');
        $assert_session->pageTextContains('Layout Builder Layout: layout_onecol');
    }
    
    /**
     * Tests the functionality of custom section labels.
     */
    public function testSectionLabels() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $display = LayoutBuilderEntityViewDisplay::load('node.bundle_with_section_field.default');
        $this->enableLayoutBuilder($display);
        $this->drupalGet('node/1/layout');
        $page->clickLink('Add section');
        $page->clickLink('One column');
        $page->fillField('layout_settings[label]', 'My Cool Section');
        $page->pressButton('Add section');
        $assert_session->pageTextContains('My Cool Section');
        $page->pressButton('Save layout');
        $assert_session->pageTextNotContains('My Cool Section');
    }
    
    /**
     * Tests that layouts can be context-aware.
     */
    public function testContextAwareLayouts() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $account = $this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]);
        $this->drupalLogin($account);
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $page->clickLink('Manage layout');
        $page->clickLink('Add section');
        $page->clickLink('Layout Builder Test: Context Aware');
        $page->pressButton('Add section');
        // See \Drupal\layout_builder_test\Plugin\Layout\TestContextAwareLayout::build().
        $assert_session->elementExists('css', '.user--' . $account->getAccountName());
        $page->clickLink('Configure Section 1');
        $page->fillField('layout_settings[label]', 'My section');
        $page->pressButton('Update');
        $assert_session->linkExists('Configure My section');
        $page->clickLink('Add block');
        $page->clickLink('Powered by Drupal');
        $page->pressButton('Add block');
        $page->pressButton('Save layout');
        $this->drupalGet('node/1');
        // See \Drupal\layout_builder_test\Plugin\Layout\TestContextAwareLayout::build().
        $assert_session->elementExists('css', '.user--' . $account->getAccountName());
    }
    
    /**
     * Tests that sections can provide custom attributes.
     */
    public function testCustomSectionAttributes() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $page->clickLink('Manage layout');
        $page->clickLink('Add section');
        $page->clickLink('Layout Builder Test Plugin');
        $page->pressButton('Add section');
        // See \Drupal\layout_builder_test\Plugin\Layout\LayoutBuilderTestPlugin::build().
        $assert_session->elementExists('css', '.go-birds');
    }
    
    /**
     * Tests the expected breadcrumbs of the Layout Builder UI.
     */
    public function testBreadcrumb() : void {
        $page = $this->getSession()
            ->getPage();
        $this->drupalPlaceBlock('system_breadcrumb_block');
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer content types',
            'access administration pages',
        ]));
        // From the manage display page, go to manage the layout.
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $page->clickLink('Manage layout');
        $breadcrumb_titles = [];
        foreach ($page->findAll('css', '.breadcrumb a') as $link) {
            $breadcrumb_titles[$link->getText()] = $link->getAttribute('href');
        }
        $base_path = base_path();
        $expected = [
            'Home' => $base_path,
            'Administration' => $base_path . 'admin',
            'Structure' => $base_path . 'admin/structure',
            'Content types' => $base_path . 'admin/structure/types',
            'Bundle with section field' => $base_path . 'admin/structure/types/manage/bundle_with_section_field',
            'Manage display' => $base_path . 'admin/structure/types/manage/bundle_with_section_field/display/default',
            'External link' => 'http://www.example.com',
        ];
        $this->assertSame($expected, $breadcrumb_titles);
    }
    
    /**
     * Tests a config-based implementation of Layout Builder.
     *
     * @see \Drupal\layout_builder_test\Plugin\SectionStorage\SimpleConfigSectionStorage
     */
    public function testSimpleConfigBasedLayout() : void {
        $assert_session = $this->assertSession();
        $this->drupalLogin($this->createUser([
            'configure any layout',
        ]));
        // Prepare an object with a pre-existing section.
        $this->container
            ->get('config.factory')
            ->getEditable('layout_builder_test.test_simple_config.existing')
            ->set('sections', [
            (new Section('layout_twocol'))->toArray(),
        ])
            ->set('langcode', 'en')
            ->save();
        // The pre-existing section is found.
        $this->drupalGet('layout-builder-test-simple-config/existing');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->elementsCount('css', '.layout--twocol', 1);
        // No layout is selected for a new object.
        $this->drupalGet('layout-builder-test-simple-config/new');
        $assert_session->elementNotExists('css', '.layout');
    }
    
    /**
     * Tests removing section without layout label configuration.
     */
    public function testRemovingSectionWithoutLayoutLabel() : void {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        // Enable overrides.
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        $page->clickLink('Add section');
        $assert_session->linkExists('Layout Without Label');
        $page->clickLink('Layout Without Label');
        $page->pressButton('Add section');
        $assert_session->elementsCount('css', '.layout', 2);
        $assert_session->linkExists('Remove Section 1');
        $this->clickLink('Remove Section 1');
        $page->pressButton('Remove');
        $assert_session->statusCodeEquals(200);
        $assert_session->elementsCount('css', '.layout', 1);
    }
    
    /**
     * Asserts that the correct layouts are available.
     *
     * @internal
     */
    protected function assertCorrectLayouts() : void {
        $assert_session = $this->assertSession();
        // Ensure the layouts provided by layout_builder are available.
        $expected_layouts_hrefs = [
            'layout_builder/configure/section/overrides/node.1/0/layout_onecol',
            'layout_builder/configure/section/overrides/node.1/0/layout_twocol_section',
            'layout_builder/configure/section/overrides/node.1/0/layout_threecol_section',
            'layout_builder/configure/section/overrides/node.1/0/layout_fourcol_section',
        ];
        foreach ($expected_layouts_hrefs as $expected_layouts_href) {
            $assert_session->linkByHrefExists($expected_layouts_href);
        }
        // Ensure the layout_discovery module's layouts were removed.
        $unexpected_layouts = [
            'twocol',
            'twocol_bricks',
            'threecol_25_50_25',
            'threecol_33_34_33',
        ];
        foreach ($unexpected_layouts as $unexpected_layout) {
            $assert_session->linkByHrefNotExists("layout_builder/add/section/overrides/node.1/0/{$unexpected_layout}");
            $assert_session->linkByHrefNotExists("layout_builder/configure/section/overrides/node.1/0/{$unexpected_layout}");
        }
    }
    
    /**
     * Tests the Layout Builder UI with a context defined at runtime.
     */
    public function testLayoutBuilderContexts() : void {
        $node_url = 'node/1';
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $this->drupalGet($node_url);
        $assert_session->linkExists('Layout');
        $this->clickLink('Layout');
        $assert_session->linkExists('Add section');
        // Add the testing block.
        $page->clickLink('Add block');
        $this->clickLink('Can I have runtime contexts');
        $page->pressButton('Add block');
        // Ensure the runtime context value is rendered before saving.
        $assert_session->pageTextContains('for sure you can');
        // Save the layout, and test that the value is rendered after save.
        $page->pressButton('Save layout');
        $assert_session->addressEquals($node_url);
        $assert_session->pageTextContains('for sure you can');
        $assert_session->elementExists('css', '.layout');
    }

}