class LayoutBuilderTest

class LayoutBuilderTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'field_ui',
        'views',
        'layout_builder',
        'layout_builder_views_test',
        'layout_test',
        'block',
        'block_test',
        'contextual',
        'node',
        'layout_builder_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'starterkit_theme';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalPlaceBlock('local_tasks_block');
        // Create two nodes.
        $this->createContentType([
            'type' => 'bundle_with_section_field',
            'name' => 'Bundle with section field',
        ]);
        $this->createNode([
            'type' => 'bundle_with_section_field',
            'title' => 'The first node title',
            'body' => [
                [
                    'value' => 'The first node body',
                ],
            ],
        ]);
        $this->createNode([
            'type' => 'bundle_with_section_field',
            'title' => 'The second node title',
            'body' => [
                [
                    'value' => 'The second node body',
                ],
            ],
        ]);
    }
    
    /**
     * Tests deleting a field in-use by an overridden layout.
     */
    public function testDeleteField() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node fields',
        ]));
        // Enable layout builder overrides.
        LayoutBuilderEntityViewDisplay::load('node.bundle_with_section_field.default')->enableLayoutBuilder()
            ->setOverridable()
            ->save();
        // Ensure there is a layout override.
        $this->drupalGet('node/1/layout');
        $page->pressButton('Save layout');
        // Delete one of the fields in use.
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/fields/node.bundle_with_section_field.body/delete');
        $page->pressButton('Delete');
        // The node should still be accessible.
        $this->drupalGet('node/1');
        $assert_session->statusCodeEquals(200);
        $this->drupalGet('node/1/layout');
        $assert_session->statusCodeEquals(200);
    }
    
    /**
     * Tests Layout Builder overrides without access to edit the default layout.
     */
    public function testOverridesWithoutDefaultsAccess() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
        ]));
        LayoutBuilderEntityViewDisplay::load('node.bundle_with_section_field.default')->enableLayoutBuilder()
            ->setOverridable()
            ->save();
        $this->drupalGet('node/1');
        $page->clickLink('Layout');
        $assert_session->elementTextContains('css', '.layout-builder__message.layout-builder__message--overrides', 'You are editing the layout for this Bundle with section field content item.');
        $assert_session->linkNotExists('Edit the template for all Bundle with section field content items instead.');
    }
    
    /**
     * Tests Layout Builder overrides without Field UI installed.
     */
    public function testOverridesWithoutFieldUi() {
        $this->container
            ->get('module_installer')
            ->uninstall([
            'field_ui',
        ]);
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        // @todo In https://www.drupal.org/node/540008 switch this to logging in as
        //   a user with the 'configure any layout' permission.
        $this->drupalLogin($this->rootUser);
        LayoutBuilderEntityViewDisplay::load('node.bundle_with_section_field.default')->enableLayoutBuilder()
            ->setOverridable()
            ->save();
        $this->drupalGet('node/1');
        $page->clickLink('Layout');
        $assert_session->elementTextContains('css', '.layout-builder__message.layout-builder__message--overrides', 'You are editing the layout for this Bundle with section field content item.');
        $assert_session->linkNotExists('Edit the template for all Bundle with section field content items instead.');
    }
    
    /**
     * Tests functionality of Layout Builder for overrides.
     */
    public function testOverrides() {
        $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();
        // Add a block with a custom label.
        $this->drupalGet('node/1');
        $page->clickLink('Layout');
        // The layout form should not contain fields for the title of the node by
        // default.
        $assert_session->fieldNotExists('title[0][value]');
        $assert_session->elementTextContains('css', '.layout-builder__message.layout-builder__message--overrides', 'You are editing the layout for this Bundle with section field content item. Edit the template for all Bundle with section field content items instead.');
        $assert_session->linkExists('Edit the template for all Bundle with section field content items instead.');
        $page->clickLink('Add block');
        $page->clickLink('Powered by Drupal');
        $page->fillField('settings[label]', 'This is an override');
        $page->checkField('settings[label_display]');
        $page->pressButton('Add block');
        $page->pressButton('Save layout');
        $assert_session->pageTextContains('This is an override');
        // Get the UUID of the component.
        $components = Node::load(1)->get('layout_builder__layout')
            ->getSection(0)
            ->getComponents();
        end($components);
        $uuid = key($components);
        $this->drupalGet('layout_builder/update/block/overrides/node.1/0/content/' . $uuid);
        $page->uncheckField('settings[label_display]');
        $page->pressButton('Update');
        $assert_session->pageTextNotContains('This is an override');
        $page->pressButton('Save layout');
        $assert_session->pageTextNotContains('This is an override');
    }
    
    /**
     * Tests the Layout Builder UI for an entity type without a bundle.
     */
    public function testNonBundleEntityType() {
        $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() {
        $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() {
        $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.
        $edit = [
            'new_storage_type' => 'string',
            'label' => 'My text field',
            'field_name' => 'my_text',
        ];
        $this->drupalGet("{$field_ui_prefix}/fields/add-field");
        $this->submitForm($edit, 'Save and continue');
        $page->pressButton('Save field settings');
        $page->pressButton('Save settings');
        $this->drupalGet("{$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() {
        $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() {
        $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 a non-default view mode works as expected.
     */
    public function testNonDefaultViewMode() {
        $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';
        // Allow overrides for the layout.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $page->checkField('layout[enabled]');
        $page->pressButton('Save');
        $page->checkField('layout[allow_custom]');
        $page->pressButton('Save');
        $this->clickLink('Manage layout');
        // Confirm the body field only is shown once.
        $assert_session->elementsCount('css', '.field--name-body', 1);
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        $this->clickLink('Teaser');
        // Enabling Layout Builder for the default mode does not affect the teaser.
        $assert_session->addressEquals("{$field_ui_prefix}/display/teaser");
        $assert_session->elementNotExists('css', '#layout-builder__layout');
        $assert_session->checkboxNotChecked('layout[enabled]');
        $page->checkField('layout[enabled]');
        $page->pressButton('Save');
        $assert_session->linkExists('Manage layout');
        $page->clickLink('Manage layout');
        // Confirm the body field only is shown once.
        $assert_session->elementsCount('css', '.field--name-body', 1);
        // Enable a disabled view mode.
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        $assert_session->addressEquals("{$field_ui_prefix}/display/teaser");
        $page->clickLink('Default');
        $assert_session->addressEquals("{$field_ui_prefix}/display");
        $assert_session->linkNotExists('Full content');
        $page->checkField('display_modes_custom[full]');
        $page->pressButton('Save');
        $assert_session->linkExists('Full content');
        $page->clickLink('Full content');
        $assert_session->addressEquals("{$field_ui_prefix}/display/full");
        $page->checkField('layout[enabled]');
        $page->pressButton('Save');
        $assert_session->linkExists('Manage layout');
        $page->clickLink('Manage layout');
        // Confirm the body field only is shown once.
        $assert_session->elementsCount('css', '.field--name-body', 1);
    }
    
    /**
     * Tests that component's dependencies are respected during removal.
     */
    public function testPluginDependencies() {
        $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 that block plugins can define custom attributes and contextual links.
     */
    public function testPluginsProvidingCustomAttributesAndContextualLinks() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'access contextual links',
            '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');
        $page->clickLink('Add block');
        $page->clickLink('Test Attributes');
        $page->pressButton('Add block');
        $page->pressButton('Save layout');
        $this->drupalGet('node/1');
        $assert_session->elementExists('css', '.attribute-test-class');
        $assert_session->elementExists('css', '[custom-attribute=test]');
        $assert_session->elementExists('css', 'div[data-contextual-id*="layout_builder_test"]');
    }
    
    /**
     * Tests preview-aware layout & block plugins.
     */
    public function testPreviewAwarePlugins() {
        $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');
        $page->clickLink('Add block');
        $page->clickLink('Preview-aware block');
        $page->pressButton('Add block');
        $assert_session->elementExists('css', '.go-birds-preview');
        $assert_session->pageTextContains('The block template is being previewed.');
        $assert_session->pageTextContains('This block is being rendered in preview mode.');
        $page->pressButton('Save layout');
        $this->drupalGet('node/1');
        $assert_session->elementNotExists('css', '.go-birds-preview');
        $assert_session->pageTextNotContains('The block template is being previewed.');
        $assert_session->pageTextContains('This block is being rendered normally.');
    }
    
    /**
     * Tests preview-aware templates.
     */
    public function testPreviewAwareTemplates() {
        $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 the interaction between full and default view modes.
     *
     * @see \Drupal\layout_builder\Plugin\SectionStorage\OverridesSectionStorage::getDefaultSectionStorage()
     */
    public function testLayoutBuilderUiFullViewMode() {
        $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';
        // For the purposes of this test, turn the full view mode on and off to
        // prevent copying from the customized default view mode.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'display_modes_custom[full]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'display_modes_custom[full]' => FALSE,
        ], 'Save');
        // 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');
        // Customize the default view mode.
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        $this->clickLink('Add block');
        $this->clickLink('Powered by Drupal');
        $page->fillField('settings[label]', 'This is the default view mode');
        $page->checkField('settings[label_display]');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('This is the default view mode');
        $page->pressButton('Save layout');
        // The default view mode is used for both the node display and layout UI.
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('This is the default view mode');
        $assert_session->pageTextNotContains('This is the full view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the default view mode');
        $assert_session->pageTextNotContains('This is the full view mode');
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        // Enable the full view mode and customize it.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'display_modes_custom[full]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/full");
        $this->submitForm([
            'layout[enabled]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/full");
        $this->submitForm([
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $this->drupalGet("{$field_ui_prefix}/display/full/layout");
        $this->clickLink('Add block');
        $this->clickLink('Powered by Drupal');
        $page->fillField('settings[label]', 'This is the full view mode');
        $page->checkField('settings[label_display]');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('This is the full view mode');
        $page->pressButton('Save layout');
        // The full view mode is now used for both the node display and layout UI.
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        // Disable the full view mode, the default should be used again.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'display_modes_custom[full]' => FALSE,
        ], 'Save');
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('This is the default view mode');
        $assert_session->pageTextNotContains('This is the full view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the default view mode');
        $assert_session->pageTextNotContains('This is the full view mode');
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        // Re-enabling the full view mode restores the layout changes.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'display_modes_custom[full]' => TRUE,
        ], 'Save');
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        // Create an override of the full view mode.
        $this->clickLink('Add block');
        $this->clickLink('Powered by Drupal');
        $page->fillField('settings[label]', 'This is an override of the full view mode');
        $page->checkField('settings[label_display]');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $page->pressButton('Save layout');
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        // The override does not affect the full view mode.
        $this->drupalGet("{$field_ui_prefix}/display/full/layout");
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        // Reverting the override restores back to the full view mode.
        $this->drupalGet('node/1/layout');
        $page->pressButton('Revert to default');
        $page->pressButton('Revert');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextNotContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        // Recreate an override of the full view mode.
        $this->clickLink('Add block');
        $this->clickLink('Powered by Drupal');
        $page->fillField('settings[label]', 'This is an override of the full view mode');
        $page->checkField('settings[label_display]');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $page->pressButton('Save layout');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
        // Disable the full view mode.
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $this->submitForm([
            'display_modes_custom[full]' => FALSE,
        ], 'Save');
        // The override of the full view mode is still available.
        $this->drupalGet('node/1');
        $assert_session->pageTextContains('This is the full view mode');
        $assert_session->pageTextContains('This is an override of the full view mode');
        $assert_session->pageTextNotContains('This is the default view mode');
        // Reverting the override restores back to the default view mode.
        $this->drupalGet('node/1/layout');
        $page->pressButton('Revert to default');
        $page->pressButton('Revert');
        $assert_session->pageTextContains('This is the default view mode');
        $assert_session->pageTextNotContains('This is the full view mode');
        $this->drupalGet('node/1/layout');
        $assert_session->pageTextContains('This is the default view mode');
        $assert_session->pageTextNotContains('This is the full view mode');
        $page->pressButton('Discard changes');
        $page->pressButton('Confirm');
    }
    
    /**
     * Ensures that one bundle doesn't interfere with another bundle.
     */
    public function testFullViewModeMultipleBundles() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
        ]));
        // Create one bundle with the full view mode enabled.
        $this->createContentType([
            'type' => 'full_bundle',
        ]);
        $this->drupalGet('admin/structure/types/manage/full_bundle/display/default');
        $page->checkField('display_modes_custom[full]');
        $page->pressButton('Save');
        // Create another bundle without the full view mode enabled.
        $this->createContentType([
            'type' => 'default_bundle',
        ]);
        $this->drupalGet('admin/structure/types/manage/default_bundle/display/default');
        // Enable Layout Builder for defaults and overrides.
        $page->checkField('layout[enabled]');
        $page->pressButton('Save');
        $page->checkField('layout[allow_custom]');
        $page->pressButton('Save');
        $assert_session->checkboxChecked('layout[allow_custom]');
    }
    
    /**
     * {@inheritdoc}
     */
    public function testLayoutBuilderChooseBlocksAlter() {
        // See layout_builder_test_plugin_filter_block__layout_builder_alter().
        $assert_session = $this->assertSession();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer node fields',
        ]));
        // 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');
        $assert_session->linkExists('Manage layout');
        $this->clickLink('Manage layout');
        // Add a new block.
        $this->clickLink('Add block');
        // Verify that blocks not modified are present.
        $assert_session->linkExists('Powered by Drupal');
        $assert_session->linkExists('Default revision');
        // Verify that blocks explicitly removed are not present.
        $assert_session->linkNotExists('Help');
        $assert_session->linkNotExists('Sticky at top of lists');
        $assert_session->linkNotExists('Main page content');
        $assert_session->linkNotExists('Page title');
        // Verify that Changed block is not present on first section.
        $assert_session->linkNotExists('Changed');
        // Go back to Manage layout.
        $this->drupalGet('admin/structure/types/manage/bundle_with_section_field/display/default');
        $this->clickLink('Manage layout');
        // Add a new section.
        $this->clickLink('Add section', 1);
        $assert_session->linkExists('Two column');
        $this->clickLink('Two column');
        $assert_session->buttonExists('Add section');
        $this->getSession()
            ->getPage()
            ->pressButton('Add section');
        // Add a new block to second section.
        $this->clickLink('Add block', 1);
        // Verify that Changed block is present on second section.
        $assert_session->linkExists('Changed');
    }
    
    /**
     * Tests that extra fields work before and after enabling Layout Builder.
     */
    public function testExtraFields() {
        $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() {
        $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 deleting a View block used in Layout Builder works.
     */
    public function testDeletedView() {
        $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');
        $this->drupalGet('node/1');
        $assert_session->linkExists('Layout');
        $this->clickLink('Layout');
        $this->clickLink('Add block');
        $this->clickLink('Test Block View');
        $page->pressButton('Add block');
        $assert_session->pageTextContains('Test Block View');
        $assert_session->elementExists('css', '.block-views-blocktest-block-view-block-1');
        $page->pressButton('Save');
        $assert_session->pageTextContains('Test Block View');
        $assert_session->elementExists('css', '.block-views-blocktest-block-view-block-1');
        View::load('test_block_view')->delete();
        $this->drupalGet('node/1');
        // Node can be loaded after deleting the View.
        $assert_session->pageTextContains(Node::load(1)->getTitle());
        $assert_session->pageTextNotContains('Test Block View');
    }
    
    /**
     * Tests that hook_form_alter() has access to the Layout Builder info.
     */
    public function testFormAlter() {
        $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';
        $this->drupalGet("{$field_ui_prefix}/display/default");
        $page->checkField('layout[enabled]');
        $page->pressButton('Save');
        $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() {
        $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');
        $page->checkField('layout[enabled]');
        $page->pressButton('Save');
        $page->checkField('layout[allow_custom]');
        $page->pressButton('Save');
        $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() {
        $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() {
        $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 usage of placeholders for empty blocks.
     *
     * @see \Drupal\Core\Block\BlockPluginInterface::getPlaceholderString()
     * @see \Drupal\layout_builder\EventSubscriber\BlockComponentRenderArray::onBuildRender()
     */
    public function testBlockPlaceholder() {
        $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');
        // Customize the default view mode.
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        // Add a block whose content is controlled by state and is empty by default.
        $this->clickLink('Add block');
        $this->clickLink('Test block caching');
        $page->fillField('settings[label]', 'The block label');
        $page->pressButton('Add block');
        $block_content = 'I am content';
        $placeholder_content = 'Placeholder for the "The block label" block';
        // The block placeholder is displayed and there is no content.
        $assert_session->pageTextContains($placeholder_content);
        $assert_session->pageTextNotContains($block_content);
        // Set block content and reload the page.
        \Drupal::state()->set('block_test.content', $block_content);
        $this->getSession()
            ->reload();
        // The block placeholder is no longer displayed and the content is visible.
        $assert_session->pageTextNotContains($placeholder_content);
        $assert_session->pageTextContains($block_content);
    }
    
    /**
     * Tests a custom alter of the overrides form.
     */
    public function testOverridesFormAlter() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer nodes',
        ]));
        $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');
        $this->drupalGet('node/1');
        // The status checkbox should be checked by default.
        $page->clickLink('Layout');
        $assert_session->checkboxChecked('status[value]');
        $page->pressButton('Save layout');
        $assert_session->pageTextContains('The layout override has been saved.');
        // Unchecking the status checkbox will unpublish the entity.
        $page->clickLink('Layout');
        $page->uncheckField('status[value]');
        $page->pressButton('Save layout');
        $assert_session->statusCodeEquals(403);
        $assert_session->pageTextContains('The layout override has been saved.');
    }
    
    /**
     * Tests the Block UI when Layout Builder is installed.
     */
    public function testBlockUiListing() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'administer blocks',
        ]));
        $this->drupalGet('admin/structure/block');
        $page->clickLink('Place block');
        // Ensure that blocks expected to appear are available.
        $assert_session->pageTextContains('Test HTML block');
        $assert_session->pageTextContains('Block test');
        // Ensure that blocks not expected to appear are not available.
        $assert_session->pageTextNotContains('Body');
        $assert_session->pageTextNotContains('Content fields');
    }
    
    /**
     * Tests the expected breadcrumbs of the Layout Builder UI.
     */
    public function testBreadcrumb() {
        $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() {
        $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(),
        ])
            ->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 all sections from overrides and defaults.
     */
    public function testRemovingAllSections() {
        $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');
        // By default, there is one section.
        $this->drupalGet('node/1');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->pageTextContains('The first node body');
        $page->clickLink('Layout');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 2);
        // Remove the only section from the override.
        $page->clickLink('Remove Section 1');
        $page->pressButton('Remove');
        $assert_session->elementsCount('css', '.layout', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 1);
        // The override is still used instead of the default, despite being empty.
        $page->pressButton('Save layout');
        $assert_session->elementsCount('css', '.layout', 0);
        $assert_session->pageTextNotContains('The first node body');
        $page->clickLink('Layout');
        $assert_session->elementsCount('css', '.layout', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 1);
        // Add one section to the override.
        $page->clickLink('Add section');
        $page->clickLink('One column');
        $page->pressButton('Add section');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 2);
        $page->pressButton('Save layout');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->pageTextNotContains('The first node body');
        // By default, the default has one section.
        $this->drupalGet("{$field_ui_prefix}/display/default/layout");
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 2);
        // Remove the only section from the default.
        $page->clickLink('Remove Section 1');
        $page->pressButton('Remove');
        $assert_session->elementsCount('css', '.layout', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 1);
        $page->pressButton('Save layout');
        $page->clickLink('Manage layout');
        $assert_session->elementsCount('css', '.layout', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 0);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 1);
        // The override is still in use.
        $this->drupalGet('node/1');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->pageTextNotContains('The first node body');
        $page->clickLink('Layout');
        $assert_session->elementsCount('css', '.layout', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-block', 1);
        $assert_session->elementsCount('css', '.layout-builder__add-section', 2);
        // Revert the override.
        $page->pressButton('Revert to defaults');
        $page->pressButton('Revert');
        $assert_session->elementsCount('css', '.layout', 0);
        $assert_session->pageTextNotContains('The first node body');
    }
    
    /**
     * Tests removing section without layout label configuration.
     */
    public function testRemovingSectionWithoutLayoutLabel() {
        $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() {
        $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');
    }

}