class BlockTest

class BlockTest extends BlockTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests block visibility.
     */
    public function testBlockVisibility() : void {
        $block_name = 'system_powered_by_block';
        // Create a random title for the block.
        $title = $this->randomMachineName(8);
        // Enable a standard block.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $edit = [
            'id' => $this->randomMachineName(8),
            'region' => 'sidebar_first',
            'settings[label]' => $title,
            'settings[label_display]' => TRUE,
        ];
        // Set the block to be hidden on any user path, to be shown only to
        // authenticated users, and to be shown only on 200 and 404 responses.
        $edit['visibility[request_path][pages]'] = '/user*';
        $edit['visibility[request_path][negate]'] = TRUE;
        $edit['visibility[user_role][roles][' . RoleInterface::AUTHENTICATED_ID . ']'] = TRUE;
        $edit['visibility[response_status][status_codes][200]'] = 200;
        $edit['visibility[response_status][status_codes][404]'] = 404;
        $this->drupalGet('admin/structure/block/add/' . $block_name . '/' . $default_theme);
        $this->assertSession()
            ->checkboxChecked('edit-visibility-request-path-negate-0');
        $this->submitForm($edit, 'Save block');
        $this->assertSession()
            ->statusMessageContains('The block configuration has been saved.', 'status');
        $this->clickLink('Configure');
        $this->assertSession()
            ->checkboxChecked('edit-visibility-request-path-negate-1');
        $this->assertSession()
            ->checkboxChecked('edit-visibility-response-status-status-codes-200');
        $this->assertSession()
            ->checkboxChecked('edit-visibility-response-status-status-codes-404');
        // Confirm that the block is displayed on the front page (200 response).
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextContains($title);
        // Confirm that the block is not displayed according to path visibility
        // rules.
        $this->drupalGet('user');
        $this->assertSession()
            ->pageTextNotContains($title);
        // Confirm that the block is displayed on a 404 response.
        $this->drupalGet('/0/null');
        $this->assertSession()
            ->pageTextContains($title);
        // Confirm that the block is not displayed on a 403 response.
        $this->drupalGet('/admin/config/system/cron');
        $this->assertSession()
            ->pageTextNotContains($title);
        // Confirm that the block is not displayed to anonymous users.
        $this->drupalLogout();
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextNotContains($title);
        // Confirm that an empty block is not displayed.
        $this->assertSession()
            ->pageTextNotContains('Powered by Drupal');
        $this->assertSession()
            ->responseNotContains('sidebar-first');
    }
    
    /**
     * Tests that visibility can be properly toggled.
     */
    public function testBlockToggleVisibility() : void {
        $block_name = 'system_powered_by_block';
        // Create a random title for the block.
        $title = $this->randomMachineName(8);
        // Enable a standard block.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $edit = [
            'id' => $this->randomMachineName(8),
            'region' => 'sidebar_first',
            'settings[label]' => $title,
        ];
        $block_id = $edit['id'];
        // Set the block to be shown only to authenticated users.
        $edit['visibility[user_role][roles][' . RoleInterface::AUTHENTICATED_ID . ']'] = TRUE;
        $this->drupalGet('admin/structure/block/add/' . $block_name . '/' . $default_theme);
        $this->submitForm($edit, 'Save block');
        $this->clickLink('Configure');
        $this->assertSession()
            ->checkboxChecked('edit-visibility-user-role-roles-authenticated');
        $edit = [
            'visibility[user_role][roles][' . RoleInterface::AUTHENTICATED_ID . ']' => FALSE,
        ];
        $this->submitForm($edit, 'Save block');
        $this->clickLink('Configure');
        $this->assertSession()
            ->checkboxNotChecked('edit-visibility-user-role-roles-authenticated');
        // Ensure that no visibility is configured.
        
        /** @var \Drupal\block\BlockInterface $block */
        $block = Block::load($block_id);
        $visibility_config = $block->getVisibilityConditions()
            ->getConfiguration();
        $this->assertSame([], $visibility_config);
        $this->assertSame([], $block->get('visibility'));
    }
    
    /**
     * Tests block visibility when leaving "pages" textarea empty.
     */
    public function testBlockVisibilityListedEmpty() : void {
        $block_name = 'system_powered_by_block';
        // Create a random title for the block.
        $title = $this->randomMachineName(8);
        // Enable a standard block.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $edit = [
            'id' => $this->randomMachineName(8),
            'region' => 'sidebar_first',
            'settings[label]' => $title,
            'visibility[request_path][negate]' => TRUE,
        ];
        // Set the block to be hidden on any user path, and to be shown only to
        // authenticated users.
        $this->drupalGet('admin/structure/block/add/' . $block_name . '/' . $default_theme);
        $this->submitForm($edit, 'Save block');
        $this->assertSession()
            ->statusMessageContains('The block configuration has been saved.', 'status');
        // Confirm that block was not displayed according to block visibility
        // rules.
        $this->drupalGet('user');
        $this->assertSession()
            ->pageTextNotContains($title);
        // Confirm that block was not displayed according to block visibility
        // rules regardless of path case.
        $this->drupalGet('USER');
        $this->assertSession()
            ->pageTextNotContains($title);
        // Confirm that the block is not displayed to anonymous users.
        $this->drupalLogout();
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextNotContains($title);
    }
    
    /**
     * Tests adding a block from the library page with a weight query string.
     */
    public function testAddBlockFromLibraryWithWeight() : void {
        $default_theme = $this->config('system.theme')
            ->get('default');
        // Test one positive, zero, and one negative weight.
        foreach ([
            '7',
            '0',
            '-9',
        ] as $weight) {
            $options = [
                'query' => [
                    'region' => 'sidebar_first',
                    'weight' => $weight,
                ],
            ];
            $this->drupalGet(Url::fromRoute('block.admin_library', [
                'theme' => $default_theme,
            ], $options));
            $block_name = 'system_powered_by_block';
            $add_url = Url::fromRoute('block.admin_add', [
                'plugin_id' => $block_name,
                'theme' => $default_theme,
            ]);
            // Verify that one link is found, with the expected link text.
            $xpath = $this->assertSession()
                ->buildXPathQuery('//a[contains(@href, :href)]', [
                ':href' => $add_url->toString(),
            ]);
            $this->assertSession()
                ->elementsCount('xpath', $xpath, 1);
            $this->assertSession()
                ->elementTextEquals('xpath', $xpath, 'Place block');
            $link = $this->getSession()
                ->getPage()
                ->find('xpath', $xpath);
            [
                $path,
                $query_string,
            ] = explode('?', $link->getAttribute('href'), 2);
            parse_str($query_string, $query_parts);
            $this->assertEquals($weight, $query_parts['weight'], 'Found the expected weight query string.');
            // Create a random title for the block.
            $title = $this->randomMachineName(8);
            $block_id = $this->randomMachineName(8);
            $edit = [
                'id' => $block_id,
                'settings[label]' => $title,
            ];
            // Create the block using the link parsed from the library page.
            $this->drupalGet($this->getAbsoluteUrl($link->getAttribute('href')));
            $this->submitForm($edit, 'Save block');
            // Ensure that the block was created with the expected weight.
            
            /** @var \Drupal\block\BlockInterface $block */
            $block = Block::load($block_id);
            $this->assertEquals($weight, $block->getWeight(), 'Found the block with expected weight.');
        }
    }
    
    /**
     * Tests configuring and moving a module-define block to specific regions.
     */
    public function testBlock() : void {
        // Place page title block to test error messages.
        $this->drupalPlaceBlock('page_title_block');
        // Disable the block.
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Disable');
        // Select the 'Powered by Drupal' block to be configured and moved.
        $block = [];
        $block['id'] = 'system_powered_by_block';
        $block['settings[label]'] = $this->randomMachineName(8);
        $block['settings[label_display]'] = TRUE;
        $block['theme'] = $this->config('system.theme')
            ->get('default');
        $block['region'] = 'header';
        // Set block title to confirm that interface works and override any custom titles.
        $this->drupalGet('admin/structure/block/add/' . $block['id'] . '/' . $block['theme']);
        $this->submitForm([
            'settings[label]' => $block['settings[label]'],
            'settings[label_display]' => $block['settings[label_display]'],
            'id' => $block['id'],
            'region' => $block['region'],
        ], 'Save block');
        $this->assertSession()
            ->statusMessageContains('The block configuration has been saved.', 'status');
        // Check to see if the block was created by checking its configuration.
        $instance = Block::load($block['id']);
        $this->assertEquals($block['settings[label]'], $instance->label(), 'Stored block title found.');
        // Check whether the block can be moved to all available regions.
        foreach ($this->regions as $region) {
            $this->moveBlockToRegion($block, $region);
        }
        // Disable the block.
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Disable');
        // Confirm that the block is now listed as disabled.
        $this->assertSession()
            ->statusMessageContains('The block settings have been updated.', 'status');
        // Confirm that the block instance title and markup are not displayed.
        $this->drupalGet('node');
        $this->assertSession()
            ->pageTextNotContains($block['settings[label]']);
        // Check for <div id="block-my-block-instance-name"> if the machine name
        // is my_block_instance_name.
        $xpath = $this->assertSession()
            ->buildXPathQuery('//div[@id=:id]/*', [
            ':id' => 'block-' . str_replace('_', '-', strtolower($block['id'])),
        ]);
        $this->assertSession()
            ->elementNotExists('xpath', $xpath);
        $pages = [
            '',
            '<front>',
            '/valid-page',
            'user/login',
        ];
        // Test error when not including forward slash.
        $this->drupalGet('admin/structure/block/manage/' . $block['id']);
        $this->submitForm([
            'visibility[request_path][pages]' => implode("\n", $pages),
        ], 'Save block');
        $this->assertSession()
            ->pageTextContains('The path user/login requires a leading forward slash when used with the Pages setting.');
        // Test deleting the block from the edit form.
        $this->drupalGet('admin/structure/block/manage/' . $block['id']);
        $this->clickLink('Remove block');
        $this->assertSession()
            ->pageTextContains('Are you sure you want to remove the block ' . $block['settings[label]'] . ' from the Footer region?');
        $this->submitForm([], 'Remove');
        $this->assertSession()
            ->statusMessageContains('The block ' . $block['settings[label]'] . ' has been removed from the Footer region.', 'status');
        // Test deleting a block via "Configure block" link.
        $block = $this->drupalPlaceBlock('system_powered_by_block', [
            'region' => 'left_sidebar',
        ]);
        $this->drupalGet('admin/structure/block/manage/' . $block->id(), [
            'query' => [
                'destination' => 'admin',
            ],
        ]);
        $this->clickLink('Remove block');
        $this->assertSession()
            ->pageTextContains('Are you sure you want to remove the block ' . $block->label() . ' from the Left sidebar region?');
        $this->submitForm([], 'Remove');
        $this->assertSession()
            ->statusMessageContains('The block ' . $block->label() . ' has been removed from the Left sidebar region.', 'status');
        $this->assertSession()
            ->addressEquals('admin');
        $this->assertSession()
            ->responseNotContains($block->id());
    }
    
    /**
     * Tests that the block form has a theme selector when not passed via the URL.
     */
    public function testBlockThemeSelector() : void {
        // Install all themes.
        $themes = [
            'olivero',
            'claro',
            'stark',
        ];
        \Drupal::service('theme_installer')->install($themes);
        $theme_settings = $this->config('system.theme');
        foreach ($themes as $theme) {
            $this->drupalGet('admin/structure/block/list/' . $theme);
            $this->assertSession()
                ->titleEquals('Block layout | Drupal');
            // Select the 'Powered by Drupal' block to be placed.
            $block = [];
            $block['id'] = $this->randomMachineName();
            $block['theme'] = $theme;
            $block['region'] = 'content';
            $this->drupalGet('admin/structure/block/add/system_powered_by_block');
            $this->submitForm($block, 'Save block');
            $this->assertSession()
                ->statusMessageContains('The block configuration has been saved.', 'status');
            $this->assertSession()
                ->addressEquals('admin/structure/block/list/' . $theme . '?block-placement=' . Html::getClass($block['id']));
            // Set the default theme and ensure the block is placed.
            $theme_settings->set('default', $theme)
                ->save();
            $this->drupalGet('');
            $block_id = Html::getUniqueId('block-' . $block['id']);
            $this->assertSession()
                ->elementExists('xpath', "//div[@id = '{$block_id}']");
        }
    }
    
    /**
     * Tests block display of theme titles.
     */
    public function testThemeName() : void {
        // Enable the help block.
        $this->drupalPlaceBlock('help_block', [
            'region' => 'help',
        ]);
        $this->drupalPlaceBlock('local_tasks_block');
        // Explicitly set the default and admin themes.
        $theme = 'block_test_specialchars_theme';
        \Drupal::service('theme_installer')->install([
            $theme,
        ]);
        $this->drupalGet('admin/structure/block');
        $this->assertSession()
            ->assertEscaped('<"Cat" & \'Mouse\'>');
        $this->drupalGet('admin/structure/block/list/block_test_specialchars_theme');
        $this->assertSession()
            ->assertEscaped('Demonstrate block regions (<"Cat" & \'Mouse\'>)');
    }
    
    /**
     * Tests block title display settings.
     */
    public function testHideBlockTitle() : void {
        $block_name = 'system_powered_by_block';
        // Create a random title for the block.
        $title = $this->randomMachineName(8);
        $id = $this->randomMachineName(8);
        // Enable a standard block.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $edit = [
            'id' => $id,
            'region' => 'sidebar_first',
            'settings[label]' => $title,
        ];
        $this->drupalGet('admin/structure/block/add/' . $block_name . '/' . $default_theme);
        $this->submitForm($edit, 'Save block');
        $this->assertSession()
            ->statusMessageContains('The block configuration has been saved.', 'status');
        // Confirm that the block is not displayed by default.
        $this->drupalGet('user');
        $this->assertSession()
            ->pageTextNotContains($title);
        $edit = [
            'settings[label_display]' => TRUE,
        ];
        $this->drupalGet('admin/structure/block/manage/' . $id);
        $this->submitForm($edit, 'Save block');
        $this->assertSession()
            ->statusMessageContains('The block configuration has been saved.', 'status');
        $this->drupalGet('admin/structure/block/manage/' . $id);
        $this->assertSession()
            ->checkboxChecked('edit-settings-label-display');
        // Confirm that the block is displayed when enabled.
        $this->drupalGet('user');
        $this->assertSession()
            ->pageTextContains($title);
    }
    
    /**
     * Moves a block to a given region via the UI and confirms the result.
     *
     * @param array $block
     *   An array of information about the block, including the following keys:
     *   - module: The module providing the block.
     *   - title: The title of the block.
     *   - delta: The block's delta key.
     * @param string $region
     *   The machine name of the theme region to move the block to, for example
     *   'header' or 'sidebar_first'.
     */
    public function moveBlockToRegion(array $block, $region) {
        // Set the created block to a specific region.
        $block += [
            'theme' => $this->config('system.theme')
                ->get('default'),
        ];
        $edit = [];
        $edit['blocks[' . $block['id'] . '][region]'] = $region;
        $this->drupalGet('admin/structure/block');
        $this->submitForm($edit, 'Save blocks');
        // Confirm that the block was moved to the proper region.
        $this->assertSession()
            ->statusMessageContains('The block settings have been updated.', 'status');
        // Confirm that the block is being displayed.
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextContains($block['settings[label]']);
        $region_xpath = [
            'header' => '//header[@role = "banner"]',
            'sidebar_first' => '//aside[contains(@class, "layout-sidebar-first")]',
            'content' => '//div[contains(@class, "layout-content")]',
            'sidebar_second' => '//aside[contains(@class, "layout-sidebar-second")]',
            'footer' => '//footer[@role = "contentinfo"]',
        ];
        // Confirm that the content block was found at the proper region.
        $xpath = $this->assertSession()
            ->buildXPathQuery($region_xpath[$region] . '//div[@id=:block-id]/*', [
            ':block-id' => 'block-' . str_replace('_', '-', strtolower($block['id'])),
        ]);
        $this->assertSession()
            ->elementExists('xpath', $xpath);
    }
    
    /**
     * Tests that cache tags are properly set and bubbled up to the page cache.
     *
     * Verify that invalidation of these cache tags works:
     * - "block:<block ID>"
     * - "block_plugin:<block plugin ID>"
     */
    public function testBlockCacheTags() : void {
        // The page cache only works for anonymous users.
        $this->drupalLogout();
        // Enable page caching.
        $config = $this->config('system.performance');
        $config->set('cache.page.max_age', 300);
        $config->save();
        // Place the "Powered by Drupal" block.
        $block = $this->drupalPlaceBlock('system_powered_by_block', [
            'id' => 'powered',
        ]);
        // Prime the page cache.
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
        // Verify a cache hit, but also the presence of the correct cache tags in
        // both the page and block caches.
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        $cid_parts = [
            Url::fromRoute('<front>', [], [
                'absolute' => TRUE,
            ])->toString(),
            '',
        ];
        $cid = implode(':', $cid_parts);
        $cache_entry = \Drupal::cache('page')->get($cid);
        $expected_cache_tags = [
            'config:block_list',
            'block_view',
            'config:block.block.powered',
            'config:user.role.anonymous',
            'http_response',
            'rendered',
        ];
        sort($expected_cache_tags);
        $keys = \Drupal::service('cache_contexts_manager')->convertTokensToKeys([
            'languages:language_interface',
            'theme',
            'user.permissions',
        ])
            ->getKeys();
        $this->assertSame($expected_cache_tags, $cache_entry->tags);
        $cache_entry = \Drupal::cache('render')->get('entity_view:block:powered:' . implode(':', $keys));
        $expected_cache_tags = [
            'block_view',
            'config:block.block.powered',
            'rendered',
        ];
        sort($expected_cache_tags);
        $this->assertSame($expected_cache_tags, $cache_entry->tags);
        // The "Powered by Drupal" block is modified; verify a cache miss.
        $block->setRegion('content');
        $block->save();
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
        // Now we should have a cache hit again.
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        // Place the "Powered by Drupal" block another time; verify a cache miss.
        $this->drupalPlaceBlock('system_powered_by_block', [
            'id' => 'powered_2',
        ]);
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
        // Verify a cache hit, but also the presence of the correct cache tags.
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        $cid_parts = [
            Url::fromRoute('<front>', [], [
                'absolute' => TRUE,
            ])->toString(),
            '',
        ];
        $cid = implode(':', $cid_parts);
        $cache_entry = \Drupal::cache('page')->get($cid);
        $expected_cache_tags = [
            'config:block_list',
            'block_view',
            'config:block.block.powered',
            'config:block.block.powered_2',
            'config:user.role.anonymous',
            'http_response',
            'rendered',
        ];
        sort($expected_cache_tags);
        $this->assertEquals($expected_cache_tags, $cache_entry->tags);
        $expected_cache_tags = [
            'block_view',
            'config:block.block.powered',
            'rendered',
        ];
        sort($expected_cache_tags);
        $keys = \Drupal::service('cache_contexts_manager')->convertTokensToKeys([
            'languages:language_interface',
            'theme',
            'user.permissions',
        ])
            ->getKeys();
        $cache_entry = \Drupal::cache('render')->get('entity_view:block:powered:' . implode(':', $keys));
        $this->assertSame($expected_cache_tags, $cache_entry->tags);
        $expected_cache_tags = [
            'block_view',
            'config:block.block.powered_2',
            'rendered',
        ];
        sort($expected_cache_tags);
        $keys = \Drupal::service('cache_contexts_manager')->convertTokensToKeys([
            'languages:language_interface',
            'theme',
            'user.permissions',
        ])
            ->getKeys();
        $cache_entry = \Drupal::cache('render')->get('entity_view:block:powered_2:' . implode(':', $keys));
        $this->assertSame($expected_cache_tags, $cache_entry->tags);
        // Now we should have a cache hit again.
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        // Delete the "Powered by Drupal" blocks; verify a cache miss.
        $block_storage = \Drupal::entityTypeManager()->getStorage('block');
        $block_storage->load('powered')
            ->delete();
        $block_storage->load('powered_2')
            ->delete();
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
    }
    
    /**
     * Tests that a link exists to block layout from the appearance form.
     */
    public function testThemeAdminLink() : void {
        $this->drupalPlaceBlock('help_block', [
            'region' => 'help',
        ]);
        $theme_admin = $this->drupalCreateUser([
            'administer blocks',
            'administer themes',
            'access administration pages',
        ]);
        $this->drupalLogin($theme_admin);
        $this->drupalGet('admin/appearance');
        $this->assertSession()
            ->pageTextContains('You can place blocks for each theme on the block layout page');
        $this->assertSession()
            ->linkByHrefExists('admin/structure/block');
    }
    
    /**
     * Tests that uninstalling a theme removes its block configuration.
     */
    public function testUninstallTheme() : void {
        
        /** @var \Drupal\Core\Extension\ThemeInstallerInterface $theme_installer */
        $theme_installer = \Drupal::service('theme_installer');
        $theme_installer->install([
            'claro',
        ]);
        $this->config('system.theme')
            ->set('default', 'claro')
            ->save();
        $block = $this->drupalPlaceBlock('system_powered_by_block', [
            'theme' => 'claro',
            'region' => 'help',
        ]);
        $this->drupalGet('<front>');
        $this->assertSession()
            ->pageTextContains('Powered by Drupal');
        $this->config('system.theme')
            ->set('default', 'stark')
            ->save();
        $theme_installer->uninstall([
            'claro',
        ]);
        // Ensure that the block configuration does not exist anymore.
        $this->assertNull(Block::load($block->id()));
    }
    
    /**
     * Tests the block access.
     */
    public function testBlockAccess() : void {
        $this->drupalPlaceBlock('test_access', [
            'region' => 'help',
        ]);
        $this->drupalGet('<front>');
        $this->assertSession()
            ->pageTextNotContains('Hello test world');
        \Drupal::state()->set('test_block_access', TRUE);
        $this->drupalGet('<front>');
        $this->assertSession()
            ->pageTextContains('Hello test world');
    }
    
    /**
     * Tests block_user_role_delete.
     */
    public function testBlockUserRoleDelete() : void {
        $role1 = Role::create([
            'id' => 'test_role1',
            'label' => 'Test role 1',
        ]);
        $role1->save();
        $role2 = Role::create([
            'id' => 'test_role2',
            'label' => 'Test role 2',
        ]);
        $role2->save();
        $block = Block::create([
            'id' => $this->randomMachineName(),
            'plugin' => 'system_powered_by_block',
            'theme' => 'stark',
        ]);
        $block->setVisibilityConfig('user_role', [
            'roles' => [
                $role1->id() => $role1->id(),
                $role2->id() => $role2->id(),
            ],
        ]);
        $block->save();
        $this->assertEquals([
            $role1->id() => $role1->id(),
            $role2->id() => $role2->id(),
        ], $block->getVisibility()['user_role']['roles']);
        $role1->delete();
        $block = Block::load($block->id());
        $this->assertEquals([
            $role2->id() => $role2->id(),
        ], $block->getVisibility()['user_role']['roles']);
    }
    
    /**
     * Tests block title.
     */
    public function testBlockTitle() : void {
        // Create a custom title for the block.
        $title = "This block's <b>great!</b>";
        // Enable a standard block.
        $default_theme = $this->config('system.theme')
            ->get('default');
        $edit = [
            'id' => 'test',
            'region' => 'sidebar_first',
            'settings[label]' => $title,
            'settings[label_display]' => TRUE,
        ];
        // Set the block to be shown only to authenticated users.
        $edit['visibility[user_role][roles][' . RoleInterface::AUTHENTICATED_ID . ']'] = TRUE;
        $this->drupalGet('admin/structure/block/add/foo/' . $default_theme);
        $this->submitForm($edit, 'Save block');
        // Ensure that the title is displayed as plain text.
        $elements = $this->xpath('//table/tbody/tr//td[contains(@class, "block")]');
        $this->assertEquals($title, $elements[0]->getText());
        $this->clickLink('Disable');
        $elements = $this->xpath('//table/tbody/tr//td[contains(@class, "block")]');
        $this->assertEquals("{$title} (disabled)", $elements[0]->getText());
    }

}