Issue #2407765 by Wim Leers, borisson_: Wherever simple config is used to render output to end user, associate their cache tags

core/modules/block/src/Tests/BlockSystemBrandingTest.php

@@ -51,6 +51,7 @@ class BlockSystemBrandingTest extends BlockTestBase {
     $this->assertTrue(!empty($site_logo_element), 'The branding block logo was found.');
     $this->assertTrue(!empty($site_name_element), 'The branding block site name was found.');
     $this->assertTrue(!empty($site_slogan_element), 'The branding block slogan was found.');
+    $this->assertCacheTag('config:system.site');
 
     // Turn just the logo off.
     $this->config('block.block.site-branding')
@@ -64,6 +65,7 @@ class BlockSystemBrandingTest extends BlockTestBase {
     $this->assertTrue(empty($site_logo_element), 'The branding block logo was disabled.');
     $this->assertTrue(!empty($site_name_element), 'The branding block site name was found.');
     $this->assertTrue(!empty($site_slogan_element), 'The branding block slogan was found.');
+    $this->assertCacheTag('config:system.site');
 
     // Turn just the site name off.
     $this->config('block.block.site-branding')
@@ -78,6 +80,7 @@ class BlockSystemBrandingTest extends BlockTestBase {
     $this->assertTrue(!empty($site_logo_element), 'The branding block logo was found.');
     $this->assertTrue(empty($site_name_element), 'The branding block site name was disabled.');
     $this->assertTrue(!empty($site_slogan_element), 'The branding block slogan was found.');
+    $this->assertCacheTag('config:system.site');
 
     // Turn just the site slogan off.
     $this->config('block.block.site-branding')
@@ -92,6 +95,7 @@ class BlockSystemBrandingTest extends BlockTestBase {
     $this->assertTrue(!empty($site_logo_element), 'The branding block logo was found.');
     $this->assertTrue(!empty($site_name_element), 'The branding block site name was found.');
     $this->assertTrue(empty($site_slogan_element), 'The branding block slogan was disabled.');
+    $this->assertCacheTag('config:system.site');
 
     // Turn the site name and the site slogan off.
     $this->config('block.block.site-branding')
@@ -106,6 +110,7 @@ class BlockSystemBrandingTest extends BlockTestBase {
     $this->assertTrue(!empty($site_logo_element), 'The branding block logo was found.');
     $this->assertTrue(empty($site_name_element), 'The branding block site name was disabled.');
     $this->assertTrue(empty($site_slogan_element), 'The branding block slogan was disabled.');
+    $this->assertCacheTag('config:system.site');
   }
 
 }

core/modules/book/src/BookManager.php

@@ -317,7 +317,8 @@ class BookManager implements BookManagerInterface {
    *   A parent selection form element.
    */
   protected function addParentSelectFormElements(array $book_link) {
-    if ($this->configFactory->get('book.settings')->get('override_parent_selector')) {
+    $config = $this->configFactory->get('book.settings');
+    if ($config->get('override_parent_selector')) {
       return array();
     }
     // Offer a message or a drop-down to choose a different parent page.
@@ -352,6 +353,7 @@ class BookManager implements BookManagerInterface {
         '#suffix' => '</div>',
       );
     }
+    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
 
     return $form;
   }

core/modules/book/src/Tests/BookTest.php

@@ -143,6 +143,11 @@ class BookTest extends WebTestBase {
 
     $this->drupalLogout();
     $this->drupalLogin($this->bookAuthor);
+
+    // Check the presence of expected cache tags.
+    $this->drupalGet('node/add/book');
+    $this->assertCacheTag('config:book.settings');
+
     /*
      * Add Node 5 under Node 3.
      * Book
@@ -153,8 +158,6 @@ class BookTest extends WebTestBase {
      *   |- Node 5
      *  |- Node 4
      */
-
-
     $nodes[] = $this->createBookNode($book->id(), $nodes[3]->book['nid']); // Node 5.
     $this->drupalLogout();
     $this->drupalLogin($this->webUser);

core/modules/comment/src/CommentForm.php

@@ -10,6 +10,7 @@ namespace Drupal\comment;
 use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
 use Drupal\Component\Utility\String;
 use Drupal\Component\Utility\Unicode;
+use Drupal\Core\Cache\Cache;
 use Drupal\Core\Datetime\DrupalDateTime;
 use Drupal\Core\Entity\ContentEntityForm;
 use Drupal\Core\Entity\EntityManagerInterface;
@@ -78,6 +79,7 @@ class CommentForm extends ContentEntityForm {
     $entity = $this->entityManager->getStorage($comment->getCommentedEntityTypeId())->load($comment->getCommentedEntityId());
     $field_name = $comment->getFieldName();
     $field_definition = $this->entityManager->getFieldDefinitions($entity->getEntityTypeId(), $entity->bundle())[$comment->getFieldName()];
+    $config = $this->config('user.settings');
 
     // Use #comment-form as unique jump target, regardless of entity type.
     $form['#id'] = drupal_html_id('comment_form');
@@ -147,7 +149,7 @@ class CommentForm extends ContentEntityForm {
     );
     if ($is_admin) {
       $form['author']['name']['#title'] = $this->t('Authored by');
-      $form['author']['name']['#description'] = $this->t('Leave blank for %anonymous.', array('%anonymous' => $this->config('user.settings')->get('anonymous')));
+      $form['author']['name']['#description'] = $this->t('Leave blank for %anonymous.', array('%anonymous' => $config->get('anonymous')));
       $form['author']['name']['#autocomplete_route_name'] = 'user.autocomplete';
     }
     elseif ($this->currentUser->isAuthenticated()) {
@@ -157,7 +159,7 @@ class CommentForm extends ContentEntityForm {
       $form['author']['name']['#account'] = $this->currentUser;
     }
     elseif($this->currentUser->isAnonymous()) {
-      $form['author']['name']['#attributes']['data-drupal-default-value'] = $this->config('user.settings')->get('anonymous');
+      $form['author']['name']['#attributes']['data-drupal-default-value'] = $config->get('anonymous');
     }
 
     // Add author email and homepage fields depending on the current user.
@@ -201,6 +203,8 @@ class CommentForm extends ContentEntityForm {
       '#access' => $is_admin,
     );
 
+    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
+
     return parent::form($form, $form_state, $comment);
   }
 

core/modules/comment/src/CommentViewBuilder.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\comment;
 
+use Drupal\Core\Cache\Cache;
 use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityViewBuilder;
@@ -102,7 +103,9 @@ class CommentViewBuilder extends EntityViewBuilder {
       }
 
       $account = comment_prepare_author($entity);
-      if (\Drupal::config('user.settings')->get('signatures') && $account->getSignature()) {
+      $config = \Drupal::config('user.settings');
+      $build['#cache']['tags'] = Cache::mergeTags(isset($build['#cache']['tags']) ? $build['#cache']['tags'] : [],  $config->getCacheTags());
+      if ($config->get('signatures') && $account->getSignature()) {
         $build[$id]['signature'] = array(
           '#type' => 'processed_text',
           '#text' => $account->getSignature(),

core/modules/comment/src/Tests/CommentAnonymousTest.php

@@ -56,6 +56,9 @@ class CommentAnonymousTest extends CommentTestBase {
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
     $this->assertTrue($this->commentContactInfoAvailable(), 'Contact information available.');
 
+    // Check the presence of expected cache tags.
+    $this->assertCacheTag('config:user.settings');
+
     $anonymous_comment2 = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName());
     $this->assertTrue($this->commentExists($anonymous_comment2), 'Anonymous comment with contact info (optional) found.');
 

core/modules/comment/src/Tests/CommentDefaultFormatterCacheTagsTest.php

@@ -110,6 +110,7 @@ class CommentDefaultFormatterCacheTagsTest extends EntityUnitTestBase {
       'comment_view',
       'comment:' . $comment->id(),
       'config:filter.format.plain_text',
+      'config:user.settings',
       'user_view',
       'user:2',
     );

core/modules/contact/src/Controller/ContactController.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\contact\Controller;
 
+use Drupal\Core\Cache\Cache;
 use Drupal\Core\Controller\ControllerBase;
 use Drupal\Core\Datetime\DateFormatter;
 use Drupal\Core\Flood\FloodInterface;
@@ -77,12 +78,13 @@ class ContactController extends ControllerBase {
     if (!$this->currentUser()->hasPermission('administer contact forms')) {
       $this->contactFloodControl();
     }
+    $config = $this->config('contact.settings');
 
     // Use the default form if no form has been passed.
     if (empty($contact_form)) {
       $contact_form = $this->entityManager()
         ->getStorage('contact_form')
-        ->load($this->config('contact.settings')->get('default_form'));
+        ->load($config->get('default_form'));
       // If there are no forms, do not display the form.
       if (empty($contact_form)) {
         if ($this->currentUser()->hasPermission('administer contact forms')) {
@@ -104,6 +106,7 @@ class ContactController extends ControllerBase {
 
     $form = $this->entityFormBuilder()->getForm($message);
     $form['#title'] = String::checkPlain($contact_form->label());
+    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
     return $form;
   }
 

core/modules/contact/src/Tests/ContactSitewideTest.php

@@ -54,6 +54,10 @@ class ContactSitewideTest extends WebTestBase {
     ));
     $this->drupalLogin($admin_user);
 
+    // Check the presence of expected cache tags.
+    $this->drupalGet('contact');
+    $this->assertCacheTag('config:contact.settings');
+
     $flood_limit = 3;
     $this->config('contact.settings')
       ->set('flood.limit', $flood_limit)

core/modules/forum/src/Controller/ForumController.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\forum\Controller;
 
+use Drupal\Core\Cache\Cache;
 use Drupal\Core\Controller\ControllerBase;
 use Drupal\Core\Entity\EntityAccessControlHandlerInterface;
 use Drupal\Core\Entity\EntityStorageInterface;
@@ -190,6 +191,7 @@ class ForumController extends ControllerBase {
     if (empty($term->forum_container->value)) {
       $build['#attached']['feed'][] = array('taxonomy/term/' . $term->id() . '/feed', 'RSS - ' . $term->getName());
     }
+    $build['#cache']['tags'] = Cache::mergeTags(isset($build['#cache']['tags']) ? $build['#cache']['tags'] : [],  $config->getCacheTags());
 
     return [
       'action' => $this->buildActionLinks($config->get('vocabulary'), $term),

core/modules/forum/src/Tests/ForumTest.php

@@ -119,6 +119,12 @@ class ForumTest extends WebTestBase {
     // Look for the "General discussion" default forum
     $this->assertRaw(t('<a href="'. Url::fromRoute('forum.page', ['taxonomy_term' => 1])->toString() .'">General discussion</a>'), "Found the default forum at the /forum listing");
 
+    // Check the presence of expected cache tags.
+    $this->assertCacheTag('config:forum.settings');
+
+    $this->drupalGet(Url::fromRoute('forum.page', ['taxonomy_term' => 1]));
+    $this->assertCacheTag('config:forum.settings');
+
     // Do the admin tests.
     $this->doAdminTests($this->admin_user);
 

core/modules/simpletest/src/WebTestBase.php

@@ -2733,4 +2733,16 @@ abstract class WebTestBase extends TestBase {
       return $this->getAbsoluteUrl($path);
     }
   }
+
+  /**
+   * Asserts whether an expected cache tag was present in the last response.
+   *
+   * @param string $expected_cache_tag
+   *   The expected cache tag.
+   */
+  protected function assertCacheTag($expected_cache_tag) {
+    $cache_tags = explode(' ', $this->drupalGetHeader('X-Drupal-Cache-Tags'));
+    $this->assertTrue(in_array($expected_cache_tag, $cache_tags));
+  }
+
 }

core/modules/system/src/Plugin/Block/SystemBrandingBlock.php

@@ -8,6 +8,7 @@
 namespace Drupal\system\Plugin\Block;
 
 use Drupal\Core\Block\BlockBase;
+use Drupal\Core\Cache\Cache;
 use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
@@ -189,11 +190,10 @@ class SystemBrandingBlock extends BlockBase implements ContainerFactoryPluginInt
    * {@inheritdoc}
    */
   public function getCacheTags() {
-    // The theme-specific cache tag is set automatically for each block, but the
-    // output of this block also depends on the global theme settings.
-    $cache_tags = parent::getCacheTags();
-    $cache_tags[] = 'theme_global_setting';
-    return $cache_tags;
+    return Cache::mergeTags(
+      parent::getCacheTags(),
+      $this->configFactory->get('system.site')->getCacheTags()
+    );
   }
 
 }

core/modules/system/src/Tests/Cache/PageCacheTagsIntegrationTest.php

@@ -99,6 +99,7 @@ class PageCacheTagsIntegrationTest extends WebTestBase {
       'config:system.menu.tools',
       'config:system.menu.footer',
       'config:system.menu.main',
+      'config:system.site',
     ));
 
     // Full node page 2.
@@ -132,6 +133,7 @@ class PageCacheTagsIntegrationTest extends WebTestBase {
       'config:system.menu.tools',
       'config:system.menu.footer',
       'config:system.menu.main',
+      'config:system.site',
     ));
   }
 

core/modules/user/src/AccountForm.php

@@ -74,6 +74,7 @@ abstract class AccountForm extends ContentEntityForm {
     $account = $this->entity;
     $user = $this->currentUser();
     $config = \Drupal::config('user.settings');
+    $form['#cache']['tags'] = $config->getCacheTags();
 
     $language_interface = \Drupal::languageManager()->getCurrentLanguage();
     $register = $account->isAnonymous();

core/modules/user/src/Form/UserLoginForm.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\user\Form;
 
+use Drupal\Core\Cache\Cache;
 use Drupal\Core\Flood\FloodInterface;
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
@@ -78,13 +79,15 @@ class UserLoginForm extends FormBase {
    * {@inheritdoc}
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
+    $config = $this->config('system.site');
+
     // Display login form:
     $form['name'] = array(
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
       '#size' => 60,
       '#maxlength' => USERNAME_MAX_LENGTH,
-      '#description' => $this->t('Enter your @s username.', array('@s' => $this->config('system.site')->get('name'))),
+      '#description' => $this->t('Enter your @s username.', array('@s' => $config->get('name'))),
       '#required' => TRUE,
       '#attributes' => array(
         'autocorrect' => 'off',
@@ -109,6 +112,8 @@ class UserLoginForm extends FormBase {
     $form['#validate'][] = '::validateAuthentication';
     $form['#validate'][] = '::validateFinal';
 
+    $form['#cache']['tags'] = Cache::mergeTags(isset($form['#cache']['tags']) ? $form['#cache']['tags'] : [],  $config->getCacheTags());
+
     return $form;
   }
 

core/modules/user/src/Tests/UserLoginTest.php

@@ -16,10 +16,16 @@ use Drupal\Core\Password\PhpassHashedPassword;
  * @group user
  */
 class UserLoginTest extends WebTestBase {
+
   /**
    * Tests login with destination.
    */
-  function testLoginDestination() {
+  function testLoginCacheTagsAndDestination() {
+    $this->drupalGet('user/login');
+    // The user login form says "Enter your <site name> username.", hence it
+    // depends on config:system.site, and its cache tags should be present.
+    $this->assertCacheTag('config:system.site');
+
     $user = $this->drupalCreateUser(array());
     $this->drupalGet('user/login', array('query' => array('destination' => 'foo')));
     $edit = array('name' => $user->getUserName(), 'pass' => $user->pass_raw);

core/modules/user/src/Tests/UserRegistrationTest.php

@@ -169,6 +169,9 @@ class UserRegistrationTest extends WebTestBase {
     $this->drupalGet('user/register');
     $this->assertNoRaw('<details id="edit-account"><summary>Account information</summary>');
 
+    // Check the presence of expected cache tags.
+    $this->assertCacheTag('config:user.settings');
+
     $edit = array();
     $edit['name'] = $name = $this->randomMachineName();
     $edit['mail'] = $mail = $edit['name'] . '@example.com';