Issue #3311425 by jonathan1055: Replace warning for no entity type with an explanation in the menu

      $publishing_enabled_types = $this->schedulerManager->getEnabledTypes($entityTypeId, 'publish');

      $unpublishing_enabled_types = $this->schedulerManager->getEnabledTypes($entityTypeId, 'unpublish');

      // $plugin->getTypes() will usually give a non-empty array of values, but

      // it can be empty if no default bundle type is defined, or all types have

      // been deleted.

      if (!$types = $plugin->getTypes()) {

      // When a module is enabled via drush there is no automatic clear cache.

      // Thus moduleHandler()->moduleExists({module}) can return false when

      // the module is actually enabled. This means we get nothing for

      // plugin->getTypes() and processing should stop with a useful exception

        // message, instead of letting Core give a confusing exception.

        $bundle_type = $this->entityTypeManager->getDefinition($entityTypeId)->getBundleEntityType();

        $type_definition = $this->entityTypeManager->getDefinition($bundle_type, FALSE);

        if (!$type_definition) {

          throw new \Exception(sprintf('Invalid or empty entity type definition for %s module. Do a full cache clear via admin/config/development/performance or drush cr.', $plugin->dependency()));

      // message, instead of letting Core give a confusing exception later.

      $bundle_id = $this->entityTypeManager->getDefinition($entityTypeId)->getBundleEntityType();

      $entity_type_definition = $this->entityTypeManager->getDefinition($bundle_id, FALSE);

      if (!$entity_type_definition) {

        throw new \Exception(sprintf('Invalid or empty %s entity type definition for %s module. Do a full cache clear via admin/config/development/performance or drush cr.', $bundle_id, $plugin->dependency()));

      }

      $collection_label = (string) ($entity_type_definition->get('label_collection') ?: $entity_type_definition->get('label'));

      // $plugin->getTypes() will usually give a non-empty array of values, but

      // it can be empty if no default bundle type is defined, or all types have

      // been deleted.

      if (!$types = $plugin->getTypes()) {

        // Some modules may not create a default entity type during installation

        // or the entity type definitions may have been deleted. This is not an

        // exception, but will cause an error if we do not stop this loop.

        $message_parms = [

          '%module' => $plugin->dependency(),

          '%plugin_label' => $plugin->label(),

          '%bundle_id' => $bundle_id,

        ];

        $this->logger('scheduler')->warning('No entity types returned by %module module for use in %plugin_label', $message_parms);

        $this->messenger()->addWarning($this->t('No entity types returned by %module module for use in %plugin_label', $message_parms));

        $this->logger('scheduler')->notice('No %bundle_id entity types returned by %module module for use in %plugin_label', $message_parms);

        $links[] = ['title' => "-- $collection_label --  (" . $this->t('no entity types defined') . ')'];

        continue;

      }

      $bundle_id = reset($types)->bundle();

      $entity_type_definition = $this->entityTypeManager->getStorage($bundle_id)->getEntityType();

      $collection_label = (string) ($entity_type_definition->get('label_collection') ?: $entity_type_definition->get('label'));

      $links[] = ['title' => "-- $collection_label --"];

      foreach ($types as $id => $type) {

        $text = [];

  public function testAdminSettings() {

    $this->drupalLogin($this->adminUser);

    // Check that we get the warning when no media types exist.

    // Check that menu links exists for the node entity types, and that we are

    // informed that no media types or taxonomy vocabularies exist.

    $this->drupalGet('admin/config/content/scheduler');

    $this->assertSession()->pageTextContains('No entity types returned by media module for use in Media Scheduler Plugin');

    $this->assertSession()->linkExists("{$this->typeName} (publishing, unpublishing)");

    $this->assertSession()->linkExists("{$this->nonSchedulerTypeName}");

    $this->assertSession()->pageTextContains('-- Media types -- (no entity types defined)');

    $this->assertSession()->pageTextContains('-- Taxonomy -- (no entity types defined)');

    // Call the setUp functions for all entity types.

    $this->schedulerMediaSetUp();

    $this->SchedulerCommerceProductSetUp();

    $this->SchedulerTaxonomyTermSetUp();

    // Check that the drop-down information has been updated.

    $this->drupalGet('admin/config/content/scheduler');

    $this->assertSession()->pageTextNotContains('-- Media types -- (no entity types defined)');

    $this->assertSession()->linkExists("{$this->mediaTypeLabel} (publishing, unpublishing)");

    $this->assertSession()->linkExists("{$this->nonSchedulerMediaTypeLabel}");

    $this->assertSession()->pageTextNotContains('-- Taxonomy -- (no entity types defined)');

    $this->assertSession()->pageTextContains("{$this->vocabularyName} (publishing, unpublishing)");

    $this->assertSession()->linkExists("{$this->nonSchedulerVocabularyName}");

    // Verify that the default values are as expected.

    $this->assertFalse($this->config('scheduler.settings')->get('allow_date_only'), 'The default setting for allow_date_only is False.');