class TaxonomyTestBase

abstract class TaxonomyTestBase extends ViewsKernelTestBase {
  use EntityReferenceTestTrait;
  use UserCreationTrait;
  use NodeCreationTrait {
    createNode as drupalCreateNode;
  }
  use ContentTypeCreationTrait {
    createContentType as drupalCreateContentType;
  }
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'taxonomy',
    'taxonomy_test_views',
    'text',
    'node',
    'field',
    'filter',
  ];
  
  /**
   * Stores the nodes used for the different tests.
   *
   * @var \Drupal\node\NodeInterface[]
   */
  protected $nodes = [];
  
  /**
   * The vocabulary used for creating terms.
   *
   * @var \Drupal\taxonomy\VocabularyInterface
   */
  protected $vocabulary;
  
  /**
   * Stores the first term used in the different tests.
   *
   * @var \Drupal\taxonomy\TermInterface
   */
  protected $term1;
  
  /**
   * Stores the second term used in the different tests.
   *
   * @var \Drupal\taxonomy\TermInterface
   */
  protected $term2;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp($import_test_views = TRUE) {
    parent::setUp($import_test_views);
    // Install node config to create body field.
    $this->installEntitySchema('node');
    $this->installConfig([
      'node',
      'filter',
      'taxonomy',
    ]);
    $this->installEntitySchema('user');
    $this->installEntitySchema('taxonomy_term');
    $this->mockStandardInstall();
    if ($import_test_views) {
      ViewTestData::createTestViews(static::class, [
        'taxonomy_test_views',
      ]);
    }
    $this->term1 = $this->createTerm();
    $this->term2 = $this->createTerm();
    $node = [];
    $node['type'] = 'article';
    $node['field_views_testing_tags'][]['target_id'] = $this->term1
      ->id();
    $node['field_views_testing_tags'][]['target_id'] = $this->term2
      ->id();
    $this->nodes[] = $this->drupalCreateNode($node);
    $this->nodes[] = $this->drupalCreateNode($node);
  }
  
  /**
   * Provides a workaround for the inability to use the standard profile.
   *
   * @see https://www.drupal.org/node/1708692
   */
  protected function mockStandardInstall() {
    $this->drupalCreateContentType([
      'type' => 'article',
    ]);
    // Create the vocabulary for the tag field.
    $this->vocabulary = Vocabulary::create([
      'name' => 'Views testing tags',
      'vid' => 'views_testing_tags',
    ]);
    $this->vocabulary
      ->save();
    $field_name = 'field_' . $this->vocabulary
      ->id();
    $handler_settings = [
      'target_bundles' => [
        $this->vocabulary
          ->id() => $this->vocabulary
          ->id(),
      ],
      'auto_create' => TRUE,
    ];
    $this->installEntitySchema('node');
    $this->createEntityReferenceField('node', 'article', $field_name, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
    $entity_type_manager = $this->container
      ->get('entity_type.manager');
    $entity_type_manager->getStorage('entity_form_display')
      ->load('node.article.default')
      ->setComponent($field_name, [
      'type' => 'entity_reference_autocomplete_tags',
      'weight' => -4,
    ])
      ->save();
    $view_modes = [
      'default',
      'teaser',
    ];
    foreach ($view_modes as $view_mode) {
      $entity_type_manager->getStorage('entity_view_display')
        ->load("node.article.{$view_mode}")
        ->setComponent($field_name, [
        'type' => 'entity_reference_label',
        'weight' => 10,
      ])
        ->save();
    }
  }
  
  /**
   * Creates and returns a taxonomy term.
   *
   * @param array $settings
   *   (optional) An array of values to override the following default
   *   properties of the term:
   *   - name: A random string.
   *   - description: A random string.
   *   - format: First available text format.
   *   - vid: Vocabulary ID of self::$vocabulary object.
   *   - langcode: LANGCODE_NOT_SPECIFIED.
   *   Defaults to an empty array.
   *
   * @return \Drupal\taxonomy\Entity\Term
   *   The created taxonomy term.
   */
  protected function createTerm(array $settings = []) {
    $filter_formats = filter_formats();
    $format = array_pop($filter_formats);
    $settings += [
      'name' => $this->randomMachineName(),
      'description' => $this->randomMachineName(),
      // Use the first available text format.
'format' => $format->id(),
      'vid' => $this->vocabulary
        ->id(),
      'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
    ];
    $term = Term::create($settings);
    $term->save();
    return $term;
  }

}