View source  
  <?php
namespace Drupal\taxonomy\Tests\Views;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\field\Tests\EntityReference\EntityReferenceTestTrait;
use Drupal\views\Tests\ViewTestBase;
use Drupal\views\Tests\ViewTestData;
abstract class TaxonomyTestBase extends ViewTestBase {
  use EntityReferenceTestTrait;
  
  public static $modules = array(
    'taxonomy',
    'taxonomy_test_views',
  );
  
  protected $nodes = array();
  
  protected $vocabulary;
  
  protected $term1;
  
  protected $term2;
  protected function setUp() {
    parent::setUp();
    $this
      ->mockStandardInstall();
    ViewTestData::createTestViews(get_class($this), array(
      'taxonomy_test_views',
    ));
    $this->term1 = $this
      ->createTerm();
    $this->term2 = $this
      ->createTerm();
    $node = array();
    $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);
  }
  
  protected function mockStandardInstall() {
    $this
      ->drupalCreateContentType(array(
      'type' => 'article',
    ));
    
    $this->vocabulary = entity_create('taxonomy_vocabulary', array(
      'name' => 'Views testing tags',
      'vid' => 'views_testing_tags',
    ));
    $this->vocabulary
      ->save();
    $field_name = 'field_' . $this->vocabulary
      ->id();
    $handler_settings = array(
      'target_bundles' => array(
        $this->vocabulary
          ->id() => $this->vocabulary
          ->id(),
      ),
      'auto_create' => TRUE,
    );
    $this
      ->createEntityReferenceField('node', 'article', $field_name, 'Tags', 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
    entity_get_form_display('node', 'article', 'default')
      ->setComponent($field_name, array(
      'type' => 'entity_reference_autocomplete_tags',
      'weight' => -4,
    ))
      ->save();
    entity_get_display('node', 'article', 'default')
      ->setComponent($field_name, array(
      'type' => 'entity_reference_label',
      'weight' => 10,
    ))
      ->save();
    entity_get_display('node', 'article', 'teaser')
      ->setComponent($field_name, array(
      'type' => 'entity_reference_label',
      'weight' => 10,
    ))
      ->save();
  }
  
  protected function createTerm(array $settings = []) {
    $filter_formats = filter_formats();
    $format = array_pop($filter_formats);
    $settings += [
      'name' => $this
        ->randomMachineName(),
      'description' => $this
        ->randomMachineName(),
      
      'format' => $format
        ->id(),
      'vid' => $this->vocabulary
        ->id(),
      'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
    ];
    $term = entity_create('taxonomy_term', $settings);
    $term
      ->save();
    return $term;
  }
}