Club Drupal

  /**

   * Add a second ER field from node/article to taxonomy.

   *

   * This should not cause {taxonomy_index} to receive duplicate entries.

   */

  protected function setupForIndexDuplicates() {

    // Create an entity reference field.

    $field = array(

      'entity_types' => array('node'),

      'settings' => array(

        'handler' => 'base',

        'target_type' => 'taxonomy_term',

        'handler_settings' => array(

          'target_bundles' => array(),

        ),

      ),

      'field_name' => 'field_entityreference_term2',

      'type' => 'entityreference',

    );

    $field = field_create_field($field);

    $instance = array(

      'field_name' => 'field_entityreference_term2',

      'bundle' => 'article',

      'entity_type' => 'node',

    );

    // Enable the taxonomy-index behavior.

    $instance['settings']['behaviors']['taxonomy-index']['status'] = TRUE;

    field_create_instance($instance);

  }

  /**

   * Make sure the index only contains one entry for a given node->term

   * reference, even when multiple ER fields link from the node bundle to terms.

   */

  public function testIndexDuplicates() {

    // Extra setup for this test: add another ER field on this content type.

    $this->setupForIndexDuplicates();

    // Assert node insert with reference to term in first field.

    $tid = 1;

    $settings = array();

    $settings['type'] = 'article';

    $settings['field_entityreference_term'][LANGUAGE_NONE][0]['target_id'] = $tid;

    $node = $this->drupalCreateNode($settings);

    $this->assertEqual(taxonomy_select_nodes($tid), array($node->nid));

  }