/**
  * Tests term indentation.
  */
 function testTermIndentation()
 {
     // Create three taxonomy terms.
     $term1 = $this->createTerm($this->vocabulary);
     $term2 = $this->createTerm($this->vocabulary);
     $term3 = $this->createTerm($this->vocabulary);
     // Get the taxonomy storage.
     $taxonomy_storage = $this->container->get('entity.manager')->getStorage('taxonomy_term');
     // Indent the second term under the first one.
     $edit = array('terms[tid:' . $term2->id() . ':0][term][tid]' => 2, 'terms[tid:' . $term2->id() . ':0][term][parent]' => 1, 'terms[tid:' . $term2->id() . ':0][term][depth]' => 1, 'terms[tid:' . $term2->id() . ':0][weight]' => 1);
     // Submit the edited form and check for HTML indentation element presence.
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->get('vid') . '/overview', $edit, t('Save'));
     $this->assertPattern('|<div class="js-indentation indentation">&nbsp;</div>|');
     // Check explicitly that term 2's parent is term 1.
     $parents = $taxonomy_storage->loadParents($term2->id());
     $this->assertEqual(key($parents), 1, 'Term 1 is the term 2\'s parent');
     // Move the second term back out to the root level.
     $edit = array('terms[tid:' . $term2->id() . ':0][term][tid]' => 2, 'terms[tid:' . $term2->id() . ':0][term][parent]' => 0, 'terms[tid:' . $term2->id() . ':0][term][depth]' => 0, 'terms[tid:' . $term2->id() . ':0][weight]' => 1);
     $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->get('vid') . '/overview', $edit, t('Save'));
     // All terms back at the root level, no indentation should be present.
     $this->assertNoPattern('|<div class="js-indentation indentation">&nbsp;</div>|');
     // Check explicitly that term 2 has no parents.
     \Drupal::entityManager()->getStorage('taxonomy_term')->resetCache();
     $parents = $taxonomy_storage->loadParents($term2->id());
     $this->assertTrue(empty($parents), 'Term 2 has no parents now');
 }