annotate core/modules/taxonomy/tests/src/Functional/TermTest.php @ 19:fa3358dc1485 tip

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<?php

namespace Drupal\Tests\taxonomy\Functional;

use Drupal\Component\Utility\Tags;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\field\Entity\FieldConfig;
use Drupal\taxonomy\Entity\Term;
use Drupal\taxonomy\Entity\Vocabulary;

/**
 * Tests load, save and delete for taxonomy terms.
 *
 * @group taxonomy
 */
class TermTest extends TaxonomyTestBase {

  /**
   * Vocabulary for testing.
   *
   * @var \Drupal\taxonomy\VocabularyInterface
   */
  protected $vocabulary;

  /**
   * Taxonomy term reference field for testing.
   *
   * @var \Drupal\field\FieldConfigInterface
   */
  protected $field;

  /**
   * Modules to enable.
   *
   * @var string[]
   */
  public static $modules = ['block'];

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();

    $this->drupalPlaceBlock('local_actions_block');
    $this->drupalPlaceBlock('local_tasks_block');
    $this->drupalPlaceBlock('page_title_block');

    $this->drupalLogin($this->drupalCreateUser(['administer taxonomy', 'bypass node access']));
    $this->vocabulary = $this->createVocabulary();

    $field_name = 'taxonomy_' . $this->vocabulary->id();

    $handler_settings = [
      'target_bundles' => [
        $this->vocabulary->id() => $this->vocabulary->id(),
      ],
      'auto_create' => TRUE,
    ];
    $this->createEntityReferenceField('node', 'article', $field_name, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
    $this->field = FieldConfig::loadByName('node', 'article', $field_name);

    entity_get_form_display('node', 'article', 'default')
      ->setComponent($field_name, [
        'type' => 'options_select',
      ])
      ->save();
    entity_get_display('node', 'article', 'default')
      ->setComponent($field_name, [
        'type' => 'entity_reference_label',
      ])
      ->save();
  }

  /**
   * The "parent" field must restrict references to the same vocabulary.
   */
  public function testParentHandlerSettings() {
    $vocabulary_fields = \Drupal::service('entity_field.manager')->getFieldDefinitions('taxonomy_term', $this->vocabulary->id());
    $parent_target_bundles = $vocabulary_fields['parent']->getSetting('handler_settings')['target_bundles'];
    $this->assertIdentical([$this->vocabulary->id() => $this->vocabulary->id()], $parent_target_bundles);
  }

  /**
   * Test terms in a single and multiple hierarchy.
   */
  public function testTaxonomyTermHierarchy() {
    // Create two taxonomy terms.
    $term1 = $this->createTerm($this->vocabulary);
    $term2 = $this->createTerm($this->vocabulary);

    // Get the taxonomy storage.
    /** @var \Drupal\taxonomy\TermStorageInterface $taxonomy_storage */
    $taxonomy_storage = $this->container->get('entity_type.manager')->getStorage('taxonomy_term');

    // Check that hierarchy is flat.
    $this->assertEquals(0, $taxonomy_storage->getVocabularyHierarchyType($this->vocabulary->id()), 'Vocabulary is flat.');

    // Edit $term2, setting $term1 as parent.
    $edit = [];
    $edit['parent[]'] = [$term1->id()];
    $this->drupalPostForm('taxonomy/term/' . $term2->id() . '/edit', $edit, t('Save'));

    // Check the hierarchy.
    $children = $taxonomy_storage->loadChildren($term1->id());
    $parents = $taxonomy_storage->loadParents($term2->id());
    $this->assertTrue(isset($children[$term2->id()]), 'Child found correctly.');
    $this->assertTrue(isset($parents[$term1->id()]), 'Parent found correctly.');

    // Load and save a term, confirming that parents are still set.
    $term = Term::load($term2->id());
    $term->save();
    $parents = $taxonomy_storage->loadParents($term2->id());
    $this->assertTrue(isset($parents[$term1->id()]), 'Parent found correctly.');

    // Create a third term and save this as a parent of term2.
    $term3 = $this->createTerm($this->vocabulary);
    $term2->parent = [$term1->id(), $term3->id()];
    $term2->save();
    $parents = $taxonomy_storage->loadParents($term2->id());
    $this->assertTrue(isset($parents[$term1->id()]) && isset($parents[$term3->id()]), 'Both parents found successfully.');
  }

  /**
   * Tests that many terms with parents show on each page
   */
  public function testTaxonomyTermChildTerms() {
    // Set limit to 10 terms per page. Set variable to 9 so 10 terms appear.
    $this->config('taxonomy.settings')->set('terms_per_page_admin', '9')->save();
    $term1 = $this->createTerm($this->vocabulary);
    $terms_array = [];

    $taxonomy_storage = $this->container->get('entity.manager')->getStorage('taxonomy_term');

    // Create 40 terms. Terms 1-12 get parent of $term1. All others are
    // individual terms.
    for ($x = 1; $x <= 40; $x++) {
      $edit = [];
      // Set terms in order so we know which terms will be on which pages.
      $edit['weight'] = $x;

      // Set terms 1-20 to be children of first term created.
      if ($x <= 12) {
        $edit['parent'] = $term1->id();
      }
      $term = $this->createTerm($this->vocabulary, $edit);
      $children = $taxonomy_storage->loadChildren($term1->id());
      $parents = $taxonomy_storage->loadParents($term->id());
      $terms_array[$x] = Term::load($term->id());
    }

    // Get Page 1.
    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');
    $this->assertText($term1->getName(), 'Parent Term is displayed on Page 1');
    for ($x = 1; $x <= 13; $x++) {
      $this->assertText($terms_array[$x]->getName(), $terms_array[$x]->getName() . ' found on Page 1');
    }

    // Get Page 2.
    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', ['query' => ['page' => 1]]);
    $this->assertText($term1->getName(), 'Parent Term is displayed on Page 2');
    for ($x = 1; $x <= 18; $x++) {
      $this->assertText($terms_array[$x]->getName(), $terms_array[$x]->getName() . ' found on Page 2');
    }

    // Get Page 3.
    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', ['query' => ['page' => 2]]);
    $this->assertNoText($term1->getName(), 'Parent Term is not displayed on Page 3');
    for ($x = 1; $x <= 17; $x++) {
      $this->assertNoText($terms_array[$x]->getName(), $terms_array[$x]->getName() . ' not found on Page 3');
    }
    for ($x = 18; $x <= 25; $x++) {
      $this->assertText($terms_array[$x]->getName(), $terms_array[$x]->getName() . ' found on Page 3');
    }
  }

  /**
   * Test that hook_node_$op implementations work correctly.
   *
   * Save & edit a node and assert that taxonomy terms are saved/loaded properly.
   */
  public function testTaxonomyNode() {
    // Create two taxonomy terms.
    $term1 = $this->createTerm($this->vocabulary);
    $term2 = $this->createTerm($this->vocabulary);

    // Post an article.
    $edit = [];
    $edit['title[0][value]'] = $this->randomMachineName();
    $edit['body[0][value]'] = $this->randomMachineName();
    $edit[$this->field->getName() . '[]'] = $term1->id();
    $this->drupalPostForm('node/add/article', $edit, t('Save'));

    // Check that the term is displayed when the node is viewed.
    $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
    $this->drupalGet('node/' . $node->id());
    $this->assertText($term1->getName(), 'Term is displayed when viewing the node.');

    $this->clickLink(t('Edit'));
    $this->assertText($term1->getName(), 'Term is displayed when editing the node.');
    $this->drupalPostForm(NULL, [], t('Save'));
    $this->assertText($term1->getName(), 'Term is displayed after saving the node with no changes.');

    // Edit the node with a different term.
    $edit[$this->field->getName() . '[]'] = $term2->id();
    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));

    $this->drupalGet('node/' . $node->id());
    $this->assertText($term2->getName(), 'Term is displayed when viewing the node.');

    // Preview the node.
    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Preview'));
    $this->assertUniqueText($term2->getName(), 'Term is displayed when previewing the node.');
    $this->drupalPostForm('node/' . $node->id() . '/edit', NULL, t('Preview'));
    $this->assertUniqueText($term2->getName(), 'Term is displayed when previewing the node again.');
  }

  /**
   * Test term creation with a free-tagging vocabulary from the node form.
   */
  public function testNodeTermCreationAndDeletion() {
    // Enable tags in the vocabulary.
    $field = $this->field;
    entity_get_form_display($field->getTargetEntityTypeId(), $field->getTargetBundle(), 'default')
      ->setComponent($field->getName(), [
        'type' => 'entity_reference_autocomplete_tags',
        'settings' => [
          'placeholder' => 'Start typing here.',
        ],
      ])
      ->save();
    // Prefix the terms with a letter to ensure there is no clash in the first
    // three letters.
    // @see https://www.drupal.org/node/2397691
    $terms = [
      'term1' => 'a' . $this->randomMachineName(),
      'term2' => 'b' . $this->randomMachineName(),
      'term3' => 'c' . $this->randomMachineName() . ', ' . $this->randomMachineName(),
      'term4' => 'd' . $this->randomMachineName(),
    ];

    $edit = [];
    $edit['title[0][value]'] = $this->randomMachineName();
    $edit['body[0][value]'] = $this->randomMachineName();
    // Insert the terms in a comma separated list. Vocabulary 1 is a
    // free-tagging field created by the default profile.
    $edit[$field->getName() . '[target_id]'] = Tags::implode($terms);

    // Verify the placeholder is there.
    $this->drupalGet('node/add/article');
    $this->assertRaw('placeholder="Start typing here."', 'Placeholder is present.');

    // Preview and verify the terms appear but are not created.
    $this->drupalPostForm(NULL, $edit, t('Preview'));
    foreach ($terms as $term) {
      $this->assertText($term, 'The term appears on the node preview.');
    }
    $tree = $this->container->get('entity.manager')->getStorage('taxonomy_term')->loadTree($this->vocabulary->id());
    $this->assertTrue(empty($tree), 'The terms are not created on preview.');

    // taxonomy.module does not maintain its static caches.
    taxonomy_terms_static_reset();

    // Save, creating the terms.
    $this->drupalPostForm('node/add/article', $edit, t('Save'));
    $this->assertText(t('@type @title has been created.', ['@type' => t('Article'), '@title' => $edit['title[0][value]']]), 'The node was created successfully.');

    // Verify that the creation message contains a link to a node.
    $view_link = $this->xpath('//div[@class="messages"]//a[contains(@href, :href)]', [':href' => 'node/']);
    $this->assert(isset($view_link), 'The message area contains a link to a node');

    foreach ($terms as $term) {
      $this->assertText($term, 'The term was saved and appears on the node page.');
    }

    // Get the created terms.
    $term_objects = [];
    foreach ($terms as $key => $term) {
      $term_objects[$key] = taxonomy_term_load_multiple_by_name($term);
      $term_objects[$key] = reset($term_objects[$key]);
    }

    // Get the node.
    $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);

    // Test editing the node.
    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
    foreach ($terms as $term) {
      $this->assertText($term, 'The term was retained after edit and still appears on the node page.');
    }

    // Delete term 1 from the term edit page.
    $this->drupalGet('taxonomy/term/' . $term_objects['term1']->id() . '/edit');
    $this->clickLink(t('Delete'));
    $this->drupalPostForm(NULL, NULL, t('Delete'));

    // Delete term 2 from the term delete page.
    $this->drupalGet('taxonomy/term/' . $term_objects['term2']->id() . '/delete');
    $this->drupalPostForm(NULL, [], t('Delete'));
    $term_names = [$term_objects['term3']->getName(), $term_objects['term4']->getName()];

    $this->drupalGet('node/' . $node->id());

    foreach ($term_names as $term_name) {
      $this->assertText($term_name, format_string('The term %name appears on the node page after two terms, %deleted1 and %deleted2, were deleted.', ['%name' => $term_name, '%deleted1' => $term_objects['term1']->getName(), '%deleted2' => $term_objects['term2']->getName()]));
    }
    $this->assertNoText($term_objects['term1']->getName(), format_string('The deleted term %name does not appear on the node page.', ['%name' => $term_objects['term1']->getName()]));
    $this->assertNoText($term_objects['term2']->getName(), format_string('The deleted term %name does not appear on the node page.', ['%name' => $term_objects['term2']->getName()]));
  }

  /**
   * Save, edit and delete a term using the user interface.
   */
  public function testTermInterface() {
    \Drupal::service('module_installer')->install(['views']);
    $edit = [
      'name[0][value]' => $this->randomMachineName(12),
      'description[0][value]' => $this->randomMachineName(100),
    ];
    // Explicitly set the parents field to 'root', to ensure that
    // TermForm::save() handles the invalid term ID correctly.
    $edit['parent[]'] = [0];

    // Create the term to edit.
    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add', $edit, t('Save'));

    $terms = taxonomy_term_load_multiple_by_name($edit['name[0][value]']);
    $term = reset($terms);
    $this->assertNotNull($term, 'Term found in database.');

    // Submitting a term takes us to the add page; we need the List page.
    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');

    $this->clickLink(t('Edit'));

    $this->assertRaw($edit['name[0][value]'], 'The randomly generated term name is present.');
    $this->assertText($edit['description[0][value]'], 'The randomly generated term description is present.');

    $edit = [
      'name[0][value]' => $this->randomMachineName(14),
      'description[0][value]' => $this->randomMachineName(102),
    ];

    // Edit the term.
    $this->drupalPostForm('taxonomy/term/' . $term->id() . '/edit', $edit, t('Save'));

    // Check that the term is still present at admin UI after edit.
    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');
    $this->assertText($edit['name[0][value]'], 'The randomly generated term name is present.');
    $this->assertLink(t('Edit'));

    // Check the term link can be clicked through to the term page.
    $this->clickLink($edit['name[0][value]']);
    $this->assertResponse(200, 'Term page can be accessed via the listing link.');

    // View the term and check that it is correct.
    $this->drupalGet('taxonomy/term/' . $term->id());
    $this->assertText($edit['name[0][value]'], 'The randomly generated term name is present.');
    $this->assertText($edit['description[0][value]'], 'The randomly generated term description is present.');

    // Did this page request display a 'term-listing-heading'?
    $this->assertTrue($this->xpath('//div[contains(@class, "field--name-description")]'), 'Term page displayed the term description element.');
    // Check that it does NOT show a description when description is blank.
    $term->setDescription(NULL);
    $term->save();
    $this->drupalGet('taxonomy/term/' . $term->id());
    $this->assertFalse($this->xpath('//div[contains(@class, "field--entity-taxonomy-term--description")]'), 'Term page did not display the term description when description was blank.');

    // Check that the description value is processed.
    $value = $this->randomMachineName();
    $term->setDescription($value);
    $term->save();
    $this->assertEqual($term->description->processed, "<p>$value</p>\n");

    // Check that the term feed page is working.
    $this->drupalGet('taxonomy/term/' . $term->id() . '/feed');

    // Delete the term.
    $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
    $this->clickLink(t('Delete'));
    $this->drupalPostForm(NULL, NULL, t('Delete'));

    // Assert that the term no longer exists.
    $this->drupalGet('taxonomy/term/' . $term->id());
    $this->assertResponse(404, 'The taxonomy term page was not found.');
  }

  /**
   * Save, edit and delete a term using the user interface.
   */
  public function testTermReorder() {
    $assert = $this->assertSession();
    $this->createTerm($this->vocabulary);
    $this->createTerm($this->vocabulary);
    $this->createTerm($this->vocabulary);

    $taxonomy_storage = $this->container->get('entity.manager')->getStorage('taxonomy_term');

    // Fetch the created terms in the default alphabetical order, i.e. term1
    // precedes term2 alphabetically, and term2 precedes term3.
    $taxonomy_storage->resetCache();
    list($term1, $term2, $term3) = $taxonomy_storage->loadTree($this->vocabulary->id(), 0, NULL, TRUE);

    $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');

    // Each term has four hidden fields, "tid:1:0[tid]", "tid:1:0[parent]",
    // "tid:1:0[depth]", and "tid:1:0[weight]". Change the order to term2,
    // term3, term1 by setting weight property, make term3 a child of term2 by
    // setting the parent and depth properties, and update all hidden fields.
    $hidden_edit = [
      'terms[tid:' . $term2->id() . ':0][term][tid]' => $term2->id(),
      'terms[tid:' . $term2->id() . ':0][term][parent]' => 0,
      'terms[tid:' . $term2->id() . ':0][term][depth]' => 0,
      'terms[tid:' . $term3->id() . ':0][term][tid]' => $term3->id(),
      'terms[tid:' . $term3->id() . ':0][term][parent]' => $term2->id(),
      'terms[tid:' . $term3->id() . ':0][term][depth]' => 1,
      'terms[tid:' . $term1->id() . ':0][term][tid]' => $term1->id(),
      'terms[tid:' . $term1->id() . ':0][term][parent]' => 0,
      'terms[tid:' . $term1->id() . ':0][term][depth]' => 0,
    ];
    // Because we can't post hidden form elements, we have to change them in
    // code here, and then submit.
    foreach ($hidden_edit as $field => $value) {
      $node = $assert->hiddenFieldExists($field);
      $node->setValue($value);
    }
    // Edit non-hidden elements within drupalPostForm().
    $edit = [
      'terms[tid:' . $term2->id() . ':0][weight]' => 0,
      'terms[tid:' . $term3->id() . ':0][weight]' => 1,
      'terms[tid:' . $term1->id() . ':0][weight]' => 2,
    ];
    $this->drupalPostForm(NULL, $edit, 'Save');

    $taxonomy_storage->resetCache();
    $terms = $taxonomy_storage->loadTree($this->vocabulary->id());
    $this->assertEqual($terms[0]->tid, $term2->id(), 'Term 2 was moved above term 1.');
    $this->assertEqual($terms[1]->parents, [$term2->id()], 'Term 3 was made a child of term 2.');
    $this->assertEqual($terms[2]->tid, $term1->id(), 'Term 1 was moved below term 2.');

    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview', [], t('Reset to alphabetical'));
    // Submit confirmation form.
    $this->drupalPostForm(NULL, [], t('Reset to alphabetical'));
    // Ensure form redirected back to overview.
    $this->assertUrl('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/overview');

    $taxonomy_storage->resetCache();
    $terms = $taxonomy_storage->loadTree($this->vocabulary->id(), 0, NULL, TRUE);
    $this->assertEqual($terms[0]->id(), $term1->id(), 'Term 1 was moved to back above term 2.');
    $this->assertEqual($terms[1]->id(), $term2->id(), 'Term 2 was moved to back below term 1.');
    $this->assertEqual($terms[2]->id(), $term3->id(), 'Term 3 is still below term 2.');
    $this->assertEqual($terms[2]->parents, [$term2->id()], 'Term 3 is still a child of term 2.');
  }

  /**
   * Test saving a term with multiple parents through the UI.
   */
  public function testTermMultipleParentsInterface() {
    // Add a new term to the vocabulary so that we can have multiple parents.
    $parent = $this->createTerm($this->vocabulary);

    // Add a new term with multiple parents.
    $edit = [
      'name[0][value]' => $this->randomMachineName(12),
      'description[0][value]' => $this->randomMachineName(100),
      'parent[]' => [0, $parent->id()],
    ];
    // Save the new term.
    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add', $edit, t('Save'));

    // Check that the term was successfully created.
    $terms = taxonomy_term_load_multiple_by_name($edit['name[0][value]']);
    $term = reset($terms);
    $this->assertNotNull($term, 'Term found in database.');
    $this->assertEqual($edit['name[0][value]'], $term->getName(), 'Term name was successfully saved.');
    $this->assertEqual($edit['description[0][value]'], $term->getDescription(), 'Term description was successfully saved.');
    // Check that the parent tid is still there. The other parent (<root>) is
    // not added by \Drupal\taxonomy\TermStorageInterface::loadParents().
    $parents = $this->container->get('entity.manager')->getStorage('taxonomy_term')->loadParents($term->id());
    $parent = reset($parents);
    $this->assertEqual($edit['parent[]'][1], $parent->id(), 'Term parents were successfully saved.');
  }

  /**
   * Test taxonomy_term_load_multiple_by_name().
   */
  public function testTaxonomyGetTermByName() {
    $term = $this->createTerm($this->vocabulary);

    // Load the term with the exact name.
    $terms = taxonomy_term_load_multiple_by_name($term->getName());
    $this->assertTrue(isset($terms[$term->id()]), 'Term loaded using exact name.');

    // Load the term with space concatenated.
    $terms = taxonomy_term_load_multiple_by_name('  ' . $term->getName() . '   ');
    $this->assertTrue(isset($terms[$term->id()]), 'Term loaded with extra whitespace.');

    // Load the term with name uppercased.
    $terms = taxonomy_term_load_multiple_by_name(strtoupper($term->getName()));
    $this->assertTrue(isset($terms[$term->id()]), 'Term loaded with uppercased name.');

    // Load the term with name lowercased.
    $terms = taxonomy_term_load_multiple_by_name(strtolower($term->getName()));
    $this->assertTrue(isset($terms[$term->id()]), 'Term loaded with lowercased name.');

    // Try to load an invalid term name.
    $terms = taxonomy_term_load_multiple_by_name('Banana');
    $this->assertFalse($terms, 'No term loaded with an invalid name.');

    // Try to load the term using a substring of the name.
    $terms = taxonomy_term_load_multiple_by_name(mb_substr($term->getName(), 2), 'No term loaded with a substring of the name.');
    $this->assertFalse($terms);

    // Create a new term in a different vocabulary with the same name.
    $new_vocabulary = $this->createVocabulary();
    $new_term = Term::create([
      'name' => $term->getName(),
      'vid' => $new_vocabulary->id(),
    ]);
    $new_term->save();

    // Load multiple terms with the same name.
    $terms = taxonomy_term_load_multiple_by_name($term->getName());
    $this->assertEqual(count($terms), 2, 'Two terms loaded with the same name.');

    // Load single term when restricted to one vocabulary.
    $terms = taxonomy_term_load_multiple_by_name($term->getName(), $this->vocabulary->id());
    $this->assertEqual(count($terms), 1, 'One term loaded when restricted by vocabulary.');
    $this->assertTrue(isset($terms[$term->id()]), 'Term loaded using exact name and vocabulary machine name.');

    // Create a new term with another name.
    $term2 = $this->createTerm($this->vocabulary);

    // Try to load a term by name that doesn't exist in this vocabulary but
    // exists in another vocabulary.
    $terms = taxonomy_term_load_multiple_by_name($term2->getName(), $new_vocabulary->id());
    $this->assertFalse($terms, 'Invalid term name restricted by vocabulary machine name not loaded.');

    // Try to load terms filtering by a non-existing vocabulary.
    $terms = taxonomy_term_load_multiple_by_name($term2->getName(), 'non_existing_vocabulary');
    $this->assertEqual(count($terms), 0, 'No terms loaded when restricted by a non-existing vocabulary.');
  }

  /**
   * Tests that editing and saving a node with no changes works correctly.
   */
  public function testReSavingTags() {
    // Enable tags in the vocabulary.
    $field = $this->field;
    entity_get_form_display($field->getTargetEntityTypeId(), $field->getTargetBundle(), 'default')
      ->setComponent($field->getName(), [
        'type' => 'entity_reference_autocomplete_tags',
      ])
      ->save();

    // Create a term and a node using it.
    $term = $this->createTerm($this->vocabulary);
    $edit = [];
    $edit['title[0][value]'] = $this->randomMachineName(8);
    $edit['body[0][value]'] = $this->randomMachineName(16);
    $edit[$this->field->getName() . '[target_id]'] = $term->getName();
    $this->drupalPostForm('node/add/article', $edit, t('Save'));

    // Check that the term is displayed when editing and saving the node with no
    // changes.
    $this->clickLink(t('Edit'));
    $this->assertRaw($term->getName(), 'Term is displayed when editing the node.');
    $this->drupalPostForm(NULL, [], t('Save'));
    $this->assertRaw($term->getName(), 'Term is displayed after saving the node with no changes.');
  }

  /**
   * Check the breadcrumb on edit and delete a term page.
   */
  public function testTermBreadcrumbs() {
    $edit = [
      'name[0][value]' => $this->randomMachineName(14),
      'description[0][value]' => $this->randomMachineName(100),
      'parent[]' => [0],
    ];

    // Create the term.
    $this->drupalPostForm('admin/structure/taxonomy/manage/' . $this->vocabulary->id() . '/add', $edit, 'Save');

    $terms = taxonomy_term_load_multiple_by_name($edit['name[0][value]']);
    $term = reset($terms);
    $this->assertNotNull($term, 'Term found in database.');

    // Check the breadcrumb on the term edit page.
    $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
    $breadcrumbs = $this->getSession()->getPage()->findAll('css', 'nav.breadcrumb ol li a');
    $this->assertIdentical(count($breadcrumbs), 2, 'The breadcrumbs are present on the page.');
    $this->assertIdentical($breadcrumbs[0]->getText(), 'Home', 'First breadcrumb text is Home');
    $this->assertIdentical($breadcrumbs[1]->getText(), $term->label(), 'Second breadcrumb text is term name on term edit page.');
    $this->assertEscaped($breadcrumbs[1]->getText(), 'breadcrumbs displayed and escaped.');

    // Check the breadcrumb on the term delete page.
    $this->drupalGet('taxonomy/term/' . $term->id() . '/delete');
    $breadcrumbs = $this->getSession()->getPage()->findAll('css', 'nav.breadcrumb ol li a');
    $this->assertIdentical(count($breadcrumbs), 2, 'The breadcrumbs are present on the page.');
    $this->assertIdentical($breadcrumbs[0]->getText(), 'Home', 'First breadcrumb text is Home');
    $this->assertIdentical($breadcrumbs[1]->getText(), $term->label(), 'Second breadcrumb text is term name on term delete page.');
    $this->assertEscaped($breadcrumbs[1]->getText(), 'breadcrumbs displayed and escaped.');
  }

}