TermTest.php

<?php

declare (strict_types=1);
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\TermInterface;
use Drupal\Tests\system\Functional\Menu\AssertBreadcrumbTrait;

/**
 * Tests load, save and delete for taxonomy terms.
 *
 * @group taxonomy
 * @group #slow
 */
class TermTest extends TaxonomyTestBase {
    use AssertBreadcrumbTrait;
    
    /**
     * 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[]
     */
    protected static $modules = [
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalPlaceBlock('local_actions_block');
        $this->drupalPlaceBlock('local_tasks_block');
        $this->drupalPlaceBlock('page_title_block');
        $this->drupalLogin($this->drupalCreateUser([
            'administer taxonomy',
            'access taxonomy overview',
            '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);
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        $display_repository->getFormDisplay('node', 'article')
            ->setComponent($field_name, [
            'type' => 'options_select',
        ])
            ->save();
        $display_repository->getViewDisplay('node', 'article')
            ->setComponent($field_name, [
            'type' => 'entity_reference_label',
        ])
            ->save();
    }
    
    /**
     * The "parent" field must restrict references to the same vocabulary.
     */
    public function testParentHandlerSettings() : void {
        $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->assertSame([
            $this->vocabulary
                ->id() => $this->vocabulary
                ->id(),
        ], $parent_target_bundles);
    }
    
    /**
     * Tests terms in a single and multiple hierarchy.
     */
    public function testTaxonomyTermHierarchy() : void {
        // 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->drupalGet('taxonomy/term/' . $term2->id() . '/edit');
        $this->submitForm($edit, '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());
        $this->assertArrayHasKey($term1->id(), $parents);
        $this->assertArrayHasKey($term3->id(), $parents);
    }
    
    /**
     * Tests that many terms with parents show on each page.
     */
    public function testTaxonomyTermChildTerms() : void {
        // 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_type.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. Parent term and terms 1-13 are displayed.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->assertSession()
            ->pageTextContains($term1->getName());
        for ($x = 1; $x <= 13; $x++) {
            $this->assertSession()
                ->pageTextContains($terms_array[$x]->getName());
        }
        // Get Page 2. Parent term and terms 1-18 are displayed.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview', [
            'query' => [
                'page' => 1,
            ],
        ]);
        $this->assertSession()
            ->pageTextContains($term1->getName());
        for ($x = 1; $x <= 18; $x++) {
            $this->assertSession()
                ->pageTextContains($terms_array[$x]->getName());
        }
        // Get Page 3. No parent term and no terms <18 are displayed. Terms 18-25
        // are displayed.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview', [
            'query' => [
                'page' => 2,
            ],
        ]);
        $this->assertSession()
            ->pageTextNotContains($term1->getName());
        for ($x = 1; $x <= 17; $x++) {
            $this->assertSession()
                ->pageTextNotContains($terms_array[$x]->getName());
        }
        for ($x = 18; $x <= 25; $x++) {
            $this->assertSession()
                ->pageTextContains($terms_array[$x]->getName());
        }
    }
    
    /**
     * Tests term creation with a free-tagging vocabulary from the node form.
     */
    public function testNodeTermCreationAndDeletion() : void {
        // Enable tags in the vocabulary.
        $field = $this->field;
        \Drupal::service('entity_display.repository')->getFormDisplay($field->getTargetEntityTypeId(), $field->getTargetBundle())
            ->setComponent($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->assertSession()
            ->responseContains('placeholder="Start typing here."');
        // Preview and verify the terms appear but are not created.
        $this->submitForm($edit, 'Preview');
        foreach ($terms as $term) {
            $this->assertSession()
                ->pageTextContains($term);
        }
        $tree = $this->container
            ->get('entity_type.manager')
            ->getStorage('taxonomy_term')
            ->loadTree($this->vocabulary
            ->id());
        $this->assertEmpty($tree, 'The terms are not created on preview.');
        // Save, creating the terms.
        $this->drupalGet('node/add/article');
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('Article ' . $edit['title[0][value]'] . ' has been created.');
        // Verify that the creation message contains a link to a node.
        $this->assertSession()
            ->elementExists('xpath', '//div[@data-drupal-messages]//a[contains(@href, "node/")]');
        foreach ($terms as $term) {
            $this->assertSession()
                ->pageTextContains($term);
        }
        // Get the created terms.
        $term_objects = [];
        foreach ($terms as $key => $term) {
            $term_objects[$key] = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
                ->loadByProperties([
                'name' => $term,
            ]);
            $term_objects[$key] = reset($term_objects[$key]);
        }
        // Get the node.
        $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
        // Test editing the node.
        $this->drupalGet('node/' . $node->id() . '/edit');
        $this->submitForm($edit, 'Save');
        foreach ($terms as $term) {
            $this->assertSession()
                ->pageTextContains($term);
        }
        // Delete term 1 from the term edit page.
        $this->drupalGet('taxonomy/term/' . $term_objects['term1']->id() . '/edit');
        $this->clickLink('Delete');
        $this->submitForm([], 'Delete');
        // Delete term 2 from the term delete page.
        $this->drupalGet('taxonomy/term/' . $term_objects['term2']->id() . '/delete');
        $this->submitForm([], 'Delete');
        // Verify that the terms appear on the node page after the two terms were
        // deleted.
        $term_names = [
            $term_objects['term3']->getName(),
            $term_objects['term4']->getName(),
        ];
        $this->drupalGet('node/' . $node->id());
        foreach ($term_names as $term_name) {
            $this->assertSession()
                ->pageTextContains($term_name);
        }
        $this->assertSession()
            ->pageTextNotContains($term_objects['term1']->getName());
        $this->assertSession()
            ->pageTextNotContains($term_objects['term2']->getName());
    }
    
    /**
     * Save, edit and delete a term using the user interface.
     */
    public function testTermInterface() : void {
        \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->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $this->submitForm($edit, 'Save');
        // Ensure form redirected back to term add page.
        $this->assertSession()
            ->addressEquals('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->loadByProperties([
            '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('Edit', 1);
        // Verify that the randomly generated term is present.
        $this->assertSession()
            ->pageTextContains($edit['name[0][value]']);
        $this->assertSession()
            ->pageTextContains($edit['description[0][value]']);
        // Test the "Add child" link on the overview page.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->assertSession()
            ->linkExistsExact('Add child');
        $this->clickLink('Add child');
        $edit = [
            'name[0][value]' => 'Child term',
        ];
        $this->submitForm($edit, 'Save');
        $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->loadByProperties([
            'name' => 'Child term',
        ]);
        $child = reset($terms);
        $this->assertNotNull($child, 'Child term found in database.');
        $this->assertEquals($term->id(), $child->get('parent')
            ->getValue()[0]['target_id']);
        // Edit the term.
        $edit = [
            'name[0][value]' => $this->randomMachineName(14),
            'description[0][value]' => $this->randomMachineName(102),
        ];
        $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
        $this->submitForm($edit, 'Save');
        // Ensure form redirected back to term view.
        $this->assertSession()
            ->addressEquals('taxonomy/term/' . $term->id());
        // Check that the term is still present at admin UI after edit.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->assertSession()
            ->pageTextContains($edit['name[0][value]']);
        $this->assertSession()
            ->linkExists('Edit');
        // Unpublish the term.
        $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
        $this->submitForm([
            "status[value]" => 0,
        ], 'Save');
        // Check that the term is now unpublished in the list.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->assertSession()
            ->elementTextContains('css', "#edit-terms-tid{$term->id()}0-status", 'Unpublished');
        // Check the term link can be clicked through to the term page.
        $this->clickLink($edit['name[0][value]']);
        $this->assertSession()
            ->statusCodeEquals(200);
        // View the term and check that it is correct.
        $this->drupalGet('taxonomy/term/' . $term->id());
        $this->assertSession()
            ->pageTextContains($edit['name[0][value]']);
        $this->assertSession()
            ->pageTextContains($edit['description[0][value]']);
        // Did this page request display a 'term-listing-heading'?
        $this->assertSession()
            ->elementExists('xpath', '//div[@class="views-element-container"]/div/header/div/div/p');
        // Check that it does NOT show a description when description is blank.
        $term->setDescription(NULL);
        $term->save();
        $this->drupalGet('taxonomy/term/' . $term->id());
        $this->assertSession()
            ->elementNotExists('xpath', '//div[@class="views-element-container"]/div/header/div/div/p');
        // Check that the description value is processed.
        $value = $this->randomMachineName();
        $term->setDescription($value);
        $term->save();
        $this->assertSame("<p>{$value}</p>\n", (string) $term->description->processed);
        // 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('Delete');
        $this->submitForm([], 'Delete');
        // Assert that the term no longer exists.
        $this->drupalGet('taxonomy/term/' . $term->id());
        $this->assertSession()
            ->statusCodeEquals(404);
        // Test "save and go to list" action while creating term.
        // Create the term to edit.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $edit = [
            'name[0][value]' => $this->randomMachineName(12),
            'description[0][value]' => $this->randomMachineName(100),
        ];
        // Create the term to edit.
        $this->submitForm($edit, 'Save and go to list');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->addressEquals('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->assertSession()
            ->pageTextContains($edit['name[0][value]']);
        // Validate that "Save and go to list" doesn't exist when destination
        // parameter is present.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add', [
            'query' => [
                'destination' => 'node/add',
            ],
        ]);
        $this->assertSession()
            ->pageTextNotContains('Save and go to list');
        // Validate that "Save and go to list" doesn't exist when missing permission
        // 'access taxonomy overview'.
        $this->drupalLogin($this->drupalCreateUser([
            'administer taxonomy',
            'bypass node access',
        ]));
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $this->assertSession()
            ->pageTextNotContains('Save and go to list');
    }
    
    /**
     * Test UI with override_selector TRUE.
     */
    public function testTermSaveOverrideSelector() : void {
        $this->config('taxonomy.settings')
            ->set('override_selector', TRUE)
            ->save();
        // Create a Term.
        $edit = [
            'name[0][value]' => $this->randomMachineName(12),
            'description[0][value]' => $this->randomMachineName(100),
        ];
        // Create the term to edit.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $this->submitForm($edit, 'Save');
        $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->loadByProperties([
            'name' => $edit['name[0][value]'],
        ]);
        $term = reset($terms);
        $this->assertNotNull($term, 'Term found in database.');
        // The term appears on the vocab list page.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->assertSession()
            ->pageTextContains($term->getName());
    }
    
    /**
     * Save, edit and delete a term using the user interface.
     */
    public function testTermReorder() : void {
        $assert = $this->assertSession();
        $this->createTerm($this->vocabulary);
        $this->createTerm($this->vocabulary);
        $this->createTerm($this->vocabulary);
        $taxonomy_storage = $this->container
            ->get('entity_type.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();
        [
            $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 submitForm().
        $edit = [
            'terms[tid:' . $term2->id() . ':0][weight]' => 0,
            'terms[tid:' . $term3->id() . ':0][weight]' => 1,
            'terms[tid:' . $term1->id() . ':0][weight]' => 2,
        ];
        $this->submitForm($edit, 'Save');
        $taxonomy_storage->resetCache();
        $terms = $taxonomy_storage->loadTree($this->vocabulary
            ->id());
        $this->assertEquals($term2->id(), $terms[0]->tid, 'Term 2 was moved above term 1.');
        $this->assertEquals([
            $term2->id(),
        ], $terms[1]->parents, 'Term 3 was made a child of term 2.');
        $this->assertEquals($term1->id(), $terms[2]->tid, 'Term 1 was moved below term 2.');
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $this->submitForm([], 'Reset to alphabetical');
        // Submit confirmation form.
        $this->submitForm([], 'Reset to alphabetical');
        // Ensure form redirected back to overview.
        $this->assertSession()
            ->addressEquals('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/overview');
        $taxonomy_storage->resetCache();
        $terms = $taxonomy_storage->loadTree($this->vocabulary
            ->id(), 0, NULL, TRUE);
        $this->assertEquals($term1->id(), $terms[0]->id(), 'Term 1 was moved to back above term 2.');
        $this->assertEquals($term2->id(), $terms[1]->id(), 'Term 2 was moved to back below term 1.');
        $this->assertEquals($term3->id(), $terms[2]->id(), 'Term 3 is still below term 2.');
        $this->assertEquals([
            $term2->id(),
        ], $terms[2]->parents, 'Term 3 is still a child of term 2.');
    }
    
    /**
     * Tests saving a term with multiple parents through the UI.
     */
    public function testTermMultipleParentsInterface() : void {
        // Add two new terms to the vocabulary so that we can have multiple parents.
        // These will be terms with tids of 1 and 2 respectively.
        $this->createTerm($this->vocabulary);
        $this->createTerm($this->vocabulary);
        // Add a new term with multiple parents.
        $edit = [
            'name[0][value]' => $this->randomMachineName(12),
            'description[0][value]' => $this->randomMachineName(100),
            'parent[]' => [
                0,
                1,
            ],
        ];
        // Save the new term.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $this->submitForm($edit, 'Save');
        // Check that the term was successfully created.
        $term = $this->reloadTermByName($edit['name[0][value]']);
        $this->assertNotNull($term, 'Term found in database.');
        $this->assertEquals($edit['name[0][value]'], $term->getName(), 'Term name was successfully saved.');
        $this->assertEquals($edit['description[0][value]'], $term->getDescription(), 'Term description was successfully saved.');
        // Check that we have the expected parents.
        $this->assertEquals([
            0,
            1,
        ], $this->getParentTids($term), 'Term parents (root plus one) were successfully saved.');
        // Load the edit form and save again to ensure parent are preserved.
        // Generate a new name, so we know that the term really is saved.
        $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
        $edit = [
            'name[0][value]' => $this->randomMachineName(12),
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('Updated term ' . $edit['name[0][value]']);
        $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
        $this->submitForm([], 'Save');
        $this->assertSession()
            ->pageTextContains('Updated term ' . $edit['name[0][value]']);
        // Check that we still have the expected parents.
        $term = $this->reloadTermByName($edit['name[0][value]']);
        $this->assertEquals([
            0,
            1,
        ], $this->getParentTids($term), 'Term parents (root plus one) were successfully saved again.');
        // Save with two real parents. i.e., not including <root>.
        $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
        $edit = [
            'name[0][value]' => $this->randomMachineName(12),
            'parent[]' => [
                1,
                2,
            ],
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('Updated term ' . $edit['name[0][value]']);
        $this->drupalGet('taxonomy/term/' . $term->id() . '/edit');
        $this->submitForm([], 'Save');
        $this->assertSession()
            ->pageTextContains('Updated term ' . $edit['name[0][value]']);
        // Check that we have the expected parents.
        $term = $this->reloadTermByName($edit['name[0][value]']);
        $this->assertEquals([
            1,
            2,
        ], $this->getParentTids($term), 'Term parents (two real) were successfully saved.');
    }
    
    /**
     * Reloads a term by name.
     *
     * @param string $name
     *   The name of the term.
     *
     * @return \Drupal\taxonomy\TermInterface
     *   The reloaded term.
     */
    private function reloadTermByName(string $name) : TermInterface {
        \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->resetCache();
        
        /** @var \Drupal\taxonomy\TermInterface[] $terms */
        $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->loadByProperties([
            'name' => $name,
        ]);
        return reset($terms);
    }
    
    /**
     * Get the parent tids for a term including root.
     *
     * @param \Drupal\taxonomy\TermInterface $term
     *   The term.
     *
     * @return array
     *   A sorted array of tids and 0 if the root is a parent.
     */
    private function getParentTids($term) {
        $parent_tids = [];
        foreach ($term->get('parent') as $item) {
            $parent_tids[] = (int) $item->target_id;
        }
        sort($parent_tids);
        return $parent_tids;
    }
    
    /**
     * Tests that editing and saving a node with no changes works correctly.
     */
    public function testReSavingTags() : void {
        // Enable tags in the vocabulary.
        $field = $this->field;
        \Drupal::service('entity_display.repository')->getFormDisplay($field->getTargetEntityTypeId(), $field->getTargetBundle())
            ->setComponent($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->drupalGet('node/add/article');
        $this->submitForm($edit, 'Save');
        // Check that the term is displayed when editing and saving the node with no
        // changes.
        $this->clickLink('Edit');
        $this->assertSession()
            ->responseContains($term->getName());
        $this->submitForm([], 'Save');
        $this->assertSession()
            ->responseContains($term->getName());
    }
    
    /**
     * Check the breadcrumb on edit and delete a term page.
     */
    public function testTermBreadcrumbs() : void {
        $edit = [
            'name[0][value]' => $this->randomMachineName(14),
            'description[0][value]' => $this->randomMachineName(100),
            'parent[]' => [
                0,
            ],
        ];
        // Create the term.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary
            ->id() . '/add');
        $this->submitForm($edit, 'Save');
        $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->loadByProperties([
            'name' => $edit['name[0][value]'],
        ]);
        $term = reset($terms);
        $this->assertNotNull($term, 'Term found in database.');
        // Check the breadcrumb on the term edit page.
        $trail = [
            '' => 'Home',
            'taxonomy/term/' . $term->id() => $term->label(),
        ];
        $this->assertBreadcrumb('taxonomy/term/' . $term->id() . '/edit', $trail);
        $this->assertSession()
            ->assertEscaped($term->label());
        // Check the breadcrumb on the term delete page.
        $trail = [
            '' => 'Home',
            'taxonomy/term/' . $term->id() => $term->label(),
        ];
        $this->assertBreadcrumb('taxonomy/term/' . $term->id() . '/delete', $trail);
        $this->assertSession()
            ->assertEscaped($term->label());
    }

}