class TermKernelTest

class TermKernelTest extends KernelTestBase {
    use TaxonomyTestTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'filter',
        'taxonomy',
        'text',
        'user',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installConfig([
            'filter',
        ]);
        $this->installEntitySchema('taxonomy_term');
    }
    
    /**
     * Tests that a deleted term is no longer in the vocabulary.
     */
    public function testTermDelete() {
        $vocabulary = $this->createVocabulary();
        $valid_term = $this->createTerm($vocabulary);
        // Delete a valid term.
        $valid_term->delete();
        $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
            ->loadByProperties([
            'vid' => $vocabulary->id(),
        ]);
        $this->assertEmpty($terms, 'Vocabulary is empty after deletion');
    }
    
    /**
     * Deleting a parent of a term with multiple parents does not delete the term.
     */
    public function testMultipleParentDelete() {
        $vocabulary = $this->createVocabulary();
        $parent_term1 = $this->createTerm($vocabulary);
        $parent_term2 = $this->createTerm($vocabulary);
        $child_term = $this->createTerm($vocabulary);
        $child_term->parent = [
            $parent_term1->id(),
            $parent_term2->id(),
        ];
        $child_term->save();
        $child_term_id = $child_term->id();
        $parent_term1->delete();
        $term_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('taxonomy_term');
        $term_storage->resetCache([
            $child_term_id,
        ]);
        $child_term = Term::load($child_term_id);
        $this->assertNotEmpty($child_term, 'Child term is not deleted if only one of its parents is removed.');
        $parent_term2->delete();
        $term_storage->resetCache([
            $child_term_id,
        ]);
        $child_term = Term::load($child_term_id);
        $this->assertEmpty($child_term, 'Child term is deleted if all of its parents are removed.');
    }
    
    /**
     * Tests a taxonomy with terms that have multiple parents of different depths.
     */
    public function testTaxonomyVocabularyTree() {
        // Create a new vocabulary with 6 terms.
        $vocabulary = $this->createVocabulary();
        $term = [];
        for ($i = 0; $i < 6; $i++) {
            $term[$i] = $this->createTerm($vocabulary);
        }
        // Get the taxonomy storage.
        $taxonomy_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('taxonomy_term');
        // Set the weight on $term[1] so it appears before $term[5] when fetching
        // the parents for $term[2], in order to test for a regression on
        // \Drupal\taxonomy\TermStorageInterface::loadAllParents().
        $term[1]->weight = -1;
        $term[1]->save();
        // $term[2] is a child of 1 and 5.
        $term[2]->parent = [
            $term[1]->id(),
            $term[5]->id(),
        ];
        $term[2]->save();
        // $term[3] is a child of 2.
        $term[3]->parent = [
            $term[2]->id(),
        ];
        $term[3]->save();
        // $term[5] is a child of 4.
        $term[5]->parent = [
            $term[4]->id(),
        ];
        $term[5]->save();
        
        /**
         * Expected tree:
         * term[0] | depth: 0
         * term[1] | depth: 0
         * -- term[2] | depth: 1
         * ---- term[3] | depth: 2
         * term[4] | depth: 0
         * -- term[5] | depth: 1
         * ---- term[2] | depth: 2
         * ------ term[3] | depth: 3
         */
        // Count $term[1] parents with $max_depth = 1.
        $tree = $taxonomy_storage->loadTree($vocabulary->id(), $term[1]->id(), 1);
        $this->assertCount(1, $tree, 'We have one parent with depth 1.');
        // Count all vocabulary tree elements.
        $tree = $taxonomy_storage->loadTree($vocabulary->id());
        $this->assertCount(8, $tree, 'We have all vocabulary tree elements.');
        // Count elements in every tree depth.
        foreach ($tree as $element) {
            if (!isset($depth_count[$element->depth])) {
                $depth_count[$element->depth] = 0;
            }
            $depth_count[$element->depth]++;
        }
        $this->assertEquals(3, $depth_count[0], 'Three elements in taxonomy tree depth 0.');
        $this->assertEquals(2, $depth_count[1], 'Two elements in taxonomy tree depth 1.');
        $this->assertEquals(2, $depth_count[2], 'Two elements in taxonomy tree depth 2.');
        $this->assertEquals(1, $depth_count[3], 'One element in taxonomy tree depth 3.');
        
        /** @var \Drupal\taxonomy\TermStorageInterface $storage */
        $storage = \Drupal::entityTypeManager()->getStorage('taxonomy_term');
        // Count parents of $term[2].
        $parents = $storage->loadParents($term[2]->id());
        $this->assertCount(2, $parents, 'The term has two parents.');
        // Count parents of $term[3].
        $parents = $storage->loadParents($term[3]->id());
        $this->assertCount(1, $parents, 'The term has one parent.');
        // Identify all ancestors of $term[2].
        $ancestors = $storage->loadAllParents($term[2]->id());
        $this->assertCount(4, $ancestors, 'The term has four ancestors including the term itself.');
        // Identify all ancestors of $term[3].
        $ancestors = $storage->loadAllParents($term[3]->id());
        $this->assertCount(5, $ancestors, 'The term has five ancestors including the term itself.');
    }
    
    /**
     * Tests that a Term is renderable when unsaved (preview).
     */
    public function testTermPreview() {
        $entity_manager = \Drupal::entityTypeManager();
        $vocabulary = $this->createVocabulary();
        // Create a unsaved term.
        $term = $entity_manager->getStorage('taxonomy_term')
            ->create([
            'vid' => $vocabulary->id(),
            'name' => 'Foo',
        ]);
        // Confirm we can get the view of unsaved term.
        $render_array = $entity_manager->getViewBuilder('taxonomy_term')
            ->view($term);
        $this->assertNotEmpty($render_array, 'Term view builder is built.');
        // Confirm we can render said view.
        $rendered = \Drupal::service('renderer')->renderPlain($render_array);
        $this->assertNotEmpty(trim($rendered), 'Term is able to be rendered.');
    }

}