--- /dev/null
+<?php
+
+namespace Drupal\Tests\taxonomy\Functional\Update;
+
+use Drupal\FunctionalTests\Update\UpdatePathTestBase;
+use Drupal\taxonomy\Entity\Term;
+
+/**
+ * Ensure that the taxonomy updates are running as expected.
+ *
+ * @group taxonomy
+ * @group Update
+ * @group legacy
+ */
+class TaxonomyParentUpdateTest extends UpdatePathTestBase {
+
+ /**
+ * The database connection.
+ *
+ * @var \Drupal\Core\Database\Connection
+ */
+ protected $db;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+ $this->db = $this->container->get('database');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function setDatabaseDumpFiles() {
+ $this->databaseDumpFiles = [
+ __DIR__ . '/../../../../../system/tests/fixtures/update/drupal-8-rc1.bare.standard.php.gz',
+ __DIR__ . '/../../../../../system/tests/fixtures/update/drupal-8.views-taxonomy-parent-2543726.php',
+ ];
+ }
+
+ /**
+ * Tests taxonomy term parents update.
+ *
+ * @see taxonomy_update_8501()
+ * @see taxonomy_update_8502()
+ * @see taxonomy_update_8503()
+ */
+ public function testTaxonomyUpdateParents() {
+ // Force the update hook to only run one term per batch.
+ drupal_rewrite_settings([
+ 'settings' => [
+ 'entity_update_batch_size' => (object) [
+ 'value' => 1,
+ 'required' => TRUE,
+ ],
+ ],
+ ]);
+
+ // Run updates.
+ $this->runUpdates();
+
+ /** @var \Drupal\taxonomy\TermInterface $term */
+ $term = Term::load(1);
+ $parents = [2, 3];
+ $this->assertCount(2, $term->parent);
+ $this->assertTrue(in_array($term->parent[0]->entity->id(), $parents));
+ $this->assertTrue(in_array($term->parent[1]->entity->id(), $parents));
+
+ $term = Term::load(2);
+ $parents = [0, 3];
+ $this->assertCount(2, $term->parent);
+ $this->assertTrue(in_array($term->parent[0]->target_id, $parents));
+ $this->assertTrue(in_array($term->parent[1]->target_id, $parents));
+
+ $term = Term::load(3);
+ $this->assertCount(1, $term->parent);
+ // Target ID is returned as string.
+ $this->assertSame(0, (int) $term->get('parent')[0]->target_id);
+
+ // Test if the view has been converted to use the {taxonomy_term__parent}
+ // table instead of the {taxonomy_term_hierarchy} table.
+ $view = $this->config("views.view.test_taxonomy_parent");
+
+ $relationship_base_path = 'display.default.display_options.relationships.parent';
+ $this->assertSame('taxonomy_term__parent', $view->get("$relationship_base_path.table"));
+ $this->assertSame('parent_target_id', $view->get("$relationship_base_path.field"));
+
+ $filters_base_path_1 = 'display.default.display_options.filters.parent';
+ $this->assertSame('taxonomy_term__parent', $view->get("$filters_base_path_1.table"));
+ $this->assertSame('parent_target_id', $view->get("$filters_base_path_1.field"));
+
+ $filters_base_path_2 = 'display.default.display_options.filters.parent';
+ $this->assertSame('taxonomy_term__parent', $view->get("$filters_base_path_2.table"));
+ $this->assertSame('parent_target_id', $view->get("$filters_base_path_2.field"));
+
+ // The {taxonomy_term_hierarchy} table has been removed.
+ $this->assertFalse($this->db->schema()->tableExists('taxonomy_term_hierarchy'));
+ }
+
+}