--- /dev/null
+<?php
+
+namespace Drupal\Tests\comment\Kernel;
+
+use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
+use Drupal\comment\Tests\CommentTestTrait;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\Tests\field\Kernel\FieldKernelTestBase;
+
+/**
+ * Tests the new entity API for the comment field type.
+ *
+ * @group comment
+ */
+class CommentItemTest extends FieldKernelTestBase {
+
+ use CommentTestTrait;
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['comment', 'entity_test', 'user'];
+
+ protected function setUp() {
+ parent::setUp();
+ $this->installSchema('comment', ['comment_entity_statistics']);
+ $this->installConfig(['comment']);
+ }
+
+ /**
+ * Tests using entity fields of the comment field type.
+ */
+ public function testCommentItem() {
+ $this->addDefaultCommentField('entity_test', 'entity_test', 'comment');
+
+ // Verify entity creation.
+ $entity = EntityTest::create();
+ $entity->name->value = $this->randomMachineName();
+ $entity->save();
+
+ // Verify entity has been created properly.
+ $id = $entity->id();
+ $storage = $this->container->get('entity_type.manager')->getStorage('entity_test');
+ $storage->resetCache([$id]);
+ $entity = $storage->load($id);
+ $this->assertTrue($entity->comment instanceof FieldItemListInterface, 'Field implements interface.');
+ $this->assertTrue($entity->comment[0] instanceof CommentItemInterface, 'Field item implements interface.');
+
+ // Test sample item generation.
+ /** @var \Drupal\entity_test\Entity\EntityTest $entity */
+ $entity = EntityTest::create();
+ $entity->comment->generateSampleItems();
+ $this->entityValidateAndSave($entity);
+ $this->assertTrue(in_array($entity->get('comment')->status, [
+ CommentItemInterface::HIDDEN,
+ CommentItemInterface::CLOSED,
+ CommentItemInterface::OPEN,
+ ]), 'Comment status value in defined range');
+
+ $mainProperty = $entity->comment[0]->mainPropertyName();
+ $this->assertEqual('status', $mainProperty);
+ }
+
+}