class EntityDuplicateTest

class EntityDuplicateTest extends EntityKernelTestBase {
  
  /**
   * @var \Drupal\Core\Entity\ContentEntityStorageInterface
   */
  protected $entityTestRevStorage;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installEntitySchema('entity_test_rev');
    $this->entityTestRevStorage = $this->container
      ->get('entity_type.manager')
      ->getStorage('entity_test_rev');
  }
  
  /**
   * Tests duplicating a non-default revision.
   */
  public function testDuplicateNonDefaultRevision() {
    $entity = EntityTestRev::create([
      'name' => 'First Revision',
    ]);
    $entity->save();
    $first_revision_id = $entity->getRevisionId();
    $entity->setNewRevision(TRUE);
    $entity->name = 'Second Revision';
    $entity->save();
    $duplicate_first_revision = $this->entityTestRevStorage
      ->loadRevision($first_revision_id)
      ->createDuplicate();
    $this->assertTrue($duplicate_first_revision->isDefaultRevision(), 'Duplicating a non-default revision creates a default revision.');
    $this->assertEquals('First Revision', $duplicate_first_revision->label());
    $duplicate_first_revision->save();
    $duplicate_first_revision->name = 'Updated name';
    $duplicate_first_revision->save();
    $this->entityTestRevStorage
      ->resetCache();
    $duplicate_first_revision = EntityTestRev::load($duplicate_first_revision->id());
    $this->assertEquals('Updated name', $duplicate_first_revision->label());
  }

}