class EntityExistsTest

class EntityExistsTest extends KernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'migrate',
    'system',
    'user',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installSchema('system', [
      'sequences',
    ]);
    $this->installEntitySchema('user');
  }
  
  /**
   * Tests the EntityExists plugin.
   */
  public function testEntityExists() {
    $user = User::create([
      'name' => $this->randomString(),
    ]);
    $user->save();
    $uid = $user->id();
    $plugin = \Drupal::service('plugin.manager.migrate.process')->createInstance('entity_exists', [
      'entity_type' => 'user',
    ]);
    $executable = $this->prophesize(MigrateExecutableInterface::class)
      ->reveal();
    $row = new Row();
    // Ensure that the entity ID is returned if it really exists.
    $value = $plugin->transform($uid, $executable, $row, 'buffalo');
    $this->assertSame($uid, $value);
    // Ensure that the plugin returns FALSE if the entity doesn't exist.
    $value = $plugin->transform(420, $executable, $row, 'buffalo');
    $this->assertFalse($value);
    // Make sure the plugin can gracefully handle an array as input.
    $value = $plugin->transform([
      $uid,
      420,
    ], $executable, $row, 'buffalo');
    $this->assertSame($uid, $value);
  }

}