class SerializerTest

class SerializerTest extends UnitTestCase {
  
  /**
   * The View instance.
   *
   * @var \Drupal\views\ViewExecutable|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $view;
  
  /**
   * The RestExport display handler.
   *
   * @var \Drupal\rest\Plugin\views\display\RestExport|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $displayHandler;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->view = $this->getMockBuilder(ViewExecutable::class)
      ->disableOriginalConstructor()
      ->getMock();
    // Make the view result empty so we don't have to mock the row plugin render
    // call.
    $this->view->result = [];
    $this->displayHandler = $this->getMockBuilder(RestExport::class)
      ->disableOriginalConstructor()
      ->getMock();
    $this->displayHandler
      ->expects($this->any())
      ->method('getContentType')
      ->willReturn('json');
  }
  
  /**
   * Tests that the symfony serializer receives style plugin from the render() method.
   *
   * @covers ::render
   */
  public function testSerializerReceivesOptions() {
    $mock_serializer = $this->prophesize(SerializerInterface::class);
    // This is the main expectation of the test. We want to make sure the
    // serializer options are passed to the SerializerInterface object.
    $mock_serializer->serialize([], 'json', Argument::that(function ($argument) {
      return isset($argument['views_style_plugin']) && $argument['views_style_plugin'] instanceof Serializer;
    }))
      ->willReturn()
      ->shouldBeCalled();
    $view_serializer_style = new Serializer([], 'dummy_serializer', [], $mock_serializer->reveal(), [
      'json',
      'xml',
    ], [
      'json' => 'serialization',
      'xml' => 'serialization',
    ]);
    $view_serializer_style->options = [
      'formats' => [
        'xml',
        'json',
      ],
    ];
    $view_serializer_style->view = $this->view;
    $view_serializer_style->displayHandler = $this->displayHandler;
    $view_serializer_style->render();
  }

}