public function test_get_oembed_response_data_with_thumbnail() {
    $post          = self::factory()->post->create_and_get();
    $file          = DIR_TESTDATA . '/images/canola.jpg';
    $attachment_id = self::factory()->attachment->create_object(
      $file,
      $post->ID,
      array(
        'post_mime_type' => 'image/jpeg',
      )
    );
    set_post_thumbnail( $post, $attachment_id );

    $data = get_oembed_response_data( $post, 400 );

    $this->assertArrayHasKey( 'thumbnail_url', $data );
    $this->assertArrayHasKey( 'thumbnail_width', $data );
    $this->assertArrayHasKey( 'thumbnail_height', $data );
    $this->assertTrue( 400 >= $data['thumbnail_width'] );
  }