Setting up single-player tests before adding spinner

JavaScript
2316

Now the test passes: https://jsfiddle.net/ga1v0mjr/2/

   it("when init is a video id and has data-id, will use video id", function() {
      //given
      video.dataset.id = "0dgNc5S8cLI";

      //when
      initVideoPlayer("mnfmQe8Mv1g");

      //then
      expect(options.videoId).toBe("mnfmQe8Mv1g");

      //cleanup
      delete video.dataset.id;
    });