static async callCreateSegmentIndex(manifest) {
    const stream = manifest.variants[0].video;
    await expectAsync(stream.createSegmentIndex()).toBeRejected();
  }
Calls the createSegmentIndex function of the manifest.  Because we are
returning fake data, the parser will fail to parse the segment index; we
swallow the error and return a promise that will resolve.

@param {shaka.extern.Manifest} manifest
@return {!Promise}