function makeLiveTimeline(availability, delay, autoCorrectDrift = true) {
    const now = Date.now() / 1000;
    const timeline = makePresentationTimeline(
        /* static= */ false, /* duration= */ Infinity, /* start= */ now,
        availability, /* max= */ 10,
        /* clock= */ 0, delay || 0, autoCorrectDrift);
    expect(timeline.isLive()).toBe(true);
    expect(timeline.isInProgress()).toBe(false);
    return timeline;
  }
Creates a live PresentationTimeline.

@param {number} availability
@param {number=} delay
@param {boolean=} autoCorrectDrift
@return {shaka.media.PresentationTimeline}