gecko-dev/dom/media/test/fragment_noplay.js

function test_fragment_noplay(v, start, end, is, ok, finish) {
  function onLoadedMetadata() {
    var s = start == null ? 0 : start;
    var e = end == null ? v.duration : end;
    var a = s - 0.15;
    var b = s + 0.15;
    ok(
      v.currentTime >= a && v.currentTime <= b,
      "loadedmetadata currentTime is " + a + " < " + v.currentTime + " < " + b
    );
    ok(
      v.mozFragmentEnd == e,
      "mozFragmentEnd (" + v.mozFragmentEnd + ") == end Time (" + e + ")"
    );
    finish();
  }

  v.addEventListener("loadedmetadata", onLoadedMetadata);
}