<!DOCTYPE html>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>

<script>
test(function() {
  var startTime = document.timeline.currentTime;
  assert_greater_than_equal(startTime, 0);
  var start = performance.now();
  while (performance.now() < start + 250)
    /* wait */;
  assert_equals(document.timeline.currentTime, startTime);
}, 'document.timeline.currentTime should not change within a script block.');

(function() {
  var timeoutTest = async_test('document.timeline.currentTime time should change after a script timeout');
  var startTime = document.timeline.currentTime;

  setTimeout(function() {
    timeoutTest.step(function() {
      assert_greater_than(document.timeline.currentTime, startTime);
    });
    timeoutTest.done();
  }, 100);
})();

(function() {
  var rafTest = async_test('document.timeline.currentTime time should be the same for all RAF callbacks in a frame');
  var startTime = document.timeline.currentTime;
  var firstRafTime;

  requestAnimationFrame(function() {
    rafTest.step(function() {
      assert_greater_than_equal(document.timeline.currentTime, startTime);
      firstRafTime = document.timeline.currentTime;
    });
  });

  requestAnimationFrame(function() {
    rafTest.step(function() {
      assert_equals(document.timeline.currentTime, firstRafTime);
    });
    rafTest.done();
  });
})();

(function() {
  var timeoutTest = async_test('document.timeline.currentTime time should use the same reference as performance.now()');

  setTimeout(function() {
    timeoutTest.step(function() {
      assert_less_than(Math.abs(document.timeline.currentTime - performance.now()), 1000);
    });
    timeoutTest.done();
  }, 0);
})();
</script>