Dactyloidae/dom/animation/test/css-transitions/file_csstransition-events.html

<!doctype html>
<meta charset=utf-8>
<title>Tests for CSS-Transition events</title>
<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#transition-events">
<script src="../testcommon.js"></script>
<body>
<script>
'use strict';

/**
 * Helper class to record the elapsedTime member of each event.
 * The EventWatcher class in testharness.js allows us to wait on
 * multiple events in a certain order but only records the event
 * parameters of the most recent event.
 */
function TransitionEventHandler(target) {
  this.target = target;
  this.target.ontransitionrun = function(evt) {
    this.transitionrun = evt.elapsedTime;
  }.bind(this);
  this.target.ontransitionstart = function(evt) {
    this.transitionstart = evt.elapsedTime;
  }.bind(this);
  this.target.ontransitionend = function(evt) {
    this.transitionend = evt.elapsedTime;
  }.bind(this);
}

TransitionEventHandler.prototype.clear = function() {
  this.transitionrun   = undefined;
  this.transitionstart = undefined;
  this.transitionend   = undefined;
};

function setupTransition(t, transitionStyle) {
  var div, watcher, handler, transition;
  transitionStyle = transitionStyle || 'transition: margin-left 100s 100s';
  div = addDiv(t, { style: transitionStyle });
  watcher = new EventWatcher(t, div, [ 'transitionrun',
                                       'transitionstart',
                                       'transitionend' ]);
  handler = new TransitionEventHandler(div);
  flushComputedStyle(div);

  div.style.marginLeft = '100px';
  flushComputedStyle(div);

  transition = div.getAnimations()[0];

  return [transition, watcher, handler];
}

// On the next frame (i.e. when events are queued), whether or not the
// transition is still pending depends on the implementation.
promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  return watcher.wait_for('transitionrun').then(function(evt) {
    assert_equals(evt.elapsedTime, 0.0);
  });
}, 'Idle -> Pending or Before');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Force the transition to leave the idle phase
  transition.startTime = document.timeline.currentTime;
  return watcher.wait_for('transitionrun').then(function(evt) {
    assert_equals(evt.elapsedTime, 0.0);
  });
}, 'Idle -> Before');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Seek to Active phase.
  transition.currentTime = 100 * MS_PER_SEC;
  transition.pause();
  return watcher.wait_for([ 'transitionrun',
                            'transitionstart' ]).then(function(evt) {
    assert_equals(handler.transitionrun, 0.0);
    assert_equals(handler.transitionstart, 0.0);
  });
}, 'Idle or Pending -> Active');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Seek to After phase.
  transition.finish();
  return watcher.wait_for([ 'transitionrun',
                            'transitionstart',
                            'transitionend' ]).then(function(evt) {
    assert_equals(handler.transitionrun, 0.0);
    assert_equals(handler.transitionstart, 0.0);
    assert_equals(handler.transitionend, 100.0);
  });
}, 'Idle or Pending -> After');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);

  return Promise.all([ watcher.wait_for('transitionrun'),
                       transition.ready ]).then(function() {
    transition.currentTime = 100 * MS_PER_SEC;
    return watcher.wait_for('transitionstart');
  }).then(function() {
    assert_equals(handler.transitionstart, 0.0);
  });
}, 'Before -> Active');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  return Promise.all([ watcher.wait_for('transitionrun'),
                       transition.ready ]).then(function() {
    // Seek to After phase.
    transition.currentTime = 200 * MS_PER_SEC;
    return watcher.wait_for([ 'transitionstart', 'transitionend' ]);
  }).then(function(evt) {
    assert_equals(handler.transitionstart, 0.0);
    assert_equals(handler.transitionend, 100.0);
  });
}, 'Before -> After');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Seek to Active phase.
  transition.currentTime = 100 * MS_PER_SEC;
  return watcher.wait_for([ 'transitionrun',
                            'transitionstart' ]).then(function(evt) {
    // Seek to Before phase.
    transition.currentTime = 0;
    return watcher.wait_for('transitionend');
  }).then(function(evt) {
    assert_equals(evt.elapsedTime, 0.0);
  });
}, 'Active -> Before');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Seek to Active phase.
  transition.currentTime = 100 * MS_PER_SEC;
  return watcher.wait_for([ 'transitionrun',
                            'transitionstart' ]).then(function(evt) {
    // Seek to After phase.
    transition.currentTime = 200 * MS_PER_SEC;
    return watcher.wait_for('transitionend');
  }).then(function(evt) {
    assert_equals(evt.elapsedTime, 100.0);
  });
}, 'Active -> After');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Seek to After phase.
  transition.finish();
  return watcher.wait_for([ 'transitionrun',
                            'transitionstart',
                            'transitionend' ]).then(function(evt) {
    // Seek to Before phase.
    transition.currentTime = 0;
    return watcher.wait_for([ 'transitionstart', 'transitionend' ]);
  }).then(function(evt) {
    assert_equals(handler.transitionstart, 100.0);
    assert_equals(handler.transitionend, 0.0);
  });
}, 'After -> Before');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);
  // Seek to After phase.
  transition.finish();
  return watcher.wait_for([ 'transitionrun',
                            'transitionstart',
                            'transitionend' ]).then(function(evt) {
    // Seek to Active phase.
    transition.currentTime = 100 * MS_PER_SEC;
    return watcher.wait_for('transitionstart');
  }).then(function(evt) {
    assert_equals(evt.elapsedTime, 100.0);
  });
}, 'After -> Active');

promise_test(function(t) {
  var [transition, watcher, handler] =
    setupTransition(t, 'transition: margin-left 100s -50s');

  return watcher.wait_for([ 'transitionrun',
                            'transitionstart' ]).then(function() {
    assert_equals(handler.transitionrun, 50.0);
    assert_equals(handler.transitionstart, 50.0);
    transition.finish();
    return watcher.wait_for('transitionend');
  }).then(function(evt) {
    assert_equals(evt.elapsedTime, 100.0);
  });
}, 'Calculating the interval start and end time with negative start delay.');

promise_test(function(t) {
  var [transition, watcher, handler] = setupTransition(t);

  return watcher.wait_for('transitionrun').then(function(evt) {
    // We can't set the end delay via generated effect timing.
    // Because CSS-Transition use the AnimationEffectTimingReadOnly.
    transition.effect = new KeyframeEffect(handler.target,
                                           { marginleft: [ '0px', '100px' ]},
                                           { duration: 100 * MS_PER_SEC,
                                             endDelay: -50 * MS_PER_SEC });
    // Seek to Before and play.
    transition.cancel();
    transition.play();
    return watcher.wait_for('transitionstart');
  }).then(function() {
    assert_equals(handler.transitionstart, 0.0);

    // Seek to After phase.
    transition.finish();
    return watcher.wait_for('transitionend');
  }).then(function(evt) {
    assert_equals(evt.elapsedTime, 50.0);
  });
}, 'Calculating the interval start and end time with negative end delay.');

done();
</script>
</body>
</html>