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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+<!doctype html>
+<html>
+ <head>
+ <meta charset=utf-8>
+ <title>Tests for the effect of setting a CSS transition's
+ Animation.startTime</title>
+ <style>
+
+.animated-div {
+ margin-left: 100px;
+ transition: margin-left 1000s linear 1000s;
+}
+
+ </style>
+ <script src="../testcommon.js"></script>
+ </head>
+ <body>
+ <script type="text/javascript">
+
+'use strict';
+
+// TODO: Once the computedTiming property is implemented, add checks to the
+// checker helpers to ensure that computedTiming's properties are updated as
+// expected.
+// See https://bugzilla.mozilla.org/show_bug.cgi?id=1108055
+
+
+const ANIM_DELAY_MS = 1000000; // 1000s
+const ANIM_DUR_MS = 1000000; // 1000s
+
+/**
+ * These helpers get the value that the startTime needs to be set to, to put an
+ * animation that uses the above ANIM_DELAY_MS and ANIM_DUR_MS values into the
+ * middle of various phases or points through the active duration.
+ */
+function startTimeForBeforePhase(timeline) {
+ return timeline.currentTime - ANIM_DELAY_MS / 2;
+}
+function startTimeForActivePhase(timeline) {
+ return timeline.currentTime - ANIM_DELAY_MS - ANIM_DUR_MS / 2;
+}
+function startTimeForAfterPhase(timeline) {
+ return timeline.currentTime - ANIM_DELAY_MS - ANIM_DUR_MS - ANIM_DELAY_MS / 2;
+}
+function startTimeForStartOfActiveInterval(timeline) {
+ return timeline.currentTime - ANIM_DELAY_MS;
+}
+function startTimeForFiftyPercentThroughActiveInterval(timeline) {
+ return timeline.currentTime - ANIM_DELAY_MS - ANIM_DUR_MS * 0.5;
+}
+function startTimeForEndOfActiveInterval(timeline) {
+ return timeline.currentTime - ANIM_DELAY_MS - ANIM_DUR_MS;
+}
+
+
+// Expected computed 'margin-left' values at points during the active interval:
+// When we assert_between_inclusive using these values we could in theory cause
+// intermittent failure due to very long delays between paints, but since the
+// active duration is 1000s long, a delay would need to be around 100s to cause
+// that. If that's happening then there are likely other issues that should be
+// fixed, so a failure to make us look into that seems like a good thing.
+const INITIAL_POSITION = 100;
+const TEN_PCT_POSITION = 110;
+const FIFTY_PCT_POSITION = 150;
+const END_POSITION = 200;
+
+// The terms used for the naming of the following helper functions refer to
+// terms used in the Web Animations specification for specific phases of an
+// animation. The terms can be found here:
+//
+// https://w3c.github.io/web-animations/#animation-effect-phases-and-states
+//
+// Note the distinction between the "animation start time" which occurs before
+// the start delay and the start of the active interval which occurs after it.
+
+// Called when the ready Promise's callbacks should happen
+function checkStateOnReadyPromiseResolved(animation)
+{
+ assert_less_than_equal(animation.startTime, animation.timeline.currentTime,
+ 'Animation.startTime should be less than the timeline\'s ' +
+ 'currentTime on the first paint tick after animation creation');
+
+ assert_equals(animation.playState, 'running',
+ 'Animation.playState should be "running" on the first paint ' +
+ 'tick after animation creation');
+
+ var div = animation.effect.target;
+ var marginLeft = parseFloat(getComputedStyle(div).marginLeft);
+ assert_equals(marginLeft, INITIAL_POSITION,
+ 'the computed value of margin-left should be unaffected ' +
+ 'by an animation with a delay on ready Promise resolve');
+}
+
+// Called when startTime is set to the time the active interval starts.
+function checkStateAtActiveIntervalStartTime(animation)
+{
+ // We don't test animation.startTime since our caller just set it.
+
+ assert_equals(animation.playState, 'running',
+ 'Animation.playState should be "running" at the start of ' +
+ 'the active interval');
+
+ var div = animation.effect.target;
+ var marginLeft = parseFloat(getComputedStyle(div).marginLeft);
+ assert_between_inclusive(marginLeft, INITIAL_POSITION, TEN_PCT_POSITION,
+ 'the computed value of margin-left should be close to the value at the ' +
+ 'beginning of the animation');
+}
+
+function checkStateAtFiftyPctOfActiveInterval(animation)
+{
+ // We don't test animation.startTime since our caller just set it.
+
+ var div = animation.effect.target;
+ var marginLeft = parseFloat(getComputedStyle(div).marginLeft);
+ assert_equals(marginLeft, FIFTY_PCT_POSITION,
+ 'the computed value of margin-left should be half way through the ' +
+ 'animation at the midpoint of the active interval');
+}
+
+// Called when startTime is set to the time the active interval ends.
+function checkStateAtActiveIntervalEndTime(animation)
+{
+ // We don't test animation.startTime since our caller just set it.
+
+ assert_equals(animation.playState, 'finished',
+ 'Animation.playState should be "finished" at the end of ' +
+ 'the active interval');
+
+ var div = animation.effect.target;
+ var marginLeft = parseFloat(getComputedStyle(div).marginLeft);
+ assert_equals(marginLeft, END_POSITION,
+ 'the computed value of margin-left should be the final transitioned-to ' +
+ 'value at the end of the active duration');
+}
+
+test(function(t)
+{
+ var div = addDiv(t, {'class': 'animated-div'});
+ flushComputedStyle(div);
+ div.style.marginLeft = '200px'; // initiate transition
+
+ var animation = div.getAnimations()[0];
+ assert_equals(animation.startTime, null, 'startTime is unresolved');
+}, 'startTime of a newly created transition is unresolved');
+
+
+test(function(t)
+{
+ var div = addDiv(t, {'class': 'animated-div'});
+ flushComputedStyle(div);
+ div.style.marginLeft = '200px'; // initiate transition
+
+ var animation = div.getAnimations()[0];
+ var currentTime = animation.timeline.currentTime;
+ animation.startTime = currentTime;
+ assert_approx_equals(animation.startTime, currentTime, 0.0001, // rounding error
+ 'Check setting of startTime actually works');
+}, 'Sanity test to check round-tripping assigning to new animation\'s ' +
+ 'startTime');
+
+
+async_test(function(t) {
+ var div = addDiv(t, {'class': 'animated-div'});
+ var eventWatcher = new EventWatcher(t, div, 'transitionend');
+
+ flushComputedStyle(div);
+ div.style.marginLeft = '200px'; // initiate transition
+
+ var animation = div.getAnimations()[0];
+
+ animation.ready.then(t.step_func(function() {
+ checkStateOnReadyPromiseResolved(animation);
+
+ animation.startTime = startTimeForStartOfActiveInterval(animation.timeline);
+ checkStateAtActiveIntervalStartTime(animation);
+
+ animation.startTime =
+ startTimeForFiftyPercentThroughActiveInterval(animation.timeline);
+ checkStateAtFiftyPctOfActiveInterval(animation);
+
+ animation.startTime = startTimeForEndOfActiveInterval(animation.timeline);
+ return eventWatcher.wait_for('transitionend');
+ })).then(t.step_func(function() {
+ checkStateAtActiveIntervalEndTime(animation);
+ })).catch(t.step_func(function(reason) {
+ assert_unreached(reason);
+ })).then(function() {
+ t.done();
+ });
+}, 'Skipping forward through animation');
+
+
+test(function(t) {
+ var div = addDiv(t, {'class': 'animated-div'});
+ var eventWatcher = new EventWatcher(t, div, 'transitionend');
+
+ flushComputedStyle(div);
+ div.style.marginLeft = '200px'; // initiate transition
+
+ var animation = div.getAnimations()[0];
+
+ // Unlike in the case of CSS animations, we cannot skip to the end and skip
+ // backwards since when we reach the end the transition effect is removed and
+ // changes to the Animation object no longer affect the element. For
+ // this reason we only skip forwards as far as the 90% through point.
+
+ animation.startTime =
+ startTimeForFiftyPercentThroughActiveInterval(animation.timeline);
+ checkStateAtFiftyPctOfActiveInterval(animation);
+
+ animation.startTime = startTimeForStartOfActiveInterval(animation.timeline);
+
+ // Despite going backwards from being in the active interval to being before
+ // it, we now expect an 'animationend' event because the animation should go
+ // from being active to inactive.
+ //
+ // Calling checkStateAtActiveIntervalStartTime will check computed style,
+ // causing computed style to be updated and the 'transitionend' event to
+ // be dispatched synchronously. We need to call waitForEvent first
+ // otherwise eventWatcher will assert that the event was unexpected.
+ eventWatcher.wait_for('transitionend').then(function() {
+ t.done();
+ });
+ checkStateAtActiveIntervalStartTime(animation);
+}, 'Skipping backwards through transition');
+
+
+async_test(function(t) {
+ var div = addDiv(t, {'class': 'animated-div'});
+
+ flushComputedStyle(div);
+ div.style.marginLeft = '200px'; // initiate transition
+
+ var animation = div.getAnimations()[0];
+
+ var storedCurrentTime;
+
+ animation.ready.then(t.step_func(function() {
+ storedCurrentTime = animation.currentTime;
+ animation.startTime = null;
+ return animation.ready;
+ })).catch(t.step_func(function(reason) {
+ assert_unreached(reason);
+ })).then(t.step_func(function() {
+ assert_equals(animation.currentTime, storedCurrentTime,
+ 'Test that hold time is correct');
+ t.done();
+ }));
+}, 'Setting startTime to null');
+
+
+async_test(function(t) {
+ var div = addDiv(t, {'class': 'animated-div'});
+
+ flushComputedStyle(div);
+ div.style.marginLeft = '200px'; // initiate transition
+
+ var animation = div.getAnimations()[0];
+
+ animation.ready.then(t.step_func(function() {
+ var savedStartTime = animation.startTime;
+
+ assert_not_equals(animation.startTime, null,
+ 'Animation.startTime not null on ready Promise resolve');
+
+ animation.pause();
+ return animation.ready;
+ })).then(t.step_func(function() {
+ assert_equals(animation.startTime, null,
+ 'Animation.startTime is null after paused');
+ assert_equals(animation.playState, 'paused',
+ 'Animation.playState is "paused" after pause() call');
+ })).catch(t.step_func(function(reason) {
+ assert_unreached(reason);
+ })).then(function() {
+ t.done();
+ });
+}, 'Animation.startTime after paused');
+
+done();
+ </script>
+ </body>
+</html>
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