Bug 1234403 - Part 3: Test for the CSSPseudoElement objects returned by effect.target. r=birtles

dom/animation/test/css-animations/file_effect-target.html

@@ -14,7 +14,40 @@ test(function(t) {
   var animation = div.getAnimations()[0];
   assert_equals(animation.effect.target, div,
     'Animation.target is the animatable div');
-}, 'Returned CSS animations have the correct Animation.target');
+}, 'Returned CSS animations have the correct effect target');
+
+test(function(t) {
+  addStyle(t, { '.after::after': 'animation: anim 10s, anim 100s;' });
+  var div = addDiv(t, { class: 'after' });
+  var anims = document.getAnimations();
+  assert_equals(anims.length, 2,
+                'Got animations running on ::after pseudo element');
+  assert_equals(anims[0].effect.target, anims[1].effect.target,
+                'Both animations return the same target object');
+}, 'effect.target should return the same CSSPseudoElement object each time');
+
+test(function(t) {
+  addStyle(t, { '.after::after': 'animation: anim 10s;' });
+  var div = addDiv(t, { class: 'after' });
+  var pseudoTarget = document.getAnimations()[0].effect.target;
+  var effect = new KeyframeEffectReadOnly(pseudoTarget,
+                                          { background: ["blue", "red"] },
+                                          3000);
+  var newAnim = new Animation(effect, document.timeline);
+  newAnim.play();
+  var anims = document.getAnimations();
+  assert_equals(anims.length, 2,
+                'Got animations running on ::after pseudo element');
+  assert_not_equals(anims[0], newAnim,
+                    'The scriped-generated animation appears last');
+  assert_equals(newAnim.effect.target, pseudoTarget,
+                'The effect.target of the scripted-generated animation is ' +
+                'the same as the one from the argument of ' +
+                'KeyframeEffectReadOnly constructor');
+  assert_equals(anims[0].effect.target, newAnim.effect.target,
+                'Both animations return the same target object');
+}, 'effect.target from the script-generated animation should return the same ' +
+   'CSSPseudoElement object as that from the CSS generated animation');
 
 done();
 </script>

dom/animation/test/css-transitions/file_effect-target.html

@@ -18,6 +18,49 @@ test(function(t) {
     'Animation.target is the animatable div');
 }, 'Returned CSS transitions have the correct Animation.target');
 
+test(function(t) {
+  addStyle(t, { '.init::after': 'content: ""; width: 0px; height: 0px; ' +
+                                'transition: all 10s;',
+                '.change::after': 'width: 100px; height: 100px;' });
+  var div = addDiv(t, { class: 'init' });
+  flushComputedStyle(div);
+  div.classList.add('change');
+
+  var anims = document.getAnimations();
+  assert_equals(anims.length, 2,
+                'Got transitions running on ::after pseudo element');
+  assert_equals(anims[0].effect.target, anims[1].effect.target,
+                'Both transitions return the same target object');
+}, 'effect.target should return the same CSSPseudoElement object each time');
+
+test(function(t) {
+  addStyle(t, { '.init::after': 'content: ""; width: 0px; transition: all 10s;',
+                '.change::after': 'width: 100px;' });
+  var div = addDiv(t, { class: 'init' });
+  flushComputedStyle(div);
+  div.classList.add('change');
+  var pseudoTarget = document.getAnimations()[0].effect.target;
+  var effect = new KeyframeEffectReadOnly(pseudoTarget,
+                                          { background: ["blue", "red"] },
+                                          3000);
+  var newAnim = new Animation(effect, document.timeline);
+  newAnim.play();
+
+  var anims = document.getAnimations();
+  assert_equals(anims.length, 2,
+                'Got animations running on ::after pseudo element');
+  assert_not_equals(anims[0], newAnim,
+                    'The scriped-generated animation appears last');
+  assert_equals(newAnim.effect.target, pseudoTarget,
+                'The effect.target of the scripted-generated animation is ' +
+                'the same as the one from the argument of ' +
+                'KeyframeEffectReadOnly constructor');
+  assert_equals(anims[0].effect.target, newAnim.effect.target,
+                'Both the transition and the scripted-generated animation ' +
+                'return the same target object');
+}, 'effect.target from the script-generated animation should return the same ' +
+   'CSSPseudoElement object as that from the CSS generated transition');
+
 done();
 </script>
 </body>

dom/animation/test/testcommon.js

@@ -29,6 +29,34 @@ function addDiv(t, attrs) {
   return div;
 }
 
+/**
+ * Appends a style div to the document head.
+ *
+ * @param t  The testharness.js Test object. If provided, this will be used
+ *           to register a cleanup callback to remove the style element
+ *           when the test finishes.
+ *
+ * @param rules  A dictionary object with selector names and rules to set on
+ *               the style sheet.
+ */
+function addStyle(t, rules) {
+  var extraStyle = document.createElement('style');
+  document.head.appendChild(extraStyle);
+  if (rules) {
+    var sheet = extraStyle.sheet;
+    for (var selector in rules) {
+      sheet.insertRule(selector + '{' + rules[selector] + '}',
+                       sheet.cssRules.length);
+    }
+  }
+
+  if (t && typeof t.add_cleanup === 'function') {
+    t.add_cleanup(function() {
+      extraStyle.remove();
+    });
+  }
+}
+
 /**
  * Promise wrapper for requestAnimationFrame.
  */