Bug 927349 part 27 - Make DevTools actor wait on ready promise when playing; r=pbrosset

toolkit/devtools/server/actors/animation.js

@@ -178,6 +178,7 @@ let AnimationPlayerActor = ActorClass({
    */
   play: method(function() {
     this.player.play();
+    return this.player.ready;
   }, {
     request: {},
     response: {}

toolkit/devtools/server/tests/browser/browser_animation_actors_04.js

@@ -38,8 +38,11 @@ function* playStateIsUpdatedDynamically(walker, front) {
 
   let [player] = yield front.getAnimationPlayersForNode(node);
 
-  is(player.initialState.playState, "running",
-    "The playState is running while the transition is running");
+  // Bug 1113091 - We should wait for the player to become ready then
+  // test for the "running" state only
+  ok(player.initialState.playState == "running" ||
+     player.initialState.playState == "pending",
+    "The playState is running or pending while the transition is running");
 
   info("Wait until the animation stops (more than 1000ms)");
   yield wait(1500); // Waiting 1.5sec for good measure