1 files changed, 55 insertions, 0 deletions
diff --git a/devtools/server/tests/browser/browser_animation_updatedState.js b/devtools/server/tests/browser/browser_animation_updatedState.js
new file mode 100644
index 000000000..17d68e9e5
--- /dev/null
+++ b/devtools/server/tests/browser/browser_animation_updatedState.js
@@ -0,0 +1,55 @@
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Check the animation player's updated state
+
+add_task(function* () {
+  let {client, walker, animations} =
+    yield initAnimationsFrontForUrl(MAIN_DOMAIN + "animation.html");
+
+  yield playStateIsUpdatedDynamically(walker, animations);
+
+  yield client.close();
+  gBrowser.removeCurrentTab();
+});
+
+function* playStateIsUpdatedDynamically(walker, animations) {
+  info("Getting the test node (which runs a very long animation)");
+  // The animation lasts for 100s, to avoid intermittents.
+  let node = yield walker.querySelector(walker.rootNode, ".long-animation");
+
+  info("Getting the animation player front for this node");
+  let [player] = yield animations.getAnimationPlayersForNode(node);
+  yield player.ready();
+
+  let state = yield player.getCurrentState();
+  is(state.playState, "running",
+    "The playState is running while the animation is running");
+
+  info("Change the animation's currentTime to be near the end and wait for " +
+       "it to finish");
+  let onFinished = waitForAnimationPlayState(player, "finished");
+  // Set the currentTime to 98s, knowing that the animation lasts for 100s.
+  yield player.setCurrentTime(98 * 1000);
+  state = yield onFinished;
+  is(state.playState, "finished",
+    "The animation has ended and the state has been updated");
+  ok(state.currentTime > player.initialState.currentTime,
+    "The currentTime has been updated");
+}
+
+function* waitForAnimationPlayState(player, playState) {
+  let state = {};
+  while (state.playState !== playState) {
+    state = yield player.getCurrentState();
+    yield wait(500);
+  }
+  return state;
+}
+
+function wait(ms) {
+  return new Promise(r => setTimeout(r, ms));
+}