1 files changed, 51 insertions, 0 deletions
diff --git a/devtools/client/animationinspector/test/browser_animation_timeline_rewind_button.js b/devtools/client/animationinspector/test/browser_animation_timeline_rewind_button.js
new file mode 100644
index 000000000..c4dcbd161
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+++ b/devtools/client/animationinspector/test/browser_animation_timeline_rewind_button.js
@@ -0,0 +1,51 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+requestLongerTimeout(2);
+
+// Check that the timeline toolbar contains a rewind button and that it can be
+// clicked. Check that when it is, the current animations displayed in the
+// timeline get their playstates changed to paused, and their currentTimes
+// reset to 0, and that the scrubber stops moving and is positioned to the
+// start.
+
+add_task(function* () {
+  yield addTab(URL_ROOT + "doc_simple_animation.html");
+
+  let {panel, controller} = yield openAnimationInspector();
+  let players = controller.animationPlayers;
+  let btn = panel.rewindTimelineButtonEl;
+
+  ok(btn, "The rewind button exists");
+
+  info("Click on the button to rewind all timeline animations");
+  yield clickTimelineRewindButton(panel);
+
+  info("Check that the scrubber has stopped moving");
+  yield assertScrubberMoving(panel, false);
+
+  ok(players.every(({state}) => state.currentTime === 0),
+     "All animations' currentTimes have been set to 0");
+  ok(players.every(({state}) => state.playState === "paused"),
+     "All animations have been paused");
+
+  info("Play the animations again");
+  yield clickTimelinePlayPauseButton(panel);
+
+  info("And pause them after a short while");
+  yield new Promise(r => setTimeout(r, 200));
+
+  info("Check that rewinding when animations are paused works too");
+  yield clickTimelineRewindButton(panel);
+
+  info("Check that the scrubber has stopped moving");
+  yield assertScrubberMoving(panel, false);
+
+  ok(players.every(({state}) => state.currentTime === 0),
+     "All animations' currentTimes have been set to 0");
+  ok(players.every(({state}) => state.playState === "paused"),
+     "All animations have been paused");
+});