1 files changed, 28 insertions, 0 deletions
diff --git a/devtools/client/animationinspector/test/browser_animation_timeline_scrubber_moves.js b/devtools/client/animationinspector/test/browser_animation_timeline_scrubber_moves.js
new file mode 100644
index 000000000..494c581a4
--- /dev/null
+++ b/devtools/client/animationinspector/test/browser_animation_timeline_scrubber_moves.js
@@ -0,0 +1,28 @@
+/* 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 scrubber in the timeline moves when animations are playing.
+// The animations in the test page last for a very long time, so the test just
+// measures the position of the scrubber once, then waits for some time to pass
+// and measures its position again.
+
+add_task(function* () {
+  yield addTab(URL_ROOT + "doc_simple_animation.html");
+  let {panel} = yield openAnimationInspector();
+
+  let timeline = panel.animationsTimelineComponent;
+  let scrubberEl = timeline.scrubberEl;
+  let startPos = scrubberEl.getBoundingClientRect().left;
+
+  info("Wait for some time to check that the scrubber moves");
+  yield new Promise(r => setTimeout(r, 2000));
+
+  let endPos = scrubberEl.getBoundingClientRect().left;
+
+  ok(endPos > startPos, "The scrubber has moved");
+});