1 files changed, 29 insertions, 0 deletions
diff --git a/devtools/client/inspector/animation/test/browser_animation_infinity-duration_tick-label.js b/devtools/client/inspector/animation/test/browser_animation_infinity-duration_tick-label.js
new file mode 100644
index 0000000000..2a554267c4
--- /dev/null
+++ b/devtools/client/inspector/animation/test/browser_animation_infinity-duration_tick-label.js
@@ -0,0 +1,29 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test of the content of tick label on timeline header
+// with the animation which has infinity duration.
+
+add_task(async function () {
+  await addTab(URL_ROOT + "doc_infinity_duration.html");
+  const { inspector, panel } = await openAnimationInspector();
+
+  info("Check the tick label content with limited duration animation");
+  isnot(
+    panel.querySelector(".animation-list-container .tick-label:last-child")
+      .textContent,
+    "\u221E",
+    "The content should not be \u221E"
+  );
+
+  info("Check the tick label content with infinity duration animation only");
+  await selectNode(".infinity", inspector);
+  await waitUntil(
+    () =>
+      panel.querySelector(".animation-list-container .tick-label:last-child")
+        .textContent === "\u221E"
+  );
+  ok(true, "The content should be \u221E");
+});