1 files changed, 24 insertions, 0 deletions
diff --git a/devtools/client/inspector/animation/test/browser_animation_logic_mutations_fast.js b/devtools/client/inspector/animation/test/browser_animation_logic_mutations_fast.js
new file mode 100644
index 0000000000..516a150e42
--- /dev/null
+++ b/devtools/client/inspector/animation/test/browser_animation_logic_mutations_fast.js
@@ -0,0 +1,24 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test whether the animation inspector will not crash when remove/add animations faster.
+
+add_task(async function () {
+  const tab = await addTab(URL_ROOT + "doc_mutations_fast.html");
+  const { inspector } = await openAnimationInspector();
+
+  info("Check state of the animation inspector after fast mutations");
+  await startFastMutations(tab);
+  ok(
+    inspector.panelWin.document.getElementById("animation-container"),
+    "Animation inspector should be live"
+  );
+});
+
+async function startFastMutations(tab) {
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
+    await content.wrappedJSObject.startFastMutations();
+  });
+}