1 files changed, 52 insertions, 0 deletions
diff --git a/devtools/client/inspector/animation/test/browser_animation_animated-property-list.js b/devtools/client/inspector/animation/test/browser_animation_animated-property-list.js
new file mode 100644
index 0000000000..2516f47c79
--- /dev/null
+++ b/devtools/client/inspector/animation/test/browser_animation_animated-property-list.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test following animated property list test.
+// 1. Existence for animated property list.
+// 2. Number of animated property item.
+
+const TEST_DATA = [
+  {
+    targetClass: "animated",
+    expectedNumber: 1,
+  },
+  {
+    targetClass: "compositor-notall",
+    expectedNumber: 3,
+  },
+];
+
+add_task(async function () {
+  await addTab(URL_ROOT + "doc_simple_animation.html");
+  await removeAnimatedElementsExcept(TEST_DATA.map(t => `.${t.targetClass}`));
+  const { animationInspector, panel } = await openAnimationInspector();
+
+  info("Checking animated property list and items existence at initial");
+  ok(
+    !panel.querySelector(".animated-property-list"),
+    "The animated-property-list should not be in the DOM at initial"
+  );
+
+  for (const { targetClass, expectedNumber } of TEST_DATA) {
+    info(
+      `Checking animated-property-list and items existence at ${targetClass}`
+    );
+    await clickOnAnimationByTargetSelector(
+      animationInspector,
+      panel,
+      `.${targetClass}`
+    );
+
+    await waitUntil(
+      () =>
+        panel.querySelectorAll(".animated-property-item").length ===
+        expectedNumber
+    );
+    ok(
+      true,
+      `The number of animated-property-list should be ${expectedNumber} at ${targetClass}`
+    );
+  }
+});