1 files changed, 51 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/mochitest/test_ext_action.html b/toolkit/components/extensions/test/mochitest/test_ext_action.html
new file mode 100644
index 0000000000..1899475723
--- /dev/null
+++ b/toolkit/components/extensions/test/mochitest/test_ext_action.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Action with MV3</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
+  <script type="text/javascript" src="head.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
+</head>
+<body>
+
+<script type="text/javascript">
+"use strict";
+
+
+add_task(async function setup() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["extensions.manifestV3.enabled", true]],
+  });
+});
+
+add_task(async function test_action_onClicked() {
+  const extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      manifest_version: 3,
+      action: {},
+    },
+    background() {
+      browser.action.onClicked.addListener(async () => {
+        browser.test.notifyPass("action-clicked");
+      });
+
+      browser.test.sendMessage("background-ready");
+    },
+  });
+
+  await extension.startup();
+  await extension.awaitMessage("background-ready");
+
+  await AppTestDelegate.clickBrowserAction(window, extension);
+  await extension.awaitFinish("action-clicked");
+  await AppTestDelegate.closeBrowserAction(window, extension);
+
+  await extension.unload();
+});
+
+</script>
+
+</body>
+</html>