1 files changed, 59 insertions, 0 deletions
diff --git a/toolkit/components/search/tests/xpcshell/test_webextensions_startup_duplicate.js b/toolkit/components/search/tests/xpcshell/test_webextensions_startup_duplicate.js
new file mode 100644
index 0000000000..3e42fdee13
--- /dev/null
+++ b/toolkit/components/search/tests/xpcshell/test_webextensions_startup_duplicate.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const lazy = {};
+
+const { promiseShutdownManager, promiseStartupManager } = AddonTestUtils;
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  ExtensionTestUtils:
+    "resource://testing-common/ExtensionXPCShellUtils.sys.mjs",
+});
+
+add_setup(async function () {
+  let server = useHttpServer();
+  server.registerContentType("sjs", "sjs");
+  await SearchTestUtils.useTestEngines("test-extensions");
+  await promiseStartupManager();
+
+  registerCleanupFunction(async () => {
+    await promiseShutdownManager();
+  });
+});
+
+add_task(async function test_install_duplicate_engine_startup() {
+  let name = "Plain";
+  let id = "plain@tests.mozilla.org";
+  consoleAllowList.push(
+    `#installExtensionEngine failed for ${id}`,
+    `An engine called ${name} already exists`
+  );
+  // Do not use SearchTestUtils.installSearchExtension, as we need to manually
+  // start the search service after installing the extension.
+  let extensionInfo = {
+    useAddonManager: "permanent",
+    files: {},
+    manifest: SearchTestUtils.createEngineManifest({
+      name,
+      search_url: "https://example.com/plain",
+    }),
+  };
+
+  let extension = lazy.ExtensionTestUtils.loadExtension(extensionInfo);
+  await extension.startup();
+
+  await Services.search.init();
+
+  await AddonTestUtils.waitForSearchProviderStartup(extension);
+  let engine = await Services.search.getEngineByName(name);
+  let submission = engine.getSubmission("foo");
+  Assert.equal(
+    submission.uri.spec,
+    "https://duckduckgo.com/?q=foo&t=ffsb",
+    "Should have not changed the app provided engine."
+  );
+
+  await extension.unload();
+});