1 files changed, 37 insertions, 0 deletions
diff --git a/toolkit/components/passwordmgr/test/unit/test_module_LoginManager.js b/toolkit/components/passwordmgr/test/unit/test_module_LoginManager.js
new file mode 100644
index 0000000000..8ab75bdeef
--- /dev/null
+++ b/toolkit/components/passwordmgr/test/unit/test_module_LoginManager.js
@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Tests the LoginManager module.
+ */
+
+"use strict";
+
+const { LoginManager } = ChromeUtils.importESModule(
+  "resource://gre/modules/LoginManager.sys.mjs"
+);
+
+add_task(async function test_ensureCurrentSyncID() {
+  let loginManager = new LoginManager();
+  await loginManager.setSyncID(1);
+  await loginManager.setLastSync(100);
+
+  // test calling ensureCurrentSyncID with the current sync ID
+  Assert.equal(await loginManager.ensureCurrentSyncID(1), 1);
+  Assert.equal(await loginManager.getSyncID(), 1, "sync ID shouldn't change");
+  Assert.equal(
+    await loginManager.getLastSync(),
+    100,
+    "last sync shouldn't change"
+  );
+
+  // test calling ensureCurrentSyncID with the different sync ID
+  Assert.equal(await loginManager.ensureCurrentSyncID(2), 2);
+  Assert.equal(await loginManager.getSyncID(), 2, "sync ID should be updated");
+  Assert.equal(
+    await loginManager.getLastSync(),
+    0,
+    "last sync should be reset"
+  );
+});