1 files changed, 33 insertions, 0 deletions
diff --git a/toolkit/mozapps/downloads/tests/unit/test_unspecified_arguments.js b/toolkit/mozapps/downloads/tests/unit/test_unspecified_arguments.js
new file mode 100644
index 0000000000..eb512d93ab
--- /dev/null
+++ b/toolkit/mozapps/downloads/tests/unit/test_unspecified_arguments.js
@@ -0,0 +1,33 @@
+/* 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/. */
+
+/**
+ * Make sure passing null and nothing to various variable-arg DownloadUtils
+ * methods provide the same result.
+ */
+
+const { DownloadUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/DownloadUtils.sys.mjs"
+);
+
+function run_test() {
+  Assert.equal(
+    DownloadUtils.getDownloadStatus(1000, null, null, null) + "",
+    DownloadUtils.getDownloadStatus(1000) + ""
+  );
+  Assert.equal(
+    DownloadUtils.getDownloadStatus(1000, null, null) + "",
+    DownloadUtils.getDownloadStatus(1000, null) + ""
+  );
+
+  Assert.equal(
+    DownloadUtils.getTransferTotal(1000, null) + "",
+    DownloadUtils.getTransferTotal(1000) + ""
+  );
+
+  Assert.equal(
+    DownloadUtils.getTimeLeft(1000, null) + "",
+    DownloadUtils.getTimeLeft(1000) + ""
+  );
+}