1 files changed, 27 insertions, 0 deletions
diff --git a/testing/mochitest/tests/browser/browser_fail_add_task.js b/testing/mochitest/tests/browser/browser_fail_add_task.js
new file mode 100644
index 0000000000..aeb1129943
--- /dev/null
+++ b/testing/mochitest/tests/browser/browser_fail_add_task.js
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+setExpectedFailuresForSelfTest(4);
+
+function rejectOnNextTick(error) {
+  return new Promise((resolve, reject) => executeSoon(() => reject(error)));
+}
+
+add_task(async function failWithoutError() {
+  await rejectOnNextTick(undefined);
+});
+
+add_task(async function failWithString() {
+  await rejectOnNextTick("This is a string");
+});
+
+add_task(async function failWithInt() {
+  await rejectOnNextTick(42);
+});
+
+// This one should display a stack trace
+add_task(async function failWithError() {
+  await rejectOnNextTick(new Error("This is an error"));
+});