1 files changed, 14 insertions, 0 deletions
diff --git a/toolkit/modules/tests/xpcshell/test_jsesc.js b/toolkit/modules/tests/xpcshell/test_jsesc.js
new file mode 100644
index 0000000000..1190f065b6
--- /dev/null
+++ b/toolkit/modules/tests/xpcshell/test_jsesc.js
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const { jsesc } = ChromeUtils.import(
+  "resource://gre/modules/third_party/jsesc/jsesc.js"
+);
+
+function run_test() {
+  Assert.equal(jsesc("teééést", { lowercaseHex: true }), "te\\xe9\\xe9\\xe9st");
+  Assert.equal(
+    jsesc("teééést", { lowercaseHex: false }),
+    "te\\xE9\\xE9\\xE9st"
+  );
+}