1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testToUpperToLower.js b/js/src/jit-test/tests/basic/testToUpperToLower.js
new file mode 100644
index 0000000000..4bd78f3530
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testToUpperToLower.js
@@ -0,0 +1,9 @@
+function testToUpperToLower() {
+    var s = "Hello", s1, s2;
+    for (i = 0; i < 100; ++i) {
+        s1 = s.toLowerCase();
+        s2 = s.toUpperCase();
+    }
+    return s1 + s2;
+}
+assertEq(testToUpperToLower(), "helloHELLO");