1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/truthiness/if-equal-undefined.js b/js/src/jit-test/tests/truthiness/if-equal-undefined.js
new file mode 100644
index 000000000..fd7d2abe4
--- /dev/null
+++ b/js/src/jit-test/tests/truthiness/if-equal-undefined.js
@@ -0,0 +1,46 @@
+var counterF = 0;
+
+function f(v, value)
+{
+  if (v == undefined)
+    counterF++;
+  assertEq(counterF, value,
+           "failed: " + v + " " + value);
+}
+
+f({}, 0);
+f({}, 0);
+f(null, 1);
+f(null, 2);
+f(undefined, 3);
+f(undefined, 4);
+f(objectEmulatingUndefined(), 5);
+f(objectEmulatingUndefined(), 6);
+f(Object.prototype, 6);
+f(Object.prototype, 6);
+
+var counterG = 0;
+
+function g(v, value)
+{
+  if (v == undefined)
+    counterG++;
+  assertEq(counterG, value,
+           "failed: " + v + " " + value);
+}
+
+g({}, 0);
+g({}, 0);
+
+var counterH = 0;
+
+function h(v, value)
+{
+  if (v == undefined)
+    counterH++;
+  assertEq(counterH, value,
+           "failed: " + v + " " + value);
+}
+
+h(objectEmulatingUndefined(), 1);
+h(objectEmulatingUndefined(), 2);