JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / tests / stress / is-undefined-exit-on-masquerader.js

diff --git a/tests/stress/is-undefined-exit-on-masquerader.js b/tests/stress/is-undefined-exit-on-masquerader.js
new file mode 100644 (file)
index 0000000..0182714
--- /dev/null
+++ b/tests/stress/is-undefined-exit-on-masquerader.js
@@ -0,0 +1,33 @@
+var doMasquerading = false;
+
+function bar(o) {
+    if (doMasquerading)
+        return makeMasquerader();
+    return o;
+}
+
+noInline(bar);
+
+function foo(o) {
+    o = bar(o);
+    return typeof o === "undefined";
+}
+
+noInline(foo);
+
+function test(o, expected) {
+    var result = foo(o);
+    if (result != expected)
+        throw new Error("bad result: " + result);
+}
+
+for (var i = 0; i < 10000; ++i) {
+    test(void 0, true);
+    test(null, false);
+    test(42, false);
+    test({}, false);
+    test("undefined", false);
+}
+
+doMasquerading = true;
+test({}, true);