1 files changed, 75 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arguments/args-attributes.js b/js/src/jit-test/tests/arguments/args-attributes.js
new file mode 100644
index 0000000000..5182202371
--- /dev/null
+++ b/js/src/jit-test/tests/arguments/args-attributes.js
@@ -0,0 +1,75 @@
+function strictArgs() {
+    return (function (a, b, c) {'use strict'; return arguments; })(1, 2);
+}
+
+function normalArgs() {
+    return (function (a, b, c) { return arguments; })(1, 2);
+}
+
+function checkProperty(options, prop, shouldThrow) {
+    var desc, orig;
+    var obj = options.strict ? strictArgs() : normalArgs();
+    var objType = options.strict ? "strict arguments." : "normal arguments.";
+
+    function check() {
+        orig = Object.getOwnPropertyDescriptor(obj, prop);
+
+        var threw = false;
+        try {
+            obj[prop] = obj[prop];
+        }
+        catch (e) {
+            threw = true;
+        }
+        assertEq(threw, shouldThrow, objType + prop + " threw");
+
+        if (orig === undefined) {
+            // The property wasn't defined, so we can skip it.
+            return;
+        }
+
+        desc = Object.getOwnPropertyDescriptor(obj, prop);
+        if ("value" in orig) {
+            assertEq(desc.value, orig.value, objType + prop + " value");
+        } else {
+            assertEq(desc.get, orig.get, objType + prop + " get");
+            assertEq(desc.set, orig.set, objType + prop + " set");
+        }
+        assertEq(desc.writable, orig.writable, objType + prop + " writable");
+        assertEq(desc.enumerable, orig.enumerable, objType + prop + " enumerable");
+        assertEq(desc.configurable, orig.configurable, objType + prop + " configurable");
+    }
+
+    check();
+
+    if (orig && orig.configurable) {
+        if(options.refresh) { obj = options.strict ? strictArgs() : normalArgs(); }
+        Object.defineProperty(obj, prop, {writable: false, enumerable: true});
+        check();
+
+        if(options.refresh) { obj = options.strict ? strictArgs() : normalArgs(); }
+        Object.defineProperty(obj, prop, {writable: true, enumerable: false});
+        check();
+
+        if(options.refresh) { obj = options.strict ? strictArgs() : normalArgs(); }
+        Object.defineProperty(obj, prop, {writable: false, configurable: false});
+        check();
+    }
+}
+
+checkProperty({strict: true, refresh: true}, 'callee', true);
+checkProperty({strict: true, refresh: false}, 'callee', true);
+checkProperty({strict: false, refresh: true}, 'callee', false);
+checkProperty({strict: false, refresh: false}, 'callee', false);
+
+checkProperty({strict: true, refresh: true}, 'length', false);
+checkProperty({strict: true, refresh: false}, 'length', false);
+checkProperty({strict: false, refresh: true}, 'length', false);
+checkProperty({strict: false, refresh: false}, 'length', false);
+
+for (var i = 0; i <= 5; i++) {
+    checkProperty({strict: true, refresh: true}, "" + i, false);
+    checkProperty({strict: true, refresh: false}, "" + i, false);
+    checkProperty({strict: false, refresh: true}, "" + i, false);
+    checkProperty({strict: false, refresh: false}, "" + i, false);
+}