Test that TypedArray methods don't read length

test/mjsunit/harmony/typedarrays-every.js

Index: test/mjsunit/harmony/typedarrays-every.js
diff --git a/test/mjsunit/harmony/typedarrays-every.js b/test/mjsunit/harmony/typedarrays-every.js
index c81fd966ca623ae268b1d3b257fc07014574bf5f..e6acb566ac61a8adbf96a8b374b509106876cce7 100644
--- a/test/mjsunit/harmony/typedarrays-every.js
+++ b/test/mjsunit/harmony/typedarrays-every.js
@@ -135,6 +135,16 @@ function TestTypedArrayForEach(constructor) {
     constructor.prototype.every.call(a, function (x) { count++; return true; });
     assertEquals(a.length, count);
   }
+
+  // Shadowing length doesn't affect every, unlike Array.prototype.every
+  a = new constructor([1, 2]);
+  Object.defineProperty(a, 'length', {value: 1});
+  var x = 0;
+  assertEquals(a.every(function(elt) { x += elt; return true; }), true);
+  assertEquals(x, 3);
+  assertEquals(Array.prototype.every.call(a,
+      function(elt) { x += elt; return true; }), true);
+  assertEquals(x, 4);
 }
 
 for (i = 0; i < typedArrayConstructors.length; i++) {