diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/surfaces-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/surfaces-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+// ParallelArray methods throw when passed a this-value that isn't a ParallelArray.
+
+load(libdir + "asserts.js");
+
+function testcase(obj, fn) {
+    assertEq(typeof fn, "function");
+    var args = Array.slice(arguments, 2);
+    assertThrowsInstanceOf(function () { fn.apply(obj, args); }, TypeError);
+}
+
+function test(obj) {
+    function f() {}
+    testcase(obj, ParallelArray.prototype.map, f);
+    testcase(obj, ParallelArray.prototype.reduce, f);
+    testcase(obj, ParallelArray.prototype.scan, f);
+    testcase(obj, ParallelArray.prototype.scatter, [0]);
+    testcase(obj, ParallelArray.prototype.filter, [0]);
+    testcase(obj, ParallelArray.prototype.flatten);
+    testcase(obj, ParallelArray.prototype.partition, 2);
+    testcase(obj, ParallelArray.prototype.get, [1]);
+}
+
+// FIXME(bug 844887) check type of this
+// if (getBuildConfiguration().parallelJS) {
+// test(ParallelArray.prototype);
+// test(Object.create(new ParallelArray));
+// test({});
+// test(null);
+// test(undefined);
+// }