michael@0: // Replacing Array.prototype.iterator with something non-callable makes for-of throw.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: function test(v) {
michael@0:     Array.prototype[std_iterator] = v;
michael@0:     assertThrowsInstanceOf(function () { for (var x of []) ; }, TypeError);
michael@0: }
michael@0: test(undefined);
michael@0: test(null);
michael@0: test({});