michael@0: // Array iterators reflect changes to elements of the underlying array.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: var arr = [0, 1, 2];
michael@0: var it = arr[std_iterator]();
michael@0: arr[0] = 1000;
michael@0: arr[2] = 2000;
michael@0: assertIteratorNext(it, 1000);
michael@0: assertIteratorNext(it, 1);
michael@0: assertIteratorNext(it, 2000);
michael@0: assertIteratorDone(it, undefined);
michael@0: 
michael@0: // test that .keys() and .entries() have the same behaviour
michael@0: 
michael@0: arr = [0, 1, 2];
michael@0: var ki = arr.keys();
michael@0: var ei = arr.entries();
michael@0: arr[0] = 1000;
michael@0: arr[2] = 2000;
michael@0: assertIteratorNext(ki, 0);
michael@0: assertIteratorNext(ei, [0, 1000]);
michael@0: assertIteratorNext(ki, 1);
michael@0: assertIteratorNext(ei, [1, 1]);
michael@0: assertIteratorNext(ki, 2);
michael@0: assertIteratorNext(ei, [2, 2000]);
michael@0: assertIteratorDone(ki, undefined);
michael@0: assertIteratorDone(ei, undefined);