michael@0: // Array.prototype.iterator is generic.
michael@0: // That is, it can be applied to arraylike objects and strings, not just arrays.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: function test(obj) {
michael@0:     var it = Array.prototype[std_iterator].call(obj);
michael@0:     var ki = Array.prototype.keys.call(obj);
michael@0:     var ei = Array.prototype.entries.call(obj);
michael@0:     for (var i = 0; i < (obj.length >>> 0); i++) {
michael@0:         assertIteratorNext(it, obj[i]);
michael@0:         assertIteratorNext(ki, i);
michael@0:         assertIteratorNext(ei, [i, obj[i]]);
michael@0:     }
michael@0:     assertIteratorDone(it, undefined);
michael@0:     assertIteratorDone(ki, undefined);
michael@0:     assertIteratorDone(ei, undefined);
michael@0: }
michael@0: 
michael@0: test({length: 0});
michael@0: test({length: 0, 0: 'x', 1: 'y'});
michael@0: test({length: 2, 0: 'x', 1: 'y'});
michael@0: test(Object.create(['x', 'y', 'z']));
michael@0: test(Object.create({length: 2, 0: 'x', 1: 'y'}));
michael@0: test("");
michael@0: test("ponies");
michael@0: 
michael@0: // Perverse length values.
michael@0: test({length: 0x1f00000000});
michael@0: test({length: -0xfffffffe, 0: 'a', 1: 'b'});
michael@0: test({length: "011", 9: 9, 10: 10, 11: 11});
michael@0: test({length: -0});
michael@0: test({length: 2.7, 0: 0, 1: 1, 2: 2});
michael@0: test({length: {valueOf: function () { return 3; }}, 0: 0, 1: 1, 2: 2});