michael@0: /* test Map.prototype.forEach */
michael@0: 
michael@0: load(libdir + 'asserts.js');
michael@0: load(libdir + 'iteration.js');
michael@0: 
michael@0: // testing success conditions of Map.prototype.forEach
michael@0: 
michael@0: var testMap = new Map();
michael@0: 
michael@0: function callback(value, key, map) {
michael@0:     testMap.set(key, value);
michael@0:     assertEq(map.has(key), true);
michael@0:     assertEq(map.get(key), value);
michael@0: }
michael@0: 
michael@0: var initialMap = new Map([['a', 1], ['b', 2.3], [false, undefined]]);
michael@0: initialMap.forEach(callback);
michael@0: 
michael@0: // test that both the Maps are equal and are in same order
michael@0: var iterator = initialMap[std_iterator]();
michael@0: var count = 0;
michael@0: for (var [k, v] of testMap) {
michael@0:     assertEq(initialMap.has(k), true);
michael@0:     assertEq(initialMap.get(k), testMap.get(k));
michael@0:     assertIteratorNext(iterator, [k, testMap.get(k)]);
michael@0:     count++;
michael@0: }
michael@0: 
michael@0: //check both the Maps we have are equal in size
michael@0: assertEq(initialMap.size, testMap.size);
michael@0: assertEq(initialMap.size, count);
michael@0: 
michael@0: var x = { abc: 'test'};
michael@0: function callback2(value, key, map) {
michael@0:     assertEq(x, this);
michael@0: }
michael@0: initialMap = new Map([['a', 1]]);
michael@0: initialMap.forEach(callback2, x);
michael@0: 
michael@0: // testing failure conditions of Map.prototype.forEach
michael@0: 
michael@0: var s = new Set([1, 2, 3]);
michael@0: assertThrowsInstanceOf(function() {
michael@0:     Map.prototype.forEach.call(s, callback);
michael@0: }, TypeError, "Map.prototype.forEach should raise TypeError if not used on a Map");
michael@0: 
michael@0: var fn = 2;
michael@0: assertThrowsInstanceOf(function() {
michael@0:     initialMap.forEach(fn);
michael@0: }, TypeError, "Map.prototype.forEach should raise TypeError if callback is not a function");
michael@0: 
michael@0: // testing that Map#forEach uses internal next() function and does not stop when
michael@0: // StopIteration exception is thrown
michael@0: 
michael@0: var m = new Map([["one", 1]]);
michael@0: Object.getPrototypeOf(m[std_iterator]()).next = function () { throw "FAIL"; };
michael@0: assertThrowsInstanceOf(function () {
michael@0:   m.forEach(function () { throw StopIteration; });
michael@0: }, StopIteration, "Map.prototype.forEach should use intrinsic next method.");