michael@0: 
michael@0: var emptyArray = [];
michael@0: var denseArray = [1, 2, 3, 4];
michael@0: var sparseArray = [1,,2,,3,,4];
michael@0: var bigArray = new Array();
michael@0: for (var i = 0; i < 128; i++) {
michael@0:     bigArray.push(i);
michael@0: }
michael@0: var nonArray = {0:1, 1:2, 2:3, 3:4, length:2};
michael@0: var indexedGetterArray = new Array();
michael@0: Object.defineProperty(indexedGetterArray, '2', {get:function () { return 51; }});
michael@0: 
michael@0: var ARRAYS = [emptyArray, denseArray, sparseArray, bigArray, nonArray, indexedGetterArray];
michael@0: 
michael@0: var targetFun = function (a, b, c, d) {
michael@0:     if (a === undefined)
michael@0:         a = 0;
michael@0:     if (b === undefined)
michael@0:         b = 0;
michael@0:     if (c === undefined)
michael@0:         c = 0;
michael@0:     if (d === undefined)
michael@0:         d = 0;
michael@0:     this.count += arguments.length + a + b + c + d;
michael@0: }
michael@0: 
michael@0: var PERMUTATIONS = ARRAYS.length * ARRAYS.length;
michael@0: function arrayPermutation(num) {
michael@0:     var idx1 = num % ARRAYS.length;
michael@0:     var idx2 = ((num / ARRAYS.length)|0) % ARRAYS.length;
michael@0:     var resultArray = [];
michael@0:     resultArray.push(ARRAYS[idx1]);
michael@0:     resultArray.push(ARRAYS[idx2]);
michael@0:     return resultArray;
michael@0: }
michael@0: var EXPECTED_RESULTS = {
michael@0:     0:0, 1:280, 2:200, 3:2680, 4:100, 5:1080, 6:280, 7:560, 8:480, 9:2960,
michael@0:     10:380, 11:1360, 12:200, 13:480, 14:400, 15:2880, 16:300, 17:1280, 18:2680,
michael@0:     19:2960, 20:2880, 21:5360, 22:2780, 23:3760, 24:100, 25:380, 26:300, 27:2780,
michael@0:     28:200, 29:1180, 30:1080, 31:1360, 32:1280, 33:3760, 34:1180, 35:2160
michael@0: };
michael@0: 
michael@0: var callerNo = 0;
michael@0: function generateCaller() {
michael@0:     var fn;
michael@0: 
michael@0:     // Salt eval-string with callerNo to make sure eval caching doesn't take effect.
michael@0:     var s = "function caller" + callerNo + "(fn, thisObj, arrays) {" +
michael@0:             "  for (var i = 0; i < arrays.length; i++) {" +
michael@0:             "    fn.apply(thisObj, arrays[i]);" +
michael@0:             "  }" +
michael@0:             "}" +
michael@0:             "fn = caller" + callerNo + ";";
michael@0:     eval(s);
michael@0:     return fn;
michael@0: };
michael@0: 
michael@0: function main() {
michael@0:     for (var i = 0; i < PERMUTATIONS; i++) {
michael@0:         var obj = {count:0};
michael@0:         var arrs = arrayPermutation(i);
michael@0:         var fn = generateCaller(arrs.length);
michael@0:         // Loop 20 times so baseline compiler has chance to kick in and compile the scripts.
michael@0:         for (var j = 0; j < 20; j++)
michael@0:             fn(targetFun, obj, arrs);
michael@0:         assertEq(obj.count, EXPECTED_RESULTS[i]);
michael@0:     }
michael@0: }
michael@0: 
michael@0: main();