feat: write some tests

tests/array/concat.js

@@ -0,0 +1,4 @@
+return new UnitTest('concat', function() { return typeof Array.prototype.concat === 'function'; })
+    .add('two arrays', function() { return match([1, 2, 3], [1].concat([2], [3])) })
+    .add('simple spread', function() { return match([1, 2, 3, 4, 5], [1].concat([2], 3, [4, 5])) })
+    .add('sparse concat', function() { return match([1,, 2,,, 3,,, 4, 5], [1,,2].concat([,,3,,,4], 5)) })

tests/array/index.js

@@ -0,0 +1,22 @@
+function runIterator(arr, method, func, n) {
+    var res = [];
+    var j = 1;
+    var args = [ function() {
+        var pushed = [];
+        for (var i = 0; i < n; i++) pushed[i] = arguments[i];
+        res[j++] = pushed;
+        return func.apply(this, arguments);
+    } ];
+
+    for (var i = 4; i < arguments.length; i++) args[i - 3] = arguments[i];
+
+    res[0] = method.apply(arr, args);
+
+    return res;
+}
+
+return new UnitTest('Array', function() { []; })
+    .add(include('length.js'))
+    .add(include('reduce.js'))
+    .add(include('sparse.js'))
+    .add(include('concat.js'))

tests/array/length.js

@@ -0,0 +1,26 @@
+return new UnitTest('length & capacity', function() { return 'length' in Array.prototype; })
+    .add('empty literal', function() { return [].length === 0 })
+    .add('filled literal', function() { return [1, 2, 3].length === 3 })
+    .add('set length', function() {
+        var a = [];
+        a.length = 10;
+        return a.length === 10;
+    })
+    .add('length after set', function() {
+        var a = [];
+        a [5]= 5;
+        return a.length === 6;
+    })
+    .add('length after set (big', function() {
+        var a = [1, 2];
+        a [5000]= 5;
+        return a.length === 5001;
+    })
+    .add('expand test', function() {
+        var a = [];
+        for (var i = 0; i < 1000; i++) {
+            a[i] = i * 50;
+            if (a[i] !== i * 50) return false;
+        }
+        return a.length === 1000;
+    })

tests/array/reduce.js

@@ -0,0 +1,44 @@
+var res = [];
+
+return new UnitTest('reduceRight', function () { return typeof Array.prototype.reduceRight === 'function' })
+    .add('empty function', function () {match(
+        [ undefined, [4, 3, 2], [undefined, 2, 1], [undefined, 1, 0], ],
+        runIterator([1, 2, 3, 4], Array.prototype.reduceRight, function() { }, 3), 1
+    )})
+    .add('adder', function () {match(
+        [ 10, [4, 3, 2], [7, 2, 1], [9, 1, 0], ],
+        runIterator([1, 2, 3, 4], Array.prototype.reduceRight, function(a, b) { return a + b; }, 3), 1
+    )})
+    .add('sparse array', function () {match(
+        [ 10, [4, 3, 11], [7, 2, 7], [9, 1, 3], ],
+        runIterator([,,,1,,,, 2,,,, 3,,,, 4,,,,], Array.prototype.reduceRight, function(a, b) { return a + b }, 3), 1
+    )})
+    .add('sparse array with one element', function () {match(
+        [ 1 ],
+        runIterator([,,,1,,,,], Array.prototype.reduceRight, function(v) { return v; }, 3), 1
+    )})
+    .add('sparse array with no elements', function () {match(
+        [ undefined ],
+        runIterator([,,,,,,,], Array.prototype.reduceRight, function(v) { return v; }, 3), 1
+    )})
+
+    .add('initial value and empty function', function () {match(
+        [ undefined, [0, 4, 3], [undefined, 3, 2], [undefined, 2, 1], [undefined, 1, 0] ],
+        runIterator([1, 2, 3, 4], Array.prototype.reduceRight, function() { }, 3, 0), 1
+    )})
+    .add('initial value and adder', function () {match(
+        [ 15, [5, 4, 3], [9, 3, 2], [12, 2, 1], [14, 1, 0] ],
+        runIterator([1, 2, 3, 4], Array.prototype.reduceRight, function(a, b) { return a + b; }, 3, 5), 1
+    )})
+    .add('initial value, sparce array and adder', function () {match(
+        [ 15, [5, 4, 15], [9, 3, 11], [12, 2, 7], [14, 1, 3] ],
+        runIterator([,,,1,,,, 2,,,, 3,,,, 4,,,,], Array.prototype.reduceRight, function(a, b) { return a + b; }, 3, 5), 1
+    )})
+    .add('initial value and sparse array with one element', function () {match(
+        [ 6, [5, 1, 3] ],
+        runIterator([,,,1,,,,], Array.prototype.reduceRight, function(a, b) { return a + b; }, 3, 5), 1
+    )})
+    .add('initial value and sparse array with no elements', function () {match(
+        [ 5 ],
+        runIterator([,,,,,,,], Array.prototype.reduceRight, function(v) { return v; }, 3, 5), 1
+    )});

tests/array/sort.js

@@ -0,0 +1,4 @@
+return new UnitTest('concat', function() { return typeof Array.prototype.concat === 'function'; })
+    .add('two arrays', function() { return match([1, 2, 3], [1].concat([2], [3])) })
+    .add('simple spread', function() { return match([1, 2, 3, 4, 5], [1].concat([2], 3, [4, 5])) })
+    .add('sparse concat', function() { return match([1,, 2,,, 3,,, 4, 5], [1,,2].concat([,,3,,,4], 5)) })

tests/array/sparse.js

@@ -0,0 +1,5 @@
+return new UnitTest('sparse', function() { return !(0 in [,,]) })
+    .add('empty in start', function() { var a = [,1]; return !(0 in a) && (1 in a); })
+    .add('empty in middle', function() { var a = [1,,2]; return !(1 in a) && (2 in a) && (0 in a); })
+    .add('empty in end', function() { var a = [1,,]; return !(1 in a) && (0 in a); })
+    .add('trailing comma', function() { var a = [1,]; return a.length === 1; })