Migrated several tests from blink to V8 repository.

test/webkit/array-enumerators-functions.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+description(
+"This test checks the behavior of the various array enumeration functions in certain edge case scenarios"
+);
+
+var functions = ["every", "forEach", "some", "filter", "reduce", "map", "reduceRight"];
+var forwarders = [
+    function(elem, index, array) { return currentFunc.call(this, elem, index, array); },
+    function(elem, index, array) { return currentFunc.call(this, elem, index, array); },
+    function(elem, index, array) { return currentFunc.call(this, elem, index, array); },
+    function(elem, index, array) { return currentFunc.call(this, elem, index, array); },
+    function(prev, elem, index, array) { return currentFunc.call(this, elem, index, array); },
+    function(elem, index, array) { return currentFunc.call(this, elem, index, array); },
+    function(prev, elem, index, array) { return currentFunc.call(this, elem, index, array); }
+];
+
+function toObject(array) {
+    var o = {};
+    for (var i in array)
+        o[i] = array[i];
+    o.length = array.length;
+    return o;
+}
+function toUnorderedObject(array) {
+    var o = {};
+    var props = [];
+    for (var i in array)
+        props.push(i);
+    for (var i = props.length - 1; i >= 0; i--)
+        o[props[i]] = array[props[i]];
+    o.length = array.length;
+    return o;
+}
+function returnFalse() { count++; return false; }
+function returnTrue() { count++; return true; }
+function returnElem(elem) { count++; return elem; }
+function returnIndex(a, index) { if (lastIndex >= index) throw "Unordered traversal"; lastIndex = index; count++; return index; }
+function increaseLength(a, b, array) { count++; array.length++; }
+function decreaseLength(a, b, array) { count++; array.length--; }
+function halveLength(a, b, array) { count++; if (!array.halved) array.length = (array.length / 2) | 0; array.halved = true; }
+
+var testFunctions = ["returnFalse", "returnTrue", "returnElem", "returnIndex", "increaseLength", "decreaseLength", "halveLength"];
+
+var simpleArray = [0,1,2,3,4,5];
+var emptyArray = [];
+var largeEmptyArray = new Array(300);
+var largeSparseArray = [0,1,2,3,4,5];
+largeSparseArray[299] = 299;
+
+var arrays = ["simpleArray", "emptyArray", "largeEmptyArray", "largeSparseArray"];
+function copyArray(a) {
+    var g = [];
+    for (var i in a)
+        g[i] = a[i];
+    return g;
+}
+
+// Test object and array behaviour matches
+for (var f = 0; f < functions.length; f++) {
+    for (var t = 0; t < testFunctions.length; t++) {
+        for (var a = 0; a < arrays.length; a++) {
+            var functionName = functions[f];
+            currentFunc = this[testFunctions[t]];
+            if (arrays[a] === "largeEmptyArray" && functionName === "map")
+                continue;
+            if (currentFunc === returnIndex && functionName === "reduceRight")
+                continue;
+            shouldBe("count=0;lastIndex=-1;copyArray("+arrays[a]+")."+functionName+"(forwarders[f], "+testFunctions[t]+", 0)",
+                     "count=0;lastIndex=-1;Array.prototype."+functionName+".call(toObject("+arrays[a]+"), forwarders[f], "+testFunctions[t]+", 0)");
+        }
+    }
+}
+
+// Test unordered object and array behaviour matches
+for (var f = 0; f < functions.length; f++) {
+    for (var t = 0; t < testFunctions.length; t++) {
+        for (var a = 0; a < arrays.length; a++) {
+            var functionName = functions[f];
+            currentFunc = this[testFunctions[t]];
+            if (arrays[a] === "largeEmptyArray" && functionName === "map")
+                continue;
+            if (currentFunc === returnIndex && functionName === "reduceRight")
+                continue;
+            shouldBe("count=0;lastIndex=-1;copyArray("+arrays[a]+")."+functionName+"(forwarders[f], "+testFunctions[t]+", 0)",
+                     "count=0;lastIndex=-1;Array.prototype."+functionName+".call(toUnorderedObject("+arrays[a]+"), forwarders[f], "+testFunctions[t]+", 0)");
+        }
+    }
+}
+
+// Test number of function calls
+var callCounts = [
+[[1,0,0,1],[6,0,0,7],[1,0,0,1],[1,0,0,1],[1,0,0,1],[1,0,0,1],[1,0,0,1]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[3,0,0,6],[3,0,0,6]],
+[[6,0,0,7],[1,0,0,1],[2,0,0,2],[2,0,0,2],[6,0,0,7],[3,0,0,6],[3,0,0,6]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[3,0,0,6],[3,0,0,6]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[3,0,0,6],[3,0,0,6]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[3,0,0,6],[3,0,0,6]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[4,0,0,7]]
+];
+var objCallCounts = [
+[[1,0,0,1],[6,0,0,7],[1,0,0,1],[1,0,0,1],[1,0,0,1],[1,0,0,1],[1,0,0,1]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7]],
+[[6,0,0,7],[1,0,0,1],[2,0,0,2],[2,0,0,2],[6,0,0,7],[6,0,0,7],[6,0,0,7]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7]],
+[[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7],[6,0,0,7]]
+];
+for (var f = 0; f < functions.length; f++) {
+    for (var t = 0; t < testFunctions.length; t++) {
+        for (var a = 0; a < arrays.length; a++) {
+            var functionName = functions[f];
+            currentFunc = this[testFunctions[t]];
+            if (currentFunc === returnIndex && functionName === "reduceRight")
+                continue;
+            var expectedCnt = "" + callCounts[f][t][a];
+            shouldBe("count=0;lastIndex=-1;copyArray("+arrays[a]+")."+functionName+"(forwarders[f], "+testFunctions[t]+", 0); count", expectedCnt);
+            var expectedCnt = "" + objCallCounts[f][t][a];
+            shouldBe("count=0;lastIndex=-1;Array.prototype."+functionName+".call(toObject("+arrays[a]+"), forwarders[f], "+testFunctions[t]+", 0); count", expectedCnt);
+            shouldBe("count=0;lastIndex=-1;Array.prototype."+functionName+".call(toObject("+arrays[a]+"), forwarders[f], "+testFunctions[t]+", 0); count", expectedCnt);
+        }
+    }
+}