176a43fb86
BUG=v8:1956 Review-Url: https://codereview.chromium.org/2752273003 Cr-Commit-Position: refs/heads/master@{#43987}
540 lines
19 KiB
JavaScript
540 lines
19 KiB
JavaScript
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/**
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* @fileoverview Test reduce and reduceRight
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*/
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function clone(v) {
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// Shallow-copies arrays, returns everything else verbatim.
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if (v instanceof Array) {
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// Shallow-copy an array.
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var newArray = new Array(v.length);
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for (var i in v) {
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newArray[i] = v[i];
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}
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return newArray;
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}
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return v;
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}
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// Creates a callback function for reduce/reduceRight that tests the number
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// of arguments and otherwise behaves as "func", but which also
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// records all calls in an array on the function (as arrays of arguments
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// followed by result).
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function makeRecorder(func, testName) {
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var record = [];
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var f = function recorder(a, b, i, s) {
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assertEquals(4, arguments.length,
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testName + "(number of arguments: " + arguments.length + ")");
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assertEquals("number", typeof(i), testName + "(index must be number)");
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assertEquals(s[i], b, testName + "(current argument is at index)");
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if (record.length > 0) {
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var prevRecord = record[record.length - 1];
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var prevResult = prevRecord[prevRecord.length - 1];
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assertEquals(prevResult, a,
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testName + "(prev result -> current input)");
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}
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var args = [clone(a), clone(b), i, clone(s)];
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var result = func.apply(this, arguments);
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args.push(clone(result));
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record.push(args);
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return result;
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};
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f.record = record;
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return f;
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}
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function testReduce(type,
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testName,
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expectedResult,
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expectedCalls,
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array,
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combine,
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init) {
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var rec = makeRecorder(combine);
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var result;
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var performsCall;
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if (arguments.length > 6) {
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result = array[type](rec, init);
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} else {
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result = array[type](rec);
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}
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var calls = rec.record;
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assertEquals(expectedCalls.length, calls.length,
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testName + " (number of calls)");
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for (var i = 0; i < expectedCalls.length; i++) {
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assertEquals(expectedCalls[i], calls[i],
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testName + " (call " + (i + 1) + ")");
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}
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assertEquals(expectedResult, result, testName + " (result)");
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}
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function sum(a, b) { return a + b; }
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function prod(a, b) { return a * b; }
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function dec(a, b, i, arr) { return a + b * Math.pow(10, arr.length - i - 1); }
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function accumulate(acc, elem, i) { acc[i] = elem; return acc; }
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// ---- Test Reduce[Left]
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var simpleArray = [2,4,6]
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testReduce("reduce", "SimpleReduceSum", 12,
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[[0, 2, 0, simpleArray, 2],
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[2, 4, 1, simpleArray, 6],
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[6, 6, 2, simpleArray, 12]],
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simpleArray, sum, 0);
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testReduce("reduce", "SimpleReduceProd", 48,
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[[1, 2, 0, simpleArray, 2],
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[2, 4, 1, simpleArray, 8],
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[8, 6, 2, simpleArray, 48]],
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simpleArray, prod, 1);
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testReduce("reduce", "SimpleReduceDec", 246,
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[[0, 2, 0, simpleArray, 200],
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[200, 4, 1, simpleArray, 240],
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[240, 6, 2, simpleArray, 246]],
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simpleArray, dec, 0);
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testReduce("reduce", "SimpleReduceAccumulate", simpleArray,
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[[[], 2, 0, simpleArray, [2]],
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[[2], 4, 1, simpleArray, [2, 4]],
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[[2,4], 6, 2, simpleArray, simpleArray]],
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simpleArray, accumulate, []);
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testReduce("reduce", "EmptyReduceSum", 0, [], [], sum, 0);
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testReduce("reduce", "EmptyReduceProd", 1, [], [], prod, 1);
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testReduce("reduce", "EmptyReduceDec", 0, [], [], dec, 0);
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testReduce("reduce", "EmptyReduceAccumulate", [], [], [], accumulate, []);
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testReduce("reduce", "EmptyReduceSumNoInit", 0, [], [0], sum);
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testReduce("reduce", "EmptyReduceProdNoInit", 1, [], [1], prod);
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testReduce("reduce", "EmptyReduceDecNoInit", 0, [], [0], dec);
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testReduce("reduce", "EmptyReduceAccumulateNoInit", [], [], [[]], accumulate);
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var simpleSparseArray = [,,,2,,4,,6,,];
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testReduce("reduce", "SimpleSparseReduceSum", 12,
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[[0, 2, 3, simpleSparseArray, 2],
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[2, 4, 5, simpleSparseArray, 6],
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[6, 6, 7, simpleSparseArray, 12]],
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simpleSparseArray, sum, 0);
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testReduce("reduce", "SimpleSparseReduceProd", 48,
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[[1, 2, 3, simpleSparseArray, 2],
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[2, 4, 5, simpleSparseArray, 8],
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[8, 6, 7, simpleSparseArray, 48]],
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simpleSparseArray, prod, 1);
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testReduce("reduce", "SimpleSparseReduceDec", 204060,
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[[0, 2, 3, simpleSparseArray, 200000],
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[200000, 4, 5, simpleSparseArray, 204000],
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[204000, 6, 7, simpleSparseArray, 204060]],
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simpleSparseArray, dec, 0);
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testReduce("reduce", "SimpleSparseReduceAccumulate", [,,,2,,4,,6],
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[[[], 2, 3, simpleSparseArray, [,,,2]],
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[[,,,2], 4, 5, simpleSparseArray, [,,,2,,4]],
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[[,,,2,,4], 6, 7, simpleSparseArray, [,,,2,,4,,6]]],
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simpleSparseArray, accumulate, []);
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testReduce("reduce", "EmptySparseReduceSumNoInit", 0, [], [,,0,,], sum);
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testReduce("reduce", "EmptySparseReduceProdNoInit", 1, [], [,,1,,], prod);
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testReduce("reduce", "EmptySparseReduceDecNoInit", 0, [], [,,0,,], dec);
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testReduce("reduce", "EmptySparseReduceAccumulateNoInit",
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[], [], [,,[],,], accumulate);
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var verySparseArray = [];
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verySparseArray.length = 10000;
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verySparseArray[2000] = 2;
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verySparseArray[5000] = 4;
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verySparseArray[9000] = 6;
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var verySparseSlice2 = verySparseArray.slice(0, 2001);
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var verySparseSlice4 = verySparseArray.slice(0, 5001);
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var verySparseSlice6 = verySparseArray.slice(0, 9001);
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testReduce("reduce", "VerySparseReduceSum", 12,
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[[0, 2, 2000, verySparseArray, 2],
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[2, 4, 5000, verySparseArray, 6],
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[6, 6, 9000, verySparseArray, 12]],
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verySparseArray, sum, 0);
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testReduce("reduce", "VerySparseReduceProd", 48,
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[[1, 2, 2000, verySparseArray, 2],
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[2, 4, 5000, verySparseArray, 8],
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[8, 6, 9000, verySparseArray, 48]],
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verySparseArray, prod, 1);
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testReduce("reduce", "VerySparseReduceDec", Infinity,
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[[0, 2, 2000, verySparseArray, Infinity],
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[Infinity, 4, 5000, verySparseArray, Infinity],
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[Infinity, 6, 9000, verySparseArray, Infinity]],
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verySparseArray, dec, 0);
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testReduce("reduce", "VerySparseReduceAccumulate",
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verySparseSlice6,
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[[[], 2, 2000, verySparseArray, verySparseSlice2],
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[verySparseSlice2, 4, 5000, verySparseArray, verySparseSlice4],
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[verySparseSlice4, 6, 9000, verySparseArray, verySparseSlice6]],
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verySparseArray, accumulate, []);
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testReduce("reduce", "VerySparseReduceSumNoInit", 12,
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[[2, 4, 5000, verySparseArray, 6],
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[6, 6, 9000, verySparseArray, 12]],
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verySparseArray, sum);
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testReduce("reduce", "VerySparseReduceProdNoInit", 48,
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[[2, 4, 5000, verySparseArray, 8],
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[8, 6, 9000, verySparseArray, 48]],
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verySparseArray, prod);
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testReduce("reduce", "VerySparseReduceDecNoInit", Infinity,
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[[2, 4, 5000, verySparseArray, Infinity],
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[Infinity, 6, 9000, verySparseArray, Infinity]],
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verySparseArray, dec);
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testReduce("reduce", "SimpleSparseReduceAccumulateNoInit",
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2,
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[[2, 4, 5000, verySparseArray, 2],
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[2, 6, 9000, verySparseArray, 2]],
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verySparseArray, accumulate);
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// ---- Test ReduceRight
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testReduce("reduceRight", "SimpleReduceRightSum", 12,
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[[0, 6, 2, simpleArray, 6],
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[6, 4, 1, simpleArray, 10],
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[10, 2, 0, simpleArray, 12]],
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simpleArray, sum, 0);
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testReduce("reduceRight", "SimpleReduceRightProd", 48,
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[[1, 6, 2, simpleArray, 6],
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[6, 4, 1, simpleArray, 24],
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[24, 2, 0, simpleArray, 48]],
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simpleArray, prod, 1);
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testReduce("reduceRight", "SimpleReduceRightDec", 246,
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[[0, 6, 2, simpleArray, 6],
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[6, 4, 1, simpleArray, 46],
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[46, 2, 0, simpleArray, 246]],
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simpleArray, dec, 0);
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testReduce("reduceRight", "SimpleReduceRightAccumulate", simpleArray,
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[[[], 6, 2, simpleArray, [,,6]],
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[[,,6], 4, 1, simpleArray, [,4,6]],
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[[,4,6], 2, 0, simpleArray, simpleArray]],
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simpleArray, accumulate, []);
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testReduce("reduceRight", "EmptyReduceRightSum", 0, [], [], sum, 0);
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testReduce("reduceRight", "EmptyReduceRightProd", 1, [], [], prod, 1);
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testReduce("reduceRight", "EmptyReduceRightDec", 0, [], [], dec, 0);
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testReduce("reduceRight", "EmptyReduceRightAccumulate", [],
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[], [], accumulate, []);
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testReduce("reduceRight", "EmptyReduceRightSumNoInit", 0, [], [0], sum);
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testReduce("reduceRight", "EmptyReduceRightProdNoInit", 1, [], [1], prod);
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testReduce("reduceRight", "EmptyReduceRightDecNoInit", 0, [], [0], dec);
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testReduce("reduceRight", "EmptyReduceRightAccumulateNoInit",
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[], [], [[]], accumulate);
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testReduce("reduceRight", "SimpleSparseReduceRightSum", 12,
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[[0, 6, 7, simpleSparseArray, 6],
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[6, 4, 5, simpleSparseArray, 10],
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[10, 2, 3, simpleSparseArray, 12]],
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simpleSparseArray, sum, 0);
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testReduce("reduceRight", "SimpleSparseReduceRightProd", 48,
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[[1, 6, 7, simpleSparseArray, 6],
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[6, 4, 5, simpleSparseArray, 24],
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[24, 2, 3, simpleSparseArray, 48]],
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simpleSparseArray, prod, 1);
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testReduce("reduceRight", "SimpleSparseReduceRightDec", 204060,
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[[0, 6, 7, simpleSparseArray, 60],
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[60, 4, 5, simpleSparseArray, 4060],
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[4060, 2, 3, simpleSparseArray, 204060]],
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simpleSparseArray, dec, 0);
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testReduce("reduceRight", "SimpleSparseReduceRightAccumulate", [,,,2,,4,,6],
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[[[], 6, 7, simpleSparseArray, [,,,,,,,6]],
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[[,,,,,,,6], 4, 5, simpleSparseArray, [,,,,,4,,6]],
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[[,,,,,4,,6], 2, 3, simpleSparseArray, [,,,2,,4,,6]]],
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simpleSparseArray, accumulate, []);
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testReduce("reduceRight", "EmptySparseReduceRightSumNoInit",
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0, [], [,,0,,], sum);
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testReduce("reduceRight", "EmptySparseReduceRightProdNoInit",
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1, [], [,,1,,], prod);
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testReduce("reduceRight", "EmptySparseReduceRightDecNoInit",
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0, [], [,,0,,], dec);
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testReduce("reduceRight", "EmptySparseReduceRightAccumulateNoInit",
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[], [], [,,[],,], accumulate);
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var verySparseSuffix6 = [];
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verySparseSuffix6[9000] = 6;
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var verySparseSuffix4 = [];
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verySparseSuffix4[5000] = 4;
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verySparseSuffix4[9000] = 6;
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var verySparseSuffix2 = verySparseSlice6;
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testReduce("reduceRight", "VerySparseReduceRightSum", 12,
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[[0, 6, 9000, verySparseArray, 6],
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[6, 4, 5000, verySparseArray, 10],
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[10, 2, 2000, verySparseArray, 12]],
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verySparseArray, sum, 0);
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testReduce("reduceRight", "VerySparseReduceRightProd", 48,
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[[1, 6, 9000, verySparseArray, 6],
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[6, 4, 5000, verySparseArray, 24],
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[24, 2, 2000, verySparseArray, 48]],
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verySparseArray, prod, 1);
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testReduce("reduceRight", "VerySparseReduceRightDec", Infinity,
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[[0, 6, 9000, verySparseArray, Infinity],
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[Infinity, 4, 5000, verySparseArray, Infinity],
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[Infinity, 2, 2000, verySparseArray, Infinity]],
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verySparseArray, dec, 0);
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testReduce("reduceRight", "VerySparseReduceRightAccumulate",
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verySparseSuffix2,
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[[[], 6, 9000, verySparseArray, verySparseSuffix6],
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[verySparseSuffix6, 4, 5000, verySparseArray, verySparseSuffix4],
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[verySparseSuffix4, 2, 2000, verySparseArray, verySparseSuffix2]],
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verySparseArray, accumulate, []);
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testReduce("reduceRight", "VerySparseReduceRightSumNoInit", 12,
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[[6, 4, 5000, verySparseArray, 10],
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[10, 2, 2000, verySparseArray, 12]],
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verySparseArray, sum);
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testReduce("reduceRight", "VerySparseReduceRightProdNoInit", 48,
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[[6, 4, 5000, verySparseArray, 24],
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[24, 2, 2000, verySparseArray, 48]],
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verySparseArray, prod);
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testReduce("reduceRight", "VerySparseReduceRightDecNoInit", Infinity,
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[[6, 4, 5000, verySparseArray, Infinity],
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[Infinity, 2, 2000, verySparseArray, Infinity]],
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verySparseArray, dec);
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testReduce("reduceRight", "SimpleSparseReduceRightAccumulateNoInit",
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6,
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[[6, 4, 5000, verySparseArray, 6],
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[6, 2, 2000, verySparseArray, 6]],
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verySparseArray, accumulate);
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// undefined is an element
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var undefArray = [,,undefined,,undefined,,];
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testReduce("reduce", "SparseUndefinedReduceAdd", NaN,
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[[0, undefined, 2, undefArray, NaN],
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[NaN, undefined, 4, undefArray, NaN],
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],
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undefArray, sum, 0);
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testReduce("reduceRight", "SparseUndefinedReduceRightAdd", NaN,
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[[0, undefined, 4, undefArray, NaN],
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[NaN, undefined, 2, undefArray, NaN],
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], undefArray, sum, 0);
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testReduce("reduce", "SparseUndefinedReduceAddNoInit", NaN,
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[[undefined, undefined, 4, undefArray, NaN],
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], undefArray, sum);
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testReduce("reduceRight", "SparseUndefinedReduceRightAddNoInit", NaN,
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[[undefined, undefined, 2, undefArray, NaN],
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], undefArray, sum);
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// Ignore non-array properties:
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var arrayPlus = [1,2,,3];
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arrayPlus[-1] = NaN;
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arrayPlus[Math.pow(2,32)] = NaN;
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arrayPlus[NaN] = NaN;
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arrayPlus["00"] = NaN;
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arrayPlus["02"] = NaN;
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arrayPlus["-0"] = NaN;
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testReduce("reduce", "ArrayWithNonElementPropertiesReduce", 6,
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[[0, 1, 0, arrayPlus, 1],
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[1, 2, 1, arrayPlus, 3],
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[3, 3, 3, arrayPlus, 6],
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], arrayPlus, sum, 0);
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testReduce("reduceRight", "ArrayWithNonElementPropertiesReduceRight", 6,
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[[0, 3, 3, arrayPlus, 3],
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[3, 2, 1, arrayPlus, 5],
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[5, 1, 0, arrayPlus, 6],
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], arrayPlus, sum, 0);
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// Test passing undefined as initial value (to test missing parameter
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// detection).
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[1].reduce((a, b) => { assertEquals(a, undefined); assertEquals(b, 1) },
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undefined);
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[1, 2].reduce((a, b) => { assertEquals(a, 1); assertEquals(b, 2); });
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[1].reduce((a, b) => { assertTrue(false); });
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// Test error conditions:
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var exception = false;
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try {
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[1].reduce("not a function");
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} catch (e) {
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exception = true;
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assertTrue(e instanceof TypeError,
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"reduce callback not a function not throwing TypeError");
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assertTrue(e.message.indexOf(" is not a function") >= 0,
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"reduce non function TypeError type");
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}
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assertTrue(exception);
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exception = false;
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try {
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[1].reduceRight("not a function");
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} catch (e) {
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exception = true;
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assertTrue(e instanceof TypeError,
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"reduceRight callback not a function not throwing TypeError");
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assertTrue(e.message.indexOf(" is not a function") >= 0,
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"reduceRight non function TypeError type");
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}
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assertTrue(exception);
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exception = false;
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try {
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[].reduce(sum);
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} catch (e) {
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exception = true;
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assertTrue(e instanceof TypeError,
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"reduce no initial value not throwing TypeError");
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assertEquals("Reduce of empty array with no initial value", e.message,
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"reduce no initial TypeError type");
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}
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assertTrue(exception);
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exception = false;
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try {
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[].reduceRight(sum);
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} catch (e) {
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exception = true;
|
|
assertTrue(e instanceof TypeError,
|
|
"reduceRight no initial value not throwing TypeError");
|
|
assertEquals("Reduce of empty array with no initial value", e.message,
|
|
"reduceRight no initial TypeError type");
|
|
}
|
|
assertTrue(exception);
|
|
|
|
exception = false;
|
|
try {
|
|
[,,,].reduce(sum);
|
|
} catch (e) {
|
|
exception = true;
|
|
assertTrue(e instanceof TypeError,
|
|
"reduce sparse no initial value not throwing TypeError");
|
|
assertEquals("Reduce of empty array with no initial value", e.message,
|
|
"reduce no initial TypeError type");
|
|
}
|
|
assertTrue(exception);
|
|
|
|
exception = false;
|
|
try {
|
|
[,,,].reduceRight(sum);
|
|
} catch (e) {
|
|
exception = true;
|
|
assertTrue(e instanceof TypeError,
|
|
"reduceRight sparse no initial value not throwing TypeError");
|
|
assertEquals("Reduce of empty array with no initial value", e.message,
|
|
"reduceRight no initial TypeError type");
|
|
}
|
|
assertTrue(exception);
|
|
|
|
|
|
// Array changing length
|
|
|
|
function manipulator(a, b, i, s) {
|
|
if (s.length % 2) {
|
|
s[s.length * 3] = i;
|
|
} else {
|
|
s.length = s.length >> 1;
|
|
}
|
|
return a + b;
|
|
}
|
|
|
|
var arr = [1, 2, 3, 4];
|
|
testReduce("reduce", "ArrayManipulationShort", 3,
|
|
[[0, 1, 0, [1, 2, 3, 4], 1],
|
|
[1, 2, 1, [1, 2], 3],
|
|
], arr, manipulator, 0);
|
|
|
|
var arr = [1, 2, 3, 4, 5];
|
|
testReduce("reduce", "ArrayManipulationLonger", 10,
|
|
[[0, 1, 0, [1, 2, 3, 4, 5], 1],
|
|
[1, 2, 1, [1, 2, 3, 4, 5,,,,,,,,,,, 0], 3],
|
|
[3, 3, 2, [1, 2, 3, 4, 5,,,,], 6],
|
|
[6, 4, 3, [1, 2, 3, 4], 10],
|
|
], arr, manipulator, 0);
|
|
|
|
function extender(a, b, i, s) {
|
|
s[s.length] = s.length;
|
|
return a + b;
|
|
}
|
|
|
|
var arr = [1, 2, 3, 4];
|
|
testReduce("reduce", "ArrayManipulationExtender", 10,
|
|
[[0, 1, 0, [1, 2, 3, 4], 1],
|
|
[1, 2, 1, [1, 2, 3, 4, 4], 3],
|
|
[3, 3, 2, [1, 2, 3, 4, 4, 5], 6],
|
|
[6, 4, 3, [1, 2, 3, 4, 4, 5, 6], 10],
|
|
], arr, extender, 0);
|
|
|
|
var arr = [];
|
|
Object.defineProperty(arr, "0", { get: function() { delete this[0] },
|
|
configurable: true });
|
|
assertEquals(undefined, arr.reduce(function(val) { return val }));
|
|
|
|
var arr = [];
|
|
Object.defineProperty(arr, "0", { get: function() { delete this[0] },
|
|
configurable: true});
|
|
assertEquals(undefined, arr.reduceRight(function(val) { return val }));
|