Revert of Implement %TypedArray%.prototype.{reduce,reduceRight}

test/mjsunit/harmony/typedarray-reduce.js

-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --harmony-arrays
-
-var typedArrayConstructors = [
-  Uint8Array,
-  Int8Array,
-  Uint16Array,
-  Int16Array,
-  Uint32Array,
-  Int32Array,
-  Uint8ClampedArray,
-  Float32Array,
-  Float64Array
-];
-
-function clone(v) {
-  // Shallow-copies arrays, returns everything else verbatim.
-  if (v instanceof Array) {
-    // Shallow-copy an array.
-    var newArray = new Array(v.length);
-    for (var i in v) {
-      newArray[i] = v[i];
-    }
-    return newArray;
-  }
-  return v;
-}
-
-
-// Creates a callback function for reduce/reduceRight that tests the number
-// of arguments and otherwise behaves as "func", but which also
-// records all calls in an array on the function (as arrays of arguments
-// followed by result).
-function makeRecorder(func, testName) {
-  var record = [];
-  var f = function recorder(a, b, i, s) {
-    assertEquals(4, arguments.length,
-                 testName + "(number of arguments: " + arguments.length + ")");
-    assertEquals("number", typeof(i), testName + "(index must be number)");
-    assertEquals(s[i], b, testName + "(current argument is at index)");
-    if (record.length > 0) {
-      var prevRecord = record[record.length - 1];
-      var prevResult = prevRecord[prevRecord.length - 1];
-      assertEquals(prevResult, a,
-                   testName + "(prev result -> current input)");
-    }
-    var args = [clone(a), clone(b), i, clone(s)];
-    var result = func.apply(this, arguments);
-    args.push(clone(result));
-    record.push(args);
-    return result;
-  };
-  f.record = record;
-  return f;
-}
-
-
-function testReduce(type,
-                    testName,
-                    expectedResult,
-                    expectedCalls,
-                    array,
-                    combine,
-                    init) {
-  var rec = makeRecorder(combine);
-  var result;
-  var performsCall;
-  if (arguments.length > 6) {
-    result = array[type](rec, init);
-  } else {
-    result = array[type](rec);
-  }
-  var calls = rec.record;
-  assertEquals(expectedCalls.length, calls.length,
-               testName + " (number of calls)");
-  for (var i = 0; i < expectedCalls.length; i++) {
-    assertEquals(expectedCalls[i], calls[i],
-                 testName + " (call " + (i + 1) + ")");
-  }
-  assertEquals(expectedResult, result, testName + " (result)");
-}
-
-
-function sum(a, b) { return a + b; }
-function prod(a, b) { return a * b; }
-function dec(a, b, i, arr) { return a + b * Math.pow(10, arr.length - i - 1); }
-function accumulate(acc, elem, i) { acc[i] = elem; return acc; }
-
-for (var constructor of typedArrayConstructors) {
-  // ---- Test Reduce[Left]
-
-  var simpleArray = new constructor([2,4,6])
-
-  testReduce("reduce", "SimpleReduceSum", 12,
-             [[0, 2, 0, simpleArray, 2],
-              [2, 4, 1, simpleArray, 6],
-              [6, 6, 2, simpleArray, 12]],
-             simpleArray, sum, 0);
-
-  testReduce("reduce", "SimpleReduceProd", 48,
-             [[1, 2, 0, simpleArray, 2],
-              [2, 4, 1, simpleArray, 8],
-              [8, 6, 2, simpleArray, 48]],
-             simpleArray, prod, 1);
-
-  testReduce("reduce", "SimpleReduceDec", 246,
-             [[0, 2, 0, simpleArray, 200],
-              [200, 4, 1, simpleArray, 240],
-              [240, 6, 2, simpleArray, 246]],
-             simpleArray, dec, 0);
-
-  testReduce("reduce", "SimpleReduceAccumulate", [2, 4, 6],
-             [[[], 2, 0, simpleArray, [2]],
-              [[2], 4, 1, simpleArray, [2, 4]],
-              [[2,4], 6, 2, simpleArray, [2, 4, 6]]],
-             simpleArray, accumulate, []);
-
-
-  testReduce("reduce", "EmptyReduceSum", 0, [], [], sum, 0);
-  testReduce("reduce", "EmptyReduceProd", 1, [], [], prod, 1);
-  testReduce("reduce", "EmptyReduceDec", 0, [], [], dec, 0);
-  testReduce("reduce", "EmptyReduceAccumulate", [], [], [], accumulate, []);
-
-  testReduce("reduce", "EmptyReduceSumNoInit", 0, [], [0], sum);
-  testReduce("reduce", "EmptyReduceProdNoInit", 1, [], [1], prod);
-  testReduce("reduce", "EmptyReduceDecNoInit", 0, [], [0], dec);
-  testReduce("reduce", "EmptyReduceAccumulateNoInit", [], [], [[]], accumulate);
-
-  // ---- Test ReduceRight
-
-  testReduce("reduceRight", "SimpleReduceRightSum", 12,
-             [[0, 6, 2, simpleArray, 6],
-              [6, 4, 1, simpleArray, 10],
-              [10, 2, 0, simpleArray, 12]],
-             simpleArray, sum, 0);
-
-  testReduce("reduceRight", "SimpleReduceRightProd", 48,
-             [[1, 6, 2, simpleArray, 6],
-              [6, 4, 1, simpleArray, 24],
-              [24, 2, 0, simpleArray, 48]],
-             simpleArray, prod, 1);
-
-  testReduce("reduceRight", "SimpleReduceRightDec", 246,
-             [[0, 6, 2, simpleArray, 6],
-              [6, 4, 1, simpleArray, 46],
-              [46, 2, 0, simpleArray, 246]],
-             simpleArray, dec, 0);
-
-
-  testReduce("reduceRight", "EmptyReduceRightSum", 0, [], [], sum, 0);
-  testReduce("reduceRight", "EmptyReduceRightProd", 1, [], [], prod, 1);
-  testReduce("reduceRight", "EmptyReduceRightDec", 0, [], [], dec, 0);
-  testReduce("reduceRight", "EmptyReduceRightAccumulate", [],
-             [], [], accumulate, []);
-
-  testReduce("reduceRight", "EmptyReduceRightSumNoInit", 0, [], [0], sum);
-  testReduce("reduceRight", "EmptyReduceRightProdNoInit", 1, [], [1], prod);
-  testReduce("reduceRight", "EmptyReduceRightDecNoInit", 0, [], [0], dec);
-  testReduce("reduceRight", "EmptyReduceRightAccumulateNoInit",
-             [], [], [[]], accumulate);
-
-  // Ignore non-array properties:
-
-  var arrayPlus = [1,2,3];
-  arrayPlus[-1] = NaN;
-  arrayPlus[Math.pow(2,32)] = NaN;
-  arrayPlus[NaN] = NaN;
-  arrayPlus["00"] = NaN;
-  arrayPlus["02"] = NaN;
-  arrayPlus["-0"] = NaN;
-
-  testReduce("reduce", "ArrayWithNonElementPropertiesReduce", 6,
-             [[0, 1, 0, arrayPlus, 1],
-              [1, 2, 1, arrayPlus, 3],
-              [3, 3, 2, arrayPlus, 6],
-             ], arrayPlus, sum, 0);
-
-  testReduce("reduceRight", "ArrayWithNonElementPropertiesReduceRight", 6,
-             [[0, 3, 2, arrayPlus, 3],
-              [3, 2, 1, arrayPlus, 5],
-              [5, 1, 0, arrayPlus, 6],
-             ], arrayPlus, sum, 0);
-
-
-  // Test error conditions:
-
-  var exception = false;
-  try {
-    new constructor([1]).reduce("not a function");
-  } catch (e) {
-    exception = true;
-    assertTrue(e instanceof TypeError,
-               "reduce callback not a function not throwing TypeError");
-    assertTrue(e.message.indexOf(" is not a function") >= 0,
-               "reduce non function TypeError type");
-  }
-  assertTrue(exception);
-
-  exception = false;
-  try {
-    new constructor([1]).reduceRight("not a function");
-  } catch (e) {
-    exception = true;
-    assertTrue(e instanceof TypeError,
-               "reduceRight callback not a function not throwing TypeError");
-    assertTrue(e.message.indexOf(" is not a function") >= 0,
-               "reduceRight non function TypeError type");
-  }
-  assertTrue(exception);
-
-  exception = false;
-  try {
-    new constructor([]).reduce(sum);
-  } catch (e) {
-    exception = true;
-    assertTrue(e instanceof TypeError,
-               "reduce 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 {
-    new constructor([]).reduceRight(sum);
-  } catch (e) {
-    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);
-
-  // Reduce fails when called on non-TypedArrays
-  assertThrows(function() {
-    constructor.prototype.reduce.call([], function() {}, null);
-  }, TypeError);
-  assertThrows(function() {
-    constructor.prototype.reduceRight.call([], function() {}, null);
-  }, TypeError);
-
-  // Shadowing length doesn't affect every, unlike Array.prototype.every
-  var a = new constructor([1, 2]);
-  Object.defineProperty(a, 'length', {value: 1});
-  assertEquals(a.reduce(sum, 0), 3);
-  assertEquals(Array.prototype.reduce.call(a, sum, 0), 1);
-  assertEquals(a.reduceRight(sum, 0), 3);
-  assertEquals(Array.prototype.reduceRight.call(a, sum, 0), 1);
-
-  assertEquals(1, constructor.prototype.reduce.length);
-  assertEquals(1, constructor.prototype.reduceRight.length);
-}