// Copyright 2016 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. // This is intended for permanent JS behavior changes for mocking out // non-deterministic behavior. For temporary suppressions, please refer to // v8_suppressions.js. // This file is loaded before each correctness test cases and won't get // minimized. // This will be overridden in the test cases. The override can be minimized. var prettyPrinted = function prettyPrinted(msg) { return msg; }; // Mock Math.random. (function () { var index = 0 Math.random = function() { index = (index + 1) % 10; return index / 10.0; } })(); // Mock Date. (function () { var index = 0 var mockDate = 1477662728696 var mockDateNow = function() { index = (index + 1) % 10 mockDate = mockDate + index + 1 return mockDate } var origDate = Date; var constructDate = function(args) { if (args.length == 1) { var result = new origDate(args[0]); } else if (args.length == 2) { var result = new origDate(args[0], args[1]); } else if (args.length == 3) { var result = new origDate(args[0], args[1], args[2]); } else if (args.length == 4) { var result = new origDate(args[0], args[1], args[2], args[3]); } else if (args.length == 5) { var result = new origDate(args[0], args[1], args[2], args[3], args[4]); } else if (args.length == 6) { var result = new origDate( args[0], args[1], args[2], args[3], args[4], args[5]); } else if (args.length >= 7) { var result = new origDate( args[0], args[1], args[2], args[3], args[4], args[5], args[6]); } else { var result = new origDate(mockDateNow()); } result.constructor = function(...args) { return constructDate(args); } Object.defineProperty( result, "constructor", { configurable: false, writable: false }); return result } var handler = { apply: function (target, thisArg, args) { return constructDate(args) }, construct: function (target, args, newTarget) { return constructDate(args) }, get: function(target, property, receiver) { if (property == "now") { return mockDateNow; } if (property == "prototype") { return origDate.prototype } }, } Date = new Proxy(Date, handler); })(); // Mock performance methods. performance.now = function () { return 1.2; } performance.measureMemory = function () { return []; } // Mock readline so that test cases don't hang. readline = function () { return "foo"; } // Mock stack traces. Error.prepareStackTrace = function (error, structuredStackTrace) { return ""; }; Object.defineProperty( Error, 'prepareStackTrace', { configurable: false, writable: false }); // Mock buffer access in float typed arrays because of varying NaN patterns. (function () { const origIsNaN = isNaN; const mock = function(arrayType) { const handler = { construct: function(target, args) { for (let i = 0; i < args.length; i++) { if (origIsNaN(args[i])) { args[i] = 1; } } const obj = new ( Function.prototype.bind.call(arrayType, null, ...args)); return new Proxy(obj, { get: function(x, prop) { if (typeof x[prop] == "function") return x[prop].bind(obj) return x[prop]; }, }); }, }; return new Proxy(arrayType, handler); } Float32Array = mock(Float32Array); Float64Array = mock(Float64Array); })(); // Mock Worker. (function () { var index = 0; // TODO(machenbach): Randomize this for each test case, but keep stable // during comparison. Also data and random above. var workerMessages = [ undefined, 0, -1, "", "foo", 42, [], {}, [0], {"x": 0} ]; Worker = function(code){ try { print(prettyPrinted(eval(code))); } catch(e) { print(prettyPrinted(e)); } this.getMessage = function(){ index = (index + 1) % 10; return workerMessages[index]; } this.postMessage = function(msg){ print(prettyPrinted(msg)); } }; })();