JezK
Edit File: undeletable-functions.js
// Copyright 2009 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * 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. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT // OWNER OR 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. // Test that we match ECMAScript in making most builtin functions // deletable and only specific ones undeletable or read-only. var array; array = [ "toString", "toLocaleString", "join", "pop", "push", "concat", "reverse", "shift", "unshift", "slice", "splice", "sort", "filter", "forEach", "some", "every", "map", "indexOf", "lastIndexOf", "reduce", "reduceRight"]; CheckEcmaSemantics(Array.prototype, array, "Array prototype"); var old_Array_prototype = Array.prototype; var new_Array_prototype = {}; for (var i = 0; i < 7; i++) { Array.prototype = new_Array_prototype; assertEquals(old_Array_prototype, Array.prototype); } array = [ "toString", "toDateString", "toTimeString", "toLocaleString", "toLocaleDateString", "toLocaleTimeString", "valueOf", "getTime", "getFullYear", "getUTCFullYear", "getMonth", "getUTCMonth", "getDate", "getUTCDate", "getDay", "getUTCDay", "getHours", "getUTCHours", "getMinutes", "getUTCMinutes", "getSeconds", "getUTCSeconds", "getMilliseconds", "getUTCMilliseconds", "getTimezoneOffset", "setTime", "setMilliseconds", "setUTCMilliseconds", "setSeconds", "setUTCSeconds", "setMinutes", "setUTCMinutes", "setHours", "setUTCHours", "setDate", "setUTCDate", "setMonth", "setUTCMonth", "setFullYear", "setUTCFullYear", "toGMTString", "toUTCString", "getYear", "setYear", "toISOString", "toJSON"]; CheckEcmaSemantics(Date.prototype, array, "Date prototype"); array = [ "random", "abs", "acos", "asin", "atan", "ceil", "cos", "exp", "floor", "log", "round", "sin", "sqrt", "tan", "atan2", "pow", "max", "min"]; CheckEcmaSemantics(Math, array, "Math1"); CheckEcmaSemantics(Date, ["UTC", "parse", "now"], "Date"); array = [ "E", "LN10", "LN2", "LOG2E", "LOG10E", "PI", "SQRT1_2", "SQRT2"]; CheckDontDelete(Math, array, "Math2"); array = [ "escape", "unescape", "decodeURI", "decodeURIComponent", "encodeURI", "encodeURIComponent", "isNaN", "isFinite", "parseInt", "parseFloat", "eval", "execScript"]; CheckEcmaSemantics(this, array, "Global"); CheckReadOnlyAttr(this, "Infinity"); CheckReadOnlyAttr(this, "NaN"); CheckReadOnlyAttr(this, "undefined"); array = ["exec", "test", "toString", "compile"]; CheckEcmaSemantics(RegExp.prototype, array, "RegExp prototype"); array = [ "toString", "toLocaleString", "valueOf", "hasOwnProperty", "isPrototypeOf", "propertyIsEnumerable", "__defineGetter__", "__lookupGetter__", "__defineSetter__", "__lookupSetter__"]; CheckEcmaSemantics(Object.prototype, array, "Object prototype"); var old_Object_prototype = Object.prototype; var new_Object_prototype = {}; for (var i = 0; i < 7; i++) { Object.prototype = new_Object_prototype; assertEquals(old_Object_prototype, Object.prototype); } array = [ "toString", "valueOf", "toJSON"]; CheckEcmaSemantics(Boolean.prototype, array, "Boolean prototype"); array = [ "toString", "toLocaleString", "valueOf", "toFixed", "toExponential", "toPrecision", "toJSON"]; CheckEcmaSemantics(Number.prototype, array, "Number prototype"); CheckEcmaSemantics(Function.prototype, ["toString"], "Function prototype"); CheckEcmaSemantics(Date.prototype, ["constructor"], "Date prototype constructor"); array = [ "charAt", "charCodeAt", "concat", "indexOf", "lastIndexOf", "localeCompare", "match", "replace", "search", "slice", "split", "substring", "substr", "toLowerCase", "toLocaleLowerCase", "toUpperCase", "toLocaleUpperCase", "link", "anchor", "fontcolor", "fontsize", "big", "blink", "bold", "fixed", "italics", "small", "strike", "sub", "sup", "toJSON", "toString", "valueOf"]; CheckEcmaSemantics(String.prototype, array, "String prototype"); CheckEcmaSemantics(String, ["fromCharCode"], "String"); function CheckEcmaSemantics(type, props, name) { print(name); for (var i = 0; i < props.length; i++) { CheckDeletable(type, props[i]); } } function CheckDontDelete(type, props, name) { print(name); for (var i = 0; i < props.length; i++) { CheckDontDeleteAttr(type, props[i]); } } function CheckDeletable(type, prop) { var old = type[prop]; var hasOwnProperty = Object.prototype.hasOwnProperty; if (!type[prop]) return; assertTrue(type.hasOwnProperty(prop), "inherited: " + prop); var deleted = delete type[prop]; assertTrue(deleted, "delete operator returned false: " + prop); assertFalse(hasOwnProperty.call(type, prop), "still there after delete: " + prop); type[prop] = "foo"; assertEquals("foo", type[prop], "not overwritable: " + prop); type[prop] = old; } function CheckDontDeleteAttr(type, prop) { var old = type[prop]; if (!type[prop]) return; assertTrue(type.hasOwnProperty(prop), "inherited: " + prop); var deleted = delete type[prop]; assertFalse(deleted, "delete operator returned true: " + prop); assertTrue(type.hasOwnProperty(prop), "not there after delete: " + prop); type[prop] = "foo"; assertFalse("foo" == type[prop], "overwritable: " + prop); } function CheckReadOnlyAttr(type, prop) { var old = type[prop]; if (!type[prop]) return; assertTrue(type.hasOwnProperty(prop), "inherited: " + prop); var deleted = delete type[prop]; assertFalse(deleted, "delete operator returned true: " + prop); assertTrue(type.hasOwnProperty(prop), "not there after delete: " + prop); type[prop] = "foo"; assertEquals(old, type[prop], "overwritable: " + prop); } print("OK");