Reverty 1842 (see http://code.google.com/p/chromium/issues/detail?id=1717 )

test/mjsunit/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 JSC in making some functions undeletable.
-// See http://code.google.com/p/chromium/issues/detail?id=1717
-
-var array;
-
-array = [
-  "toString", "toLocaleString", "join", "pop", "push", "concat", "reverse",
-  "shift", "unshift", "slice", "splice", "sort", "filter", "forEach", "some",
-  "every", "map", "indexOf", "lastIndexOf", "reduce", "reduceRight"];
-CheckJSCSemantics(Array.prototype, array, "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"];
-CheckJSCSemantics(Date.prototype, array, "Date prototype");
-
-array = [
-  "random", "abs", "acos", "asin", "atan", "ceil", "cos", "exp", "floor", "log",
-  "round", "sin", "sqrt", "tan", "atan2", "pow", "max", "min"];
-CheckJSCSemantics(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");
-
-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");
-
-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");
-
-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"];
-CheckJSCSemantics(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 CheckJSCSemantics(type, props, name) {
-  print(name);
-  for (var i = 0; i < props.length; i++) {
-    CheckNotDeletable(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];
-  if (!type[prop]) return;
-  assertTrue(type.hasOwnProperty(prop), "inherited: " + prop);
-  var deleted = delete type[prop];
-  assertTrue(deleted, "delete operator returned false: " + prop);
-  assertFalse(type.hasOwnProperty(prop), "still there after delete: " + prop);
-  type[prop] = "foo";
-  assertEquals("foo", type[prop], "not overwritable: " + prop);
-}
-
-
-function CheckNotDeletable(type, prop) {
-  var old = type[prop];
-  if (!type[prop]) return;
-  assertTrue(type.hasOwnProperty(prop), "inherited: " + prop);
-  var deleted = delete type[prop];
-  // Comment this next line to pass the test on JSC:
-  assertFalse(deleted, "delete operator returned true: " + prop);
-  assertTrue(type.hasOwnProperty(prop), "not there after delete: " + prop);
-  type[prop] = "foo";
-  assertEquals("foo", type[prop], "not overwritable: " + prop);
-}
-
-
-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("foo", type[prop], "overwritable: " + prop);
-}
-
-print("OK");