The Tor Browser: js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js@6474c204b198 (annotated)

js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js@6474c204b198 (annotated)

js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/licenses/publicdomain/
  */
 var BUGNUMBER = 640072;
 var summary =
   "Represent /a/.{lastIndex,global,source,multiline,sticky,ignoreCase} with " +
   "plain old data properties";
 print(BUGNUMBER + ": " + summary);
 /**************
  * BEGIN TEST *
  **************/
 function checkDataProperty(obj, p, expect, msg)
 {
   var d = Object.getOwnPropertyDescriptor(obj, p);
   assertEq(d.value, expect.value, msg + ": bad value for " + p);
   assertEq(d.writable, expect.writable, msg + ": bad writable for " + p);
   assertEq(d.enumerable, expect.enumerable, msg + ": bad enumerable for " + p);
   assertEq(d.configurable, expect.configurable, msg + ": bad configurable for " + p);
   // Try redefining the property using its initial values: these should all be
   // silent no-ops.
   Object.defineProperty(obj, p, { value: expect.value });
   Object.defineProperty(obj, p, { writable: expect.writable });
   Object.defineProperty(obj, p, { enumerable: expect.enumerable });
   Object.defineProperty(obj, p, { configurable: expect.configurable });
   var d2 = Object.getOwnPropertyDescriptor(obj, p);
   assertEq(d.value, d2.value, msg + ": value changed on redefinition of " + p + "?");
   assertEq(d.writable, d2.writable, msg + ": writable changed on redefinition of " + p + "?");
   assertEq(d.enumerable, d2.enumerable, msg + ": enumerable changed on redefinition of " + p + "?");
   assertEq(d.configurable, d2.configurable, msg + ": configurable changed on redefinition of " + p + "?");
 }
 // Check a bunch of "empty" regular expressions first.
 var choices = [{ msg: "RegExp.prototype",
                  get: function() { return RegExp.prototype; } },
                { msg: "new RegExp()",
                  get: function() { return new RegExp(); } },
                { msg: "/(?:)/",
                  get: Function("return /(?:)/;") }];
 function checkRegExp(r, msg, lastIndex, global, ignoreCase, multiline)
 {
   var expect;
   expect = { value: lastIndex, enumerable: false, configurable: false, writable: true };
   checkDataProperty(r, "lastIndex", expect, msg);
   // check source specially: its value is under-defined in the spec
   var d = Object.getOwnPropertyDescriptor(r, "source");
   assertEq(d.writable, false, "bad writable: " + msg);
   assertEq(d.enumerable, false, "bad enumerable: " + msg);
   assertEq(d.configurable, false, "bad configurable: " + msg);
   expect = { value: global, enumerable: false, configurable: false, writable: false };
   checkDataProperty(r, "global", expect, msg);
   expect = { value: ignoreCase, enumerable: false, configurable: false, writable: false };
   checkDataProperty(r, "ignoreCase", expect, msg);
   expect = { value: multiline, enumerable: false, configurable: false, writable: false };
   checkDataProperty(r, "multiline", expect, msg);
 }
 checkRegExp(RegExp.prototype, "RegExp.prototype", 0, false, false, false);
 checkRegExp(new RegExp(), "new RegExp()", 0, false, false, false);
 checkRegExp(/(?:)/, "/(?:)/", 0, false, false, false);
 checkRegExp(Function("return /(?:)/;")(), 'Function("return /(?:)/;")()', 0, false, false, false);
 for (var i = 0; i < choices.length; i++)
 {
   var choice = choices[i];
   var msg = choice.msg;
   var r = choice.get();
   checkRegExp(r, msg, 0, false, false, false);
 }
 // Now test less generic regular expressions
 checkRegExp(/a/gim, "/a/gim", 0, true, true, true);
 var r;
 do
 {
   r = /abcd/mg;
   checkRegExp(r, "/abcd/mg initially", 0, true, false, true);
   r.exec("abcdefg");
   checkRegExp(r, "/abcd/mg step 1", 4, true, false, true);
   r.exec("abcdabcd");
   checkRegExp(r, "/abcd/mg step 2", 8, true, false, true);
   r.exec("abcdabcd");
   checkRegExp(r, "/abcd/mg end", 0, true, false, true);
   r = /cde/ig;
   checkRegExp(r, "/cde/ig initially", 0, true, true, false);
   var obj = r.lastIndex = { valueOf: function() { return 2; } };
   checkRegExp(r, "/cde/ig after lastIndex", obj, true, true, false);
   r.exec("aaacdef");
   checkRegExp(r, "/cde/ig after exec", 6, true, true, false);
   Object.defineProperty(r, "lastIndex", { value: 3 });
   checkRegExp(r, "/cde/ig after define 3", 3, true, true, false);
   Object.defineProperty(r, "lastIndex", { value: obj });
   checkRegExp(r, "/cde/ig after lastIndex", obj, true, true, false);
   // Tricky bits of testing: make sure that redefining lastIndex doesn't change
   // the slot where the lastIndex property is initially stored, even if
   // the redefinition also changes writability.
   r = /a/g;
   checkRegExp(r, "/a/g initially", 0, true, false, false);
   Object.defineProperty(r, "lastIndex", { value: 2 });
   r.exec("aabbbba");
   checkRegExp(r, "/a/g after first exec", 7, true, false, false);
   assertEq(r.lastIndex, 7);
   r.lastIndex = 2;
   checkRegExp(r, "/a/g after assign", 2, true, false, false);
   r.exec("aabbbba");
   assertEq(r.lastIndex, 7); // check in reverse order
   checkRegExp(r, "/a/g after second exec", 7, true, false, false);
   r = /c/g;
   r.lastIndex = 2;
   checkRegExp(r, "/c/g initially", 2, true, false, false);
   Object.defineProperty(r, "lastIndex", { writable: false });
   assertEq(Object.getOwnPropertyDescriptor(r, "lastIndex").writable, false);
   try { r.exec("aabbbba"); } catch (e) { /* swallow error if thrown */ }
   assertEq(Object.getOwnPropertyDescriptor(r, "lastIndex").writable, false);
   assertEq(Object.getOwnPropertyDescriptor(r, "source").writable, false);
   assertEq(Object.getOwnPropertyDescriptor(r, "global").value, true);
   assertEq(Object.getOwnPropertyDescriptor(r, "global").writable, false);
   assertEq(Object.getOwnPropertyDescriptor(r, "ignoreCase").value, false);
   assertEq(Object.getOwnPropertyDescriptor(r, "ignoreCase").writable, false);
   assertEq(Object.getOwnPropertyDescriptor(r, "multiline").value, false);
   assertEq(Object.getOwnPropertyDescriptor(r, "multiline").writable, false);
 }
 while (Math.random() > 17); // fake loop to discourage RegExp object caching
 /******************************************************************************/
 if (typeof reportCompare === "function")
   reportCompare(true, true);
 print("All tests passed!");