The Tor Browser: js/src/tests/ecma_6/Array/for_of_4.js@129ffea94266 (annotated)

js/src/tests/ecma_6/Array/for_of_4.js@129ffea94266 (annotated)

js/src/tests/ecma_6/Array/for_of_4.js

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 // Test corner cases of for-of iteration over Arrays.
 // The current spidermonkey JSOP_SPREAD implementation for function calls
 // with '...rest' arguments uses a ForOfIterator to extract values from
 // the array, so we use that mechanism to test ForOfIterator here.
 //
 // Check array length decreases changes during iteration.
 //
 function TestDecreaseArrayLength() {
     function doIter(f, arr) {
         return f(...arr)
     }
     function fun(a, b, c) {
         var result = 0;
         for (var i = 0; i < arguments.length; i++)
             result += arguments[i];
         return result;
     }
     var GET_COUNT = 0;
     function getter() {
         GET_COUNT++;
         if (GET_COUNT == MID) {
             arr.length = 0;
         }
         return M2;
     }
     var iter = ([])['@@iterator']();
     var iterProto = Object.getPrototypeOf(iter);
     var OldNext = iterProto.next;
     var NewNext = function () {
         return OldNext.apply(this, arguments);
     };
     var TRUE_SUM = 0;
     var N = 100;
     var MID = N/2;
     var M = 3;
     var arr = new Array(M);
     var ARR_SUM = 0;
     for (var j = 0; j < M; j++) {
         arr[j] = j;
         ARR_SUM += j;
     }
     var M2 = (M/2)|0;
     Object.defineProperty(arr, M2, {'get':getter});
     var sum = 0;
     for (var i = 0; i < N; i++) {
         var oldLen = arr.length;
         sum += doIter(fun, arr);
         var newLen = arr.length;
         if (oldLen == newLen)
             TRUE_SUM += arr.length > 0 ? ARR_SUM : 0;
         else
             TRUE_SUM += 1
     }
     assertEq(sum, TRUE_SUM);
 }
 TestDecreaseArrayLength();
 if (typeof reportCompare === "function")
   reportCompare(true, true);