Add methods to extras' InternalPackedArray

test/cctest/test-extra.js

 // Copyright 2015 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.
 
 (function (global, binding, v8) {
   'use strict';
   binding.testExtraShouldReturnFive = function() {
     return 5;
   };
 
@@ skipping 10 matching lines @@
   const Object = global.Object;
   const hasOwn = v8.uncurryThis(Object.prototype.hasOwnProperty);
 
   const Function = global.Function;
   const call = v8.uncurryThis(Function.prototype.call);
   const apply = v8.uncurryThis(Function.prototype.apply);
 
   const Promise = global.Promise;
   const Promise_resolve = v8.simpleBind(Promise.resolve, Promise);
 
+  const arrayToTest = new v8.InternalPackedArray();
+  arrayToTest.push(1);
+  arrayToTest.push(2);
+  arrayToTest.pop();
+  arrayToTest.unshift("a", "b", "c");
+  arrayToTest.shift();
+  arrayToTest.splice(0, 1);
+  const slicedArray = arrayToTest.slice();
+  const arraysOK = arrayToTest.length === 2 && arrayToTest[0] === "c" &&
+      arrayToTest[1] === 1 && slicedArray.length === 2 &&
+      slicedArray[0] === "c" && slicedArray[1] === 1;
+
   binding.testExtraCanUseUtils = function() {
     const fulfilledPromise = v8.createPromise();
     v8.resolvePromise(
       fulfilledPromise,
       hasOwn({ test: 'test' }, 'test') ? 1 : -1
     );
 
-    const fulfilledPromise2 = Promise_resolve(call(function (arg1) {
-      return (this.prop === arg1 && arg1 === 'value') ? 2 : -1;
-    }, { prop: 'value' }, 'value'));
+    const fulfilledPromise2 = Promise_resolve(call(function (arg1, arg2) {
+      return (this.prop === arg1 && arg1 === 'value' && arg2) ? 2 : -1;
+    }, { prop: 'value' }, 'value', arraysOK));
 
     const rejectedPromise = v8.createPromise();
     v8.rejectPromise(rejectedPromise, apply(function (arg1, arg2) {
       return (arg1 === arg2 && arg2 === 'x') ? 3 : -1;
     }, null, new v8.InternalPackedArray('x', 'x')));
 
     return {
       privateSymbol: v8.createPrivateSymbol('sym'),
       fulfilledPromise, // should be fulfilled with 1
       fulfilledPromise2, // should be fulfilled with 2
       rejectedPromise // should be rejected with 3
     };
   };
 })