JSTests/test262/test/built-ins/Array/prototype/splice/15.4.4.12-9-c-ii-1.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-array.prototype.splice
es5id: 15.4.4.12-9-c-ii-1
description: >
    Array.prototype.splice will splice an array even when
    Array.prototype has index '0' set to read-only and 'fromPresent'
    less than 'actualDeleteCount (Step 9.c.ii)
---*/

            var arr = ["a", "b", "c"];
            Array.prototype[0] = "test";
            var newArr = arr.splice(2, 1, "d");

            var verifyValue = false;
            verifyValue = arr.length === 3 && arr[0] === "a" && arr[1] === "b" && arr[2] === "d"
                && newArr[0] === "c" && newArr.length === 1;

            var verifyEnumerable = false;
            for (var p in newArr) {
                if (newArr.hasOwnProperty("0") && p === "0") {
                    verifyEnumerable = true;
                }
            }

            var verifyWritable = false;
            newArr[0] = 12;
            verifyWritable = newArr[0] === 12;

            var verifyConfigurable = false;
            delete newArr[0];
            verifyConfigurable = newArr.hasOwnProperty("0");

assert(verifyValue, 'verifyValue !== true');
assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
assert(verifyEnumerable, 'verifyEnumerable !== true');
assert(verifyWritable, 'verifyWritable !== true');