ChakraCore/test/Array/array_indexOfSparse.js

//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------

// Verify that the starting index param to indexOf is respected for sparse arrays

var a = new Array(0, 1);
a[4294967294] = 2;          // 2^32-2 - is max array element
a[4294967295] = 3;          // 2^32-1 added as non-array element property
a[4294967296] = 4;          // 2^32   added as non-array element property
a[4294967297] = 5;          // 2^32+1 added as non-array element property

print(a.indexOf(2, 4294967290)); // === 4294967294 &&
print(a.indexOf(3, 4294967290)); // === -1 &&
print(a.indexOf(4, 4294967290)); // === -1 &&
print(a.indexOf(5, 4294967290)); // === -1   ) ;

a[1111111] = 2;
a[1111112] = 3;
a[1111113] = 4;
a[1111114] = 5;

print(a.indexOf(2, 4294967290)); // === 4294967294 &&
print(a.indexOf(3, 4294967290)); // === -1 &&
print(a.indexOf(4, 4294967290)); // === -1 &&
print(a.indexOf(5, 4294967290)); // === -1   ) ;