JSTests/ChakraCore/test/Array/toString.js

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

var echo = WScript.Echo;

function guarded_call(func) {
    try {
        func();
    } catch (e) {
        echo(e.name + " : " + e.message);
    }
}

var testCount = 0;
function scenario(title) {
    if (testCount > 0) {
        echo("\n");
    }
    echo((testCount++) + ".", title);
}

scenario("Array: default");
var arr = [1, 2, , 3];
echo(arr);

scenario("Array: Replaced Array.prototype.join");
Array.prototype.join = function () { return "replaced Array.prototype.join" };
echo(arr);

scenario("Array: Replaced non-callable Array.prototype.join");
Array.prototype.join = 1234; // non-callable
echo(arr);

scenario("Object: no join");
var o = {};
guarded_call(function () {
    echo(Array.prototype.toString.apply(o));
});

scenario("Object: has join");
var o = {
    join: function () { return "o join"; }
};
guarded_call(function () {
    echo(Array.prototype.toString.apply(o));
});

scenario("Object: non-callable join");
var o = {
    join: 1234
};
guarded_call(function () {
    echo(Array.prototype.toString.apply(o));
});

scenario("Object: no join, replaced Object.prototype.toString");
var o = {};
Object.prototype.toString = function () { return "replaced Object.prototype.toString"; }
guarded_call(function () {
    echo(Array.prototype.toString.apply(o));
});