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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
* Contributor:
* Jeff Walden <jwalden+code@mit.edu>
*/
//-----------------------------------------------------------------------------
print("ES5: Array.prototype.join");
/**************
* BEGIN TEST *
**************/
var count;
var stringifyCounter = { toString: function() { count++; return "obj"; } };
var arr = [1, 2, 3, 4, 5];
assertEq(arr.join(), "1,2,3,4,5");
assertEq(arr.join(","), "1,2,3,4,5");
assertEq(arr.join(undefined), "1,2,3,4,5");
assertEq(arr.join(4), "142434445");
assertEq(arr.join(""), "12345");
count = 0;
assertEq(arr.join(stringifyCounter), "1obj2obj3obj4obj5");
assertEq(count, 1);
var holey = [1, 2, , 4, 5];
assertEq(holey.join(), "1,2,,4,5");
assertEq(holey.join(","), "1,2,,4,5");
assertEq(holey.join(undefined), "1,2,,4,5");
assertEq(holey.join(4), "14244445");
count = 0;
assertEq(holey.join(stringifyCounter), "1obj2objobj4obj5");
assertEq(count, 1);
var nully = [1, 2, 3, null, 5];
assertEq(nully.join(), "1,2,3,,5");
assertEq(nully.join(","), "1,2,3,,5");
assertEq(nully.join(undefined), "1,2,3,,5");
assertEq(nully.join(4), "14243445");
count = 0;
assertEq(nully.join(stringifyCounter), "1obj2obj3objobj5");
assertEq(count, 1);
var undefiney = [1, undefined, 3, 4, 5];
assertEq(undefiney.join(), "1,,3,4,5");
assertEq(undefiney.join(","), "1,,3,4,5");
assertEq(undefiney.join(undefined), "1,,3,4,5");
assertEq(undefiney.join(4), "14434445");
count = 0;
assertEq(undefiney.join(stringifyCounter), "1objobj3obj4obj5");
assertEq(count, 1);
var log = '';
arr = {length: {valueOf: function () { log += "L"; return 2; }},
0: "x", 1: "z"};
var sep = {toString: function () { log += "S"; return "y"; }};
assertEq(Array.prototype.join.call(arr, sep), "xyz");
assertEq(log, "LS");
var funky =
{
toString: function()
{
Array.prototype[1] = "chorp";
Object.prototype[3] = "fnord";
return "funky";
}
};
var trailingHoles = [0, funky, /* 2 */, /* 3 */,];
assertEq(trailingHoles.join(""), "0funkyfnord");
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");
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