Random object generator in JavaScript

Gjorgji picture Gjorgji · Mar 14, 2010 · Viewed 8.2k times · Source

I need a random object generator in JavaScript that generates a variety of objects with different fields and values. Any ideas where I can find such tool?

I need to generate random objects with various complexity.. My goal is to use JSON in order to serialize these objects and fuzz test my application http api.

Answer

user216441 picture user216441 · Mar 14, 2010
function createRandomObj(fieldCount, allowNested)
{
    var generatedObj = {};

    for(var i = 0; i < fieldCount; i++) {
        var generatedObjField;

        switch(randomInt(allowNested ? 6 : 5)) {

            case 0:
            generatedObjField = randomInt(1000);
            break;

            case 1:
            generatedObjField = Math.random();
            break;

            case 2:
            generatedObjField = Math.random() < 0.5 ? true : false;
            break;

            case 3:
            generatedObjField = randomString(randomInt(4) + 4);
            break;

            case 4:
            generatedObjField = null;
            break;

            case 5:
            generatedObjField = createRandomObj(fieldCount, allowNested);
            break;
        }
        generatedObj[randomString(8)] = generatedObjField;
    }
    return generatedObj;
}

// helper functions

function randomInt(rightBound)
{
    return Math.floor(Math.random() * rightBound);
}

function randomString(size)
{
    var alphaChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    var generatedString = '';
    for(var i = 0; i < size; i++) {
        generatedString += alphaChars[randomInt(alphaChars.length)];
    }

    return generatedString;
}

It will create a obj with X paramenters, all with a integer, float, string, boolean or null value.
I just made it :B