Testing JS's random number distribution

js-rand-test.js

// repl.it test: http://repl.it/WDj/

var keys = ["0", "1", "2"]
var keyCount = {
    0: 0,
    1: 0,
    2: 0
};

function randGen( randArray ) {
    return Math.floor( Math.random() * keys.length )
}

var reps = 1000000;

while ( reps >= 0 ) {
    
    var temp_rand = randGen( keys );
    keyCount[ temp_rand ] = keyCount[ temp_rand] + 1;
      
    reps--;
}

console.log( keyCount );