fy-shuffle/test/fy-shuffle.js

Customizable Fisher-Yates shuffle

"use strict";

var shuffle = require("../fy-shuffle");
var expect = require("chai").expect;

describe("fy-shuffle", function () {
	var rand = function () { return 0.5; };

	it("should work with empty array", function () {
		expect(shuffle([])).to.eql([]);
	});

	it("should work with a singleton", function () {
		expect(shuffle([1])).to.eql([1]);
	});

	it("should work with a list", function () {
		expect(shuffle([1, 2, 3, 4, 5], rand)).to.eql([1, 4, 2, 5, 3]);
	});
});