fizzbuzz_test.js

var fizzBuzz = require('../fizzbuzz')
  , should = require('chai').should();

describe('FizzBuzz Challenge', function() {

  it('should print "fizz" for multiples of 3', function() {
    fizzBuzz(3)[0].should.equal('fizz');
    fizzBuzz(9)[0].should.equal('fizz');
    fizzBuzz(333)[0].should.equal('fizz');
  });

  it('should print "buzz" for multiples of 5', function() {
    fizzBuzz(5)[0].should.equal('buzz');
    fizzBuzz(10)[0].should.equal('buzz');
    fizzBuzz(100)[0].should.equal('buzz');
  });

  it('should print "fizzbuzz" for multiples of 3 and 5', function() {
    fizzBuzz(15)[0].should.equal('fizzbuzz');
    fizzBuzz(30)[0].should.equal('fizzbuzz');
    fizzBuzz(300)[0].should.equal('fizzbuzz');
  });

  it('should print the number for anything not multiple of 3 or 5', function() {
    fizzBuzz(7)[0].should.equal(7);
    fizzBuzz(13)[0].should.equal(13);
    fizzBuzz(103)[0].should.equal(103);
  });
});