Pig Latin Translator / Mocha example

pig.js

var assert = require("assert")

var pigLatinTrans = function(text){
    var pigText = text.replace(/[A-Za-z]+/gi,function(word){
        var letters = word.split('')
        var firstLetter = letters.shift()
        if (firstLetter.toUpperCase() == firstLetter){
            letters.push(firstLetter.toLowerCase())
            letters[0] = letters[0].toUpperCase()
            letters.push(firstLetter)
        }
        return letters.join('') + 'ay'
    })
    return pigText
}

describe("PigLatinTrans",function(){
    describe("pigLatinTrans",function(){
        it('can take phrase "hello" and see it translated to Pig Latin "ellohay"',function(){
            assert.equal(pigLatinTrans("hello"),"ellohay")
        })
        it('can take phrase "hello world" and see it translated to Pig Latin "ellohay orldway"',function(){
            assert.equal(pigLatinTrans("hello world"),"ellohay orldway")
        })
        it('can take phrase "Hello world" and see it translated to Pig Latin "Ellohay orldway"', function(){
            assert.equal(pigLatinTrans("Hello world"),"Ellohay orldway")
        })
        it('can take phrase "Hello, world!!" and see it translated to Pig Latin "Ellohay, orldway!!"', function(){
            assert.equal(pigLatinTrans("Hello, world!!"),"Ellohay, orldway!!")
        })
        it('can take phrase "eat apples" and see it translated to Pig Latin "eatay applesay"')
        it('can take phrase "quick brown fox" and see it translated to Pig Latin "ickquay ownbray oxfay"')
    })

})