Basic Jasmine CoffeeScript test

Password.coffee

window.Password = class Password
  constructor: (passphrase) ->
    @strength = @calcStrength passphrase.length
  
  calcStrength: (len) ->
    len--
    
    if len / 3 > 10 # everything with a length-1 > 30 gets a strength of 10
      10
    else
      Math.floor len / 3 # everything else gets a strength of its length-1 divided by 3

pwd_spec.coffee

describe "Password", ->
  it "should report bad passwords", ->
    password = new Password 'bad'
    
    (expect password.strength).toEqual 0
  
  it "should report average passwords", ->
    password = new Password 'thisisaverage'

    (expect password.strength).toEqual 4
  
  it "should report good passwords", ->
    password = new Password 'thisisagoodpasswordassaidbyxkcd'
    
    (expect password.strength).toEqual 10