type-of-is/test/BarfClasses.coffee

Determine and test types using constructor or {}.toString

class Grandparent 
  hi : 'hi'

class Parent extends Grandparent
  hi : 'ralph'

class Child extends Parent
  hi : 'UP'

class Derp
  hi : 'no'

module.exports = {
  Grandparent : Grandparent
  Parent      : Parent
  Child       : Child
  Derp        : Derp
}