forwarder/spec/ExtendForwarderClass_spec.coffee

Forwarding of messages to different objects (mostly properties of the receiver)

{ expect } = require "chai"
{ Forwarder } = require "../src/forwarder"
_ = require "underscore"

class F extends Forwarder 
  constructor: ->
    @name = "no name so far"
    @forward 'split', to: "name"
    @forward 'seperate', to: 'name', as: 'split'
    @forward 'splitByOes', to: 'name', as: 'split', with: ['o']
    @forward 'tokenize', to: 'designation', as: 'split', with: [' ']

  designation: -> @name

describe "forwarder", ->
  obj = new F()

  it "forwards", ->
    expect( obj.split ' ' ).to.deep.equal ['no', 'name', 'so', 'far']

  it "forwards with translations", ->
    expect( obj.seperate ' ' ).to.deep.equal ['no', 'name', 'so', 'far']

  it "raises an error for unforwarded messages", ->
    expect( 
      -> obj.undefinedMethod()
    ).to.throw TypeError

  it "sets arguments", ->
    expect(
      obj.splitByOes()
    ).to.deep.equal ['n', ' name s', ' far']

  it 'forwards to methods too', ->
    expect(
      obj.tokenize()
    ).to.deep.equal ['no', 'name', 'so', 'far']