forwarder/spec/ForwarderJs_spec.js

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

expect = require('chai').expect
forward = require('../src/forwarder').forward

describe( "forwarder", function(){ 
  obj = { name: "no name so far" }

  it( "forwards", function(){
    forward( obj, 'split', {to: 'name'});
    expect( obj.split( ' ' )).to.deep.equal( ['no', 'name', 'so', 'far'] )
  });

  it( "forwards with translations", function(){
    forward( obj, 'seperate', {to: 'name', as: 'split'} );
    expect( obj.seperate( ' ' )).to.deep.equal( ['no', 'name', 'so', 'far'] );
  });

  it( "raises an error for unforwarded messages", function(){
    expect( 
      function(){ obj.undefinedMethod(); }
    ).to.throw( TypeError );
  });

  it( "raises an error if to: is missing", function(){
    expect(
      function(){
        forward( obj, 'whatever', {as: 'other'} );
      } 
    ).to.throw( TypeError, "missing keyword arg to:" );
  });

  it( "sets arguments", function(){
    forward( obj, 'splitByOes', {to: 'name', as: 'split', with: ['o']});
    expect(
      obj.splitByOes()
    ).to.deep.equal( ['n', ' name s', ' far'] );
  });

});