example syntax for declarative aync testing style (answer to http://blog.oozou.com/stateful-context-working-with-multiple-values-in-a-promise-chain/)

long.js

describe('following another user', function() {

  declare({
    // get rid of small functions with partials
    firstUser:  partial(createUser, 'foo'),
    secondUser: partial(createUser, 'bar')
    // no need for function introspection with this syntax
    // get knows strings describe dependencies and function are async
    // getTimeline is a function that accepts a user as arugment now
    timeline: partial(get, 'firstUser', getTimeline),

    // alternative syntax with less smart `get` could be:
    timeline2: function() { 
    	return get('firstUser').then(getTimeline); 
    },

    // `updateStatus`
    // is aware of currying and returns as a partial 
    // until it has all arguments it needs
    // 
    // with a less smart function we need to partial apply it first:
    // partial(updateStatus, 'My status')
    status: partial(get, 'secondUser', updateStatus('My status') ),
  
    // alternative syntax with less smart `get` could be:
    status2: function() { 
      return get('secondUser').then( updateStatus('My status') ); 
    }
  });


  beforeEach(function(done) {
    // `get` can also return promises for chaining
    // when we want to invoke it right away
    get('firstUser', 'secondUser')
      // `follow` takes two users
      // we can solve this by making `get`
      // return an array or object of users
      .then(follow)
      .then(done);
  });
  
  
  it('should display the status of B in A\'s timeline when A follows B', function(done) {
    get('timeline', 'status')
      .then(expectTimelineToContainStatus)
      .then(done);
  });

});

short.js

describe('following another user', function() {

  declare({
    firstUser:  partial(createUser, 'foo'),
    secondUser: partial(createUser, 'bar')
    timeline: partial(get, 'firstUser', getTimeline),
    status: partial(get, 'secondUser', updateStatus('My status') ),
  });

  beforeEach(function(done) {
    get('firstUser', 'secondUser')
      .then(follow)
      .then(done);
  });
  
  it('should display the status of B in A\'s timeline when A follows B', function(done) {
    get('timeline', 'status')
      .then(expectTimelineToContainStatus)
      .then(done);
  });

});