Forward all subscribe arguments from Subscriber to EventEmitter

spec/stdlib/subscriber-spec.coffee

@@ -1,9 +1,10 @@
 Subscriber = require 'subscriber'
 EventEmitter = require 'event-emitter'
 _ = require 'underscore'
+{$$} = require 'space-pen'
 
 describe "Subscriber", ->
-  [emitter1, emitter2, event1Handler, event2Handler, subscriber] = []
+  [emitter1, emitter2, emitter3, event1Handler, event2Handler, event3Handler, subscriber] = []
 
   class TestEventEmitter
   _.extend TestEventEmitter.prototype, EventEmitter
@@ -14,11 +15,17 @@ describe "Subscriber", ->
   beforeEach ->
     emitter1 = new TestEventEmitter
     emitter2 = new TestEventEmitter
+    emitter3 = $$ ->
+      @div =>
+        @a()
+        @span()
     subscriber = new TestSubscriber
     event1Handler = jasmine.createSpy("event1Handler")
     event2Handler = jasmine.createSpy("event2Handler")
+    event3Handler = jasmine.createSpy("event3Handler")
     subscriber.subscribe emitter1, 'event1', event1Handler
     subscriber.subscribe emitter2, 'event2', event2Handler
+    subscriber.subscribe emitter3, 'event3', 'a', event3Handler
 
   it "subscribes to events on the specified object", ->
     emitter1.trigger 'event1', 'foo'
@@ -27,6 +34,12 @@ describe "Subscriber", ->
     emitter2.trigger 'event2', 'bar'
     expect(event2Handler).toHaveBeenCalledWith('bar')
 
+    emitter3.find('span').trigger 'event3'
+    expect(event3Handler).not.toHaveBeenCalledWith()
+
+    emitter3.find('a').trigger 'event3'
+    expect(event3Handler).toHaveBeenCalled()
+
   it "allows an object to unsubscribe en-masse", ->
     subscriber.unsubscribe()
     emitter1.trigger 'event1', 'foo'

src/stdlib/subscriber.coffee

@@ -1,12 +1,15 @@
 _ = require 'underscore'
 
 module.exports =
-  subscribe: (eventEmitter, eventName, callback) ->
-    eventEmitter.on eventName, callback
+  subscribe: (eventEmitter, subscribeArgs...) ->
+    eventEmitter.on(subscribeArgs...)
+
     @subscriptions ?= []
     @subscriptionsByObject ?= new WeakMap
     @subscriptionsByObject.set(eventEmitter, []) unless @subscriptionsByObject.has(eventEmitter)
 
+    eventName = _.first(subscribeArgs)
+    callback = _.last(subscribeArgs)
     subscription = cancel: -> eventEmitter.off eventName, callback
     @subscriptions.push(subscription)
     @subscriptionsByObject.get(eventEmitter).push(subscription)