Fix jasmine spec for broker async request

proxy/spec/broker.spec.coffee

@@ -3,36 +3,48 @@ jasmine tests for Snowflake broker
 ###
 
 # fake xhr
+# class XMLHttpRequest
 class XMLHttpRequest
+  constructor: ->
+    @onreadystatechange = null
   open: ->
+  setRequestHeader: ->
   send: ->
-  onreadystatechange: ->
   DONE: 1
 
 describe 'Broker', ->
 
   it 'can be created', ->
-    b = new Broker('fake')
+    b = new Broker 'fake'
     expect(b.url).toEqual 'https://fake/'
     expect(b.id).not.toBeNull()
 
-  it 'polls for client offer', (done) ->
-    b = new Broker('fake')
-    # TODO: fix this
+  it 'polls and promises a client offer', (done) ->
+    b = new Broker 'fake'
+    # fake successful request
+    spyOn(b, 'sendRequest').and.callFake ->
+      b.request.readyState = b.request.DONE
+      b.request.status = STATUS_OK
+      b.request.responseText = 'test'
+      b.request.onreadystatechange()
     poll = b.getClientOffer()
-    spyOn(b.request, 'open')
-    spyOn(b.request, 'send').and.callFake ->
-      b.onreadystatechange()
-    poll.then = ->
-      done()
     expect(poll).not.toBeNull()
-    # expect(b.request.open).toHaveBeenCalled()
-    # expect(b.request.send).toHaveBeenCalled()
-    # fake successful poll
-    b.request.readyState = XMLHttpRequest.DONE
-    b.request.status = STATUS_OK
-    b.request.responseText = 'test'
-    done()
+    poll.then (desc) =>
+      expect(desc).toEqual 'test'
+      done()
+
+  it 'requests correctly', ->
+    b = new Broker 'fake'
+    b.request = new XMLHttpRequest()
+    spyOn(b.request, 'open')
+    spyOn(b.request, 'setRequestHeader')
+    spyOn(b.request, 'send')
+    b.sendRequest()
+    expect(b.request.open).toHaveBeenCalled()
+    expect(b.request.setRequestHeader).toHaveBeenCalled()
+    expect(b.request.send).toHaveBeenCalled()
 
   it 'responds to the broker with answer', ->
-    # TODO
+    # TODO: fix
+    b = new Broker 'fake'
+    b.sendAnswer 'foo'