discussion reply tinymce keyboard shortcut icon renders correctly

fixes CNVS-18665

test plan:
- create a discussion, with a reply
- click on two different reply lines, so that two instances of tinymce
  open up
- each one should have their own keyboard shortcuts icon (the 'i' in
  a blue bubble)
- basic regression test of discussion replies

Change-Id: I855cea72caf56f250f2334da10bebd4c8a881bdf
Reviewed-on: https://gerrit.instructure.com/49250
Tested-by: Jenkins
Reviewed-by: Steven Burnett <sburnett@instructure.com>
QA-Review: Nathan Rogowski <nathan@instructure.com>
QA-Review: Adam Stone <astone@instructure.com>
Product-Review: Aaron Cannon <acannon@instructure.com>

app/coffeescripts/discussions/Reply.coffee

@@ -40,7 +40,7 @@ define [
 
 
     attachKeyboardShortcuts: =>
-      $('.toggle-wrapper').first().before((new KeyboardShortcuts()).render().$el)
+      @view.$('.toggle-wrapper').first().before((new KeyboardShortcuts()).render().$el)
 
     ##
     # Shows or hides the TinyMCE editor for a reply

app/coffeescripts/models/Entry.coffee

@@ -15,8 +15,7 @@ define [
   # Model representing an entry in discussion topic
   class Entry extends Backbone.Model
 
-    defaults:
-
+    defaults: ->
       ##
       # Attributes persisted with the server
       id: null

spec/coffeescripts/views/DiscussionTopic/EntryViewSpec.coffee

@@ -0,0 +1,54 @@
+define [
+  'jquery'
+  'compiled/models/Entry'
+  'compiled/views/DiscussionTopic/EntryView'
+  'compiled/discussions/Reply'
+  'helpers/fakeENV'
+], ($, Entry, EntryView, Reply, fakeENV) ->
+
+  module 'EntryView',
+    setup: ->
+      fakeENV.setup
+        DISCUSSION:
+          PERMISSIONS: { CAN_REPLY: true }
+          CURRENT_USER: {}
+          THREADED: true
+
+    teardown: ->
+      fakeENV.teardown()
+      $('#fixtures').empty()
+
+  test 'renders', ->
+    entry = new Entry(id: 1, message: 'hi')
+    $('#fixtures').append($('<div />').attr('id', 'e1'))
+    view = new EntryView
+      model: entry
+      el: '#e1'
+    view.render()
+    ok view
+
+  test 'two entries do not render keyboard shortcuts to the same place', ->
+    clock = sinon.useFakeTimers()
+    sinon.stub(Reply.prototype, 'edit')
+    $('#fixtures').append($('<div />').attr('id', 'e1'))
+    $('#fixtures').append($('<div />').attr('id', 'e2'))
+
+    entry1 = new Entry(id: 1, message: 'hi')
+    entry2 = new Entry(id: 2, message: 'reply')
+    view1 = new EntryView
+      model: entry1
+      el: '#e1'
+    view1.render()
+    view1.addReply()
+    view2 = new EntryView
+      model: entry2
+      el: '#e2'
+    view2.render()
+    view2.addReply()
+
+    clock.tick 1
+
+    equal view1.$('.tinymce-keyboard-shortcuts-toggle').length, 1
+    equal view2.$('.tinymce-keyboard-shortcuts-toggle').length, 1
+
+    clock.restore()