add notification backend and unit test

add notification init frontend

services/web/test/UnitTests/coffee/Notifications/NotificationsControllerTests.coffee

@@ -0,0 +1,39 @@
+SandboxedModule = require('sandboxed-module')
+assert = require('assert')
+require('chai').should()
+sinon = require('sinon')
+modulePath = require('path').join __dirname, '../../../../app/js/Features/Notifications/NotificationsController.js'
+
+
+describe 'NotificationsController', ->
+	user_id = "123nd3ijdks"
+	notification_id = "123njdskj9jlk"
+
+	beforeEach ->
+		@handler = 
+			getUserNotifications: sinon.stub().callsArgWith(1)
+			markAsRead: sinon.stub().callsArgWith(2)
+		@controller = SandboxedModule.require modulePath, requires:
+			"./NotificationsHandler":@handler
+			'logger-sharelatex':
+				log:->
+				err:->
+		@req =
+			params:
+				notification_id:notification_id
+			session:
+				user:
+					_id:user_id
+
+	it 'should ask the handler for all unread notifications', (done)->
+		allNotifications = [{_id: notification_id, user_id: user_id}]
+		@handler.getUserNotifications = sinon.stub().callsArgWith(1, null, allNotifications)
+		@controller.getAllUnreadNotifications @req, send:(body)=>
+			body.should.equal allNotifications
+			@handler.getUserNotifications.calledWith(user_id).should.equal true
+			done()
+
+	it 'should send a delete request when a delete has been received to mark a notification', (done)->
+		@controller.markNotificationAsRead @req, send:=>
+			@handler.markAsRead.calledWith(user_id, notification_id).should.equal true
+			done()