Fix unit tests

services/web/app/coffee/Features/Editor/EditorUpdatesController.coffee

@@ -18,11 +18,11 @@ module.exports = EditorUpdatesController =
 			if takeSnapshot
 				AutomaticSnapshotManager.markProjectAsUpdated(project_id)
 
-		logger.log doc_id: doc_id, project_id: project_id, client_id: update.meta.source, version: update.v, "sending update to doc updater"
+		logger.log doc_id: doc_id, project_id: project_id, client_id: update.meta?.source, version: update.v, "sending update to doc updater"
 
 		DocumentUpdaterHandler.queueChange project_id, doc_id, update, (error) ->
 			if error?
-				logger.error err:error, project_id: project_id, doc_id: doc_id, client_id: update.meta.source, version: update.v, "document was not available for update"
+				logger.error err:error, project_id: project_id, doc_id: doc_id, client_id: update.meta?.source, version: update.v, "document was not available for update"
 				client.disconnect()
 			callback(error)
 
@@ -52,7 +52,7 @@ module.exports = EditorUpdatesController =
 
 	_applyUpdateFromDocumentUpdater: (doc_id, update) ->
 		io = require('../../infrastructure/Server').io
-		logger.log doc_id: doc_id, version: update.v, source: update.meta.source, "distributing update"
+		logger.log doc_id: doc_id, version: update.v, source: update.meta?.source, "distributing update"
 		for client in io.sockets.clients(doc_id)
 			if client.id == update.meta.source
 				client.emit "otUpdateApplied", v: update.v, doc: update.doc

services/web/test/UnitTests/coffee/Editor/EditorUpdatesControllerTests.coffee

@@ -12,7 +12,7 @@ describe "EditorUpdatesController", ->
 		@client = new MockClient()
 		@callback = sinon.stub()
 		@EditorUpdatesController = SandboxedModule.require modulePath, requires:
-			"logger-sharelatex": @logger = { error: sinon.stub() }
+			"logger-sharelatex": @logger = { error: sinon.stub(), log: sinon.stub() }
 			"./EditorRealTimeController" : @EditorRealTimeController = {}
 			"../DocumentUpdater/DocumentUpdaterHandler" : @DocumentUpdaterHandler = {}
 			"../Versioning/AutomaticSnapshotManager" : @AutomaticSnapshotManager = {}