exit if mock servers fail to start

services/track-changes/test/acceptance/coffee/helpers/MockDocStoreApi.coffee

@@ -19,6 +19,9 @@ module.exports = MockDocUpdaterApi =
 
 		app.listen 3016, (error) ->
 			throw error if error?
+		.on "error", (error) ->
+			console.error "error starting MockDocStoreApi:", error.message
+			process.exit(1)
 
 MockDocUpdaterApi.run()
 

services/track-changes/test/acceptance/coffee/helpers/MockDocUpdaterApi.coffee

@@ -31,6 +31,10 @@ module.exports = MockDocUpdaterApi =
 
 		app.listen 3003, (error) ->
 			throw error if error?
+		.on "error", (error) ->
+			console.error "error starting MockDocUpdaterApi:", error.message
+			process.exit(1)
+
 
 MockDocUpdaterApi.run()
 

services/track-changes/test/acceptance/coffee/helpers/MockWebApi.coffee

@@ -33,6 +33,9 @@ module.exports = MockWebApi =
 
 		app.listen 3000, (error) ->
 			throw error if error?
+		.on "error", (error) ->
+			console.error "error starting MockWebApiServer:", error.message
+			process.exit(1)
 
 MockWebApi.run()