Add infos about test helpers

Author: codeliner

README.md

@@ -52,6 +52,8 @@ PDO_USER=postgres
 PDO_PWD=
 ```
 
+*Note: The DB runs insight a docker container. Use `localhost` as host name if you want to connect from your host system!*
+
 ### RabbitMQ
 
 The skeleton uses RabbitMQ as a message broker with a preconfigured exchange called `ui-exchange` and a corresponding
@@ -62,18 +64,16 @@ The skeleton also contains a demo JS client which connects to a websocket and co
 Open `http://localhost:8080/ws.html` in your browser and forward events on the queue with `$eventMachine->on(Event::MY_EVENT, UiExchange::class)`.
 Check `src/Api/Listener` for an example.
 
-### GraphQL 
-The skeleton exposes a GraphQL endpoint. You can send commands and queries using GraphQL.
-Event machine automatically generates a GraphQL schema from your message and type schemas. 
-For details check the comments in the various `src/Api` files.
- 
-The easiest way is to install one of the available GraphQL clients for Google Chrome:
+## Unit and Integration Tests
+
+We've prepared a `BaseTestCase` located in `tests`. Extend your test cases from that class to get access to some very useful test helpers.
+Check the tutorial for a detailed explanation.
 
-- [ChromeiQL](https://chrome.google.com/webstore/detail/chromeiql/fkkiamalmpiidkljmicmjfbieiclmeij)
-- [GraphiQL Feen](https://chrome.google.com/webstore/detail/graphiql-feen/mcbfdonlkfpbfdpimkjilhdneikhfklp)
+You can run the tests using docker:
 
-Point your GraphQL client to `http://localhost:8080/api/graphql`. It should inspect the schema generated by event machine and suggest you
-all available commands and queries.
+```bash
+docker-compose run php php vendor/bin/phpunit
+```
 
 ## Troubleshooting