Continuous-Integration-and-Continuous-Deployment.md

@@ -70,6 +70,10 @@ The first two stages are testing stages:
 
 #### `docker-test` and `testing`
 
+First all [Docker]() images are tested (or built). The testing stage consists of the following functionality tests: Each time a bash-script with prefix `test_` is executed. All scripts reside in `/bin` and exit with exit code `1` if something goes wrong. In case of a failing test, subsequent states of the pipeline stall.
+
+Check the code documentation provided by the scripts for further information.
+
 #### `testing`
 
 #### `build`