The Devoxx 2017 Hands on Lab for Ratpack.
Each Lab has two directories the lab for you to work on getting all the tests to pass and one answer directory that has a complete solution for the lab. Also there is a LAB.md file in each directory with some general guidence.
TIP: Take advantage of Gradle's continuous mode when modifying your code. This will continually run tests on each modification that Gradle detects to your source files.
example:
./gradlew :lab-01:test --continuous
If you're using IntelliJ execute ./gradlew idea before getting started.