New Test Plugin based on JUnit Platform

[hendrikebbers]

Goal

Create a new unit testing / integration testing plugin(s) from ground up to use JUnit Jupiter plattform instead of handling all requirements on our own (as surefire/failsafe does). This includes selection of the test classes / test files etc. via the platform.

Requirements

• A requirement is to support the JPMS module system for testing incl. integration testing. This might be related to Better Java Module System support for Maven 4 #11

• The usage of the JUnit Jupiter Platform make the support for future testing frameworks easier, because it's foundation is based on the JUnit Jupiter platform.

• Supporting other testing frameworks is already offered via the JUnit Jupiter Platform (or via junit-jupiter-vintage, other engines):

  • JUnit 3
  • JUnit 4
  • JUnit Jupiter
  • TestNG
  • Cucumber

• In consequence the whole configuration(parallelizing, selecting files, suites etc.) for running unit- and integration tests will be done via the JUnit Jupiter platform... That means we would have in the end a single way of configuration instead of several ways.

TODO's

• Analyse what exactly has to be done to support classpath/module path
• What about configuration parameters and options?
• Naming conventions enough?
• As a starting point we can take a deep look into https://github.com/sormuras/junit-platform-maven-plugin

Based on #32