Add junit5-jupiter-starter-maven-kotlin sample #70 #102

[daggerok]

This PR contains junit5-jupiter-starter-maven-kotlin sample.

Given project allows mix java and Kotlin test classes together by using JUnit 5 Jupiter and JUnit 4 Vintage test engines.

That PR was added in scope of existing Create "missing" samples #70 GitHub issue.

Overview

• contains wrapper (maven version: 3.6.1)
• supports java 1.8 (see pom-java8.xml file) as well as java 11
• using latest Jupiter versions at the moment and latest stable Kotlin available in maven central

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I hereby agree to the terms of the JUnit Contributor License Agreement.

[sormuras]

Thanks for figuring out a solution that works with Maven + Kotlin ... and submitting it as a sample. That's awesome!

• The junit5-samples focus on Java 8. Please remove the Java 11 based stage from the .travis.yml script. It'd be cool though, if you explain necessary changes (are there any?) for making your setup run on Java 11.
• The junit5-samples focus using published version of the "JUnit 5" artifacts. Can you please downgrade your setup to use Jupiter 5.4.2?
• Please remove the not matching source units from the language specific directories. Keep the information what works and what not in the README.md -- a sample should not show "bad" examples, like having .kt files below src/main/java.

[daggerok]

Hello @sormuras,

I have applied your review comments.
Not sure if I understand correctly your point:

Please remove the not matching source units from the language specific directories. Keep the information what works and what not in the README.md -- a sample should not show "bad" examples, like having .kt files below src/main/java.

There are actually no Kotlin files in src/main/java, it was note that they are going to be executed in case if they will be located there... Anyway, I have cleaned up README.md file

Please let me know if I missed something

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Regards

[daggerok]

Squashed commits

[daggerok]

Please review

[sormuras]

Thanks @daggerok!

[sormuras]

@daggerok -- do you want to take over #104 and/or #105 as well? ;-)

[daggerok]

Hey @sormuras,
Yes, I can take a look on it this weekend

[sormuras]

That'd be awesome.