Add link to sample tests inside the README

Author: mannodermaus

README.md

@@ -35,7 +35,8 @@ dependencies {
 This plugin configures the `junitPlatform` task for each registered build variant of a project.
 It automatically attaches both the Jupiter & Vintage Engines during the execution phase of your tests.
 
-Further instructions on how to write JUnit 5 tests can be found [in their User Guide][junit5ug].
+More instructions on how to write JUnit 5 tests can be found [in their User Guide][junit5ug].
+Furthermore, this repository provides a small showcase of the functionality provided by JUnit 5 [here][sampletests].
 
 ## Extras
 
@@ -56,3 +57,4 @@ junitPlatform {
  [junit5ug]: http://junit.org/junit5/docs/current/user-guide
  [travisci]: https://travis-ci.org/aurae/android-junit5
  [sonatyperepo]: https://oss.sonatype.org/content/repositories/snapshots
+ [sampletests]: https://github.com/aurae/android-junit5/tree/master/sample/src/test