test-tools

Collection of test utility classes:

• Subclass AbstractPackageDependenciesTest and annotate your packages with @DependsUpon to check dependencies between packages.
• Declare a @Rule with FileMemento to restore a file after the test.
• Overwrite and restore system properties with the SystemPropertiesRule.
• Declare a generic MementoRule for arbitrary things to restore, using a Supplier and a Consumer.
• Log the beginning and end of a test run, by declaring a TestLoggerRule.

Compatibility with JDK-9+

The AbstractPackageDependenciesTest depends on classes from the jdeps tool in JDK 8 residing in the tools.jar. This file has been removed in JDK 9 and the jdeps classes where moved into the module jdk.jdeps, but without exporting the classes, so we can't just add a module-info.java. This may become a problem in the future, but for now, we can live with a Maven profile, so building works on JDK8 and 9.