Gradle and JUnit categories

JUnit 4.8 added experimental support for grouping tests using categories and Gradle has support for including/excluding categories as part of the DSL for configuring testing. This is an example of using the functionality.

There are several possible targets:

• gradle test: run all tests
• gradle runSlow: run only tests annotated with SlowTest.class as the category
• gradle runFast: run only tests annotated with FastTest.class as the category
• gradle runCategories -Pcategories=<categoryList>: run tests annotated with one or more categories (comma-separated). The category name needs to be the canonical class name; for this example you can specify SlowTest or FastTest because they live in the default package