Question

We have a unit tests parent Base class, and a set of unit tests extending the base class. I want every failing test to call a particular method. Is is possible to create a “hook” or something somewhere, i.e. passing tests do not call this method, but failing tests do at the end of execution.

Answer 1

You should look at TestWatcher class.
Create your own class extending TestWatcher, override the failed(Throwable e, Description description) method and add a rule to your test.

public class MyWatcher extends TestWatcher {
    @Override
    protected void failed(Throwable e, Description description) {
         callMyMethod();
    }
}

Your test :

public class MyTest {
      @Rule 
      public MyWatcher rule = new MyWatcher ();

      @Test
      public myTest(){...}
}

There also useful method in TestWatcher, like starting() and finished()