How to listen to Test Suite changes in order to change some configurations

Question

I have many Spring Test classes (defined using @RunWith(SpringJUnit4ClassRunner)) that I want to group in test suites so that I load new configurations once for every suite instead of for every test class.

Right now I have a TestExecutionListener listener to every Spring test that will reload the configurations, but I want to save that since many tests share the same configurations.

Sadly, niether Spring supports listening to JUnit TestSuites nor JUnit supports the listener concept for TestSuites.

Answer 1

If you wish to perform actions before/after a junit test suite, you can use @BeforeClass and @AfterClass, or even @ClassRule. You can do your setup in there for the entire suite. Using the following example:

@RunWith(Suite.class)
@SuiteClasses({ ExpectedFailureTest.class, RetryTest.class })
public class BeforeClassSuite {
  @BeforeClass
  public static void beforeClass() {
    System.out.println("beforeClass");
  }

  @AfterClass
  public static void afterClass() {
    System.out.println("afterClass");
  }

  @ClassRule
  public static ExternalResource resource = new ExternalResource() {
    @Override
    protected void before() throws Throwable {
      System.out.println("before");
    };

    @Override
    protected void after() {
      System.out.println("after");
    };
  };
}

This produces as output:

before
beforeClass
... output from tests
afterClass
after