package org.junit.tests.running.classes;
   
   import static org.junit.Assert.assertEquals;
   
   import java.util.List;
   
   import org.junit.Test;
   import org.junit.runners.BlockJUnit4ClassRunner;
   import org.junit.runners.model.InitializationError;
  
  public class BlockJUnit4ClassRunnerTest {
      public static class OuterClass {
          public class Enclosed {
              @Test
              public void test() {
              }
          }
      }
  
      @Test
      public void detectNonStaticEnclosedClass() throws Exception {
          try {
              new BlockJUnit4ClassRunner(OuterClass.Enclosed.class);
          } catch (InitializationError e) {
              List<Throwable> causes = e.getCauses();
              assertEquals("Wrong number of causes.", 1, causes.size());
              assertEquals(
                      "Wrong exception.",
                      "The inner class org.junit.tests.running.classes.BlockJUnit4ClassRunnerTest$OuterClass$Enclosed is not static.",
                      causes.get(0).getMessage());
          }
      }
  }