package org.junit.tests.running.methods;
   
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertFalse;
   import static org.junit.Assert.assertTrue;
   
   import org.junit.Test;
   import org.junit.runner.JUnitCore;
   import org.junit.runner.Result;
  import org.junit.runner.notification.Failure;
  
  public class ExpectedTest {
  
      public static class Expected {
          @Test(expected = Exception.class)
          public void expected() throws Exception {
              throw new Exception();
          }
      }
  
      @Test
      public void expected() {
          JUnitCore core = new JUnitCore();
          Result result = core.run(Expected.class);
          assertTrue(result.wasSuccessful());
      }
  
      public static class Unexpected {
          @Test(expected = Exception.class)
          public void expected() throws Exception {
              throw new Error();
          }
      }
  
      @Test
      public void unexpected() {
          Result result = JUnitCore.runClasses(Unexpected.class);
          Failure failure = result.getFailures().get(0);
          String message = failure.getMessage();
          assertTrue(message.contains("expected<java.lang.Exception> but was<java.lang.Error>"));
          assertEquals(Error.class, failure.getException().getCause().getClass());
      }
  
      public static class NoneThrown {
          @Test(expected = Exception.class)
          public void nothing() {
          }
      }
  
      @Test
      public void noneThrown() {
          JUnitCore core = new JUnitCore();
          Result result = core.run(NoneThrown.class);
          assertFalse(result.wasSuccessful());
          String message = result.getFailures().get(0).getMessage();
          assertTrue(message.contains("Expected exception: java.lang.Exception"));
      }
  
      public static class ExpectSuperclass {
          @Test(expected = RuntimeException.class)
          public void throwsSubclass() {
              throw new ClassCastException();
          }
      }
  
      @Test
      public void expectsSuperclass() {
          assertTrue(new JUnitCore().run(ExpectSuperclass.class).wasSuccessful());
      }
  }