package org.junit.tests.junit3compatibility;
   
   import static org.hamcrest.CoreMatchers.containsString;
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertThat;
   import static org.junit.Assert.assertTrue;
   
   import junit.framework.JUnit4TestAdapter;
   import junit.framework.TestCase;
  import junit.framework.TestSuite;
  import org.junit.runner.JUnitCore;
  import org.junit.runner.RunWith;
  import org.junit.runners.AllTests;
  
  public class AllTestsTest {
  
      private static boolean run;
  
      public static class OneTest extends TestCase {
          public void testSomething() {
              run = true;
          }
      }
  
      @RunWith(AllTests.class)
      public static class All {
          static public junit.framework.Test suite() {
              TestSuite suite = new TestSuite();
              suite.addTestSuite(OneTest.class);
              return suite;
          }
      }
  
      @org.junit.Test
      public void ensureTestIsRun() {
          JUnitCore runner = new JUnitCore();
          run = false; // Have to explicitly set run here because the runner might independently run OneTest above
          runner.run(All.class);
          assertTrue(run);
      }
  
      @org.junit.Test
      public void correctTestCount() throws Throwable {
          AllTests tests = new AllTests(All.class);
          assertEquals(1, tests.testCount());
      }
  
      @org.junit.Test
      public void someUsefulDescription() throws Throwable {
          AllTests tests = new AllTests(All.class);
          assertThat(tests.getDescription().toString(), containsString("OneTest"));
      }
  
      public static class JUnit4Test {
          @org.junit.Test
          public void testSomething() {
              run = true;
          }
      }
  
      @RunWith(AllTests.class)
      public static class AllJUnit4 {
          static public junit.framework.Test suite() {
              TestSuite suite = new TestSuite();
              suite.addTest(new JUnit4TestAdapter(JUnit4Test.class));
              return suite;
          }
      }
  
      @org.junit.Test
      public void correctTestCountAdapted() throws Throwable {
          AllTests tests = new AllTests(AllJUnit4.class);
          assertEquals(1, tests.testCount());
      }
  
      @RunWith(AllTests.class)
      public static class BadSuiteMethod {
          public static junit.framework.Test suite() {
              throw new RuntimeException("can't construct");
          }
      }
  
      @org.junit.Test(expected = RuntimeException.class)
      public void exceptionThrownWhenSuiteIsBad() throws Throwable {
          new AllTests(BadSuiteMethod.class);
      }
  }