Examples of org.junit.runners.BlockJUnit4ClassRunner

org.junit.runners.BlockJUnit4ClassRunner
Implements the JUnit 4 standard test case class model, as defined by the annotations in the org.junit package. Many users will never notice this class: it is now the default test class runner, but it should have exactly the same behavior as the old test class runner ( {@code JUnit4ClassRunner}).
BlockJUnit4ClassRunner has advantages for writers of custom JUnit runners that are slight changes to the default behavior, however:
- It has a much simpler implementation based on {@link Statement}s, allowing new operations to be inserted into the appropriate point in the execution flow.
- It is published, and extension and reuse are encouraged, whereas {@code JUnit4ClassRunner} was in an internal package, and is now deprecated.
In turn, in 2009 we introduced {@link Rule}s. In many cases where extending BlockJUnit4ClassRunner was necessary to add new behavior, {@link Rule}s can be used, which makes the extension more reusable and composable. @since 4.5

    }
  }
  
  public static Runner create(Class<?> clazz) throws InitializationError, org.junit.internal.runners.InitializationError {
    if (jUnit45OrHigher) {
      return new BlockJUnit4ClassRunner(clazz) {
                protected Statement withBefores(FrameworkMethod method, Object target, Statement statement) {
                  initMocks(target);
                  return super.withBefores(method, target, statement);
              }
          };

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  }


  @Test
  public void useChildHarvester() throws InitializationError {
    log= "";
    ParentRunner<?> runner= new BlockJUnit4ClassRunner(FruitTest.class);
    runner.setScheduler(new RunnerScheduler() {
      public void schedule(Runnable childStatement) {
        log+= "before ";
        childStatement.run();
        log+= "after ";
      }


      public void finished() {
        log+= "afterAll ";
      }
    });


    runner.run(new RunNotifier());
    assertEquals("before apple after before banana after afterAll ", log);
  }

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        { SubShadows.class, 0 } });
  }
  
  private List<Throwable> validateAllMethods(Class<?> clazz) {
    try {
      new BlockJUnit4ClassRunner(clazz);
    } catch (InitializationError e) {
      return e.getCauses();
    }
    return Collections.emptyList();
  }

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  }


  @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.",

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import org.junit.tests.validation.anotherpackage.Sub;


public class InaccessibleBaseClassTest {
  @Test(expected= InitializationError.class)
  public void inaccessibleBaseClassIsCaughtAtValidation() throws InitializationError {
    new BlockJUnit4ClassRunner(Sub.class);
  }

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  @Test
  public void categoryFilterLeavesOnlyMatchingMethods()
      throws InitializationError, NoTestsRemainException {
    CategoryFilter filter= CategoryFilter.include(SlowTests.class);
    BlockJUnit4ClassRunner runner= new BlockJUnit4ClassRunner(A.class);
    filter.apply(runner);
    assertEquals(1, runner.testCount());
  }

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  @Test
  public void categoryFilterRejectsIncompatibleCategory()
      throws InitializationError, NoTestsRemainException {
    CategoryFilter filter= CategoryFilter.include(SlowTests.class);
    BlockJUnit4ClassRunner runner= new BlockJUnit4ClassRunner(
        OneFastOneSlow.class);
    filter.apply(runner);
    assertEquals(1, runner.testCount());
  }

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    assertTrue(problems.isEmpty());
  }


  private List<Throwable> validateAllMethods(Class<?> clazz) {
    try {
      new BlockJUnit4ClassRunner(clazz);
    } catch (InitializationError e) {
      return e.getCauses();
    }
    return Collections.emptyList();
  }

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    @Test public void a() {
    }
  }
  
  @Test(expected=InitializationError.class) public void overloaded() throws InitializationError {
    new BlockJUnit4ClassRunner(Confused.class);
  }

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    @Test public void a() {
    }
  }
  
  @Test(expected=InitializationError.class) public void constructorParameter() throws InitializationError {
    new BlockJUnit4ClassRunner(ConstructorParameter.class);
  }

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