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

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

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        }
    }


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


    @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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                {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 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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    private CountingRunListener runTestWithParentRunner(Class<?> testClass) throws InitializationError {
        CountingRunListener listener = new CountingRunListener();
        RunNotifier runNotifier = new RunNotifier();
        runNotifier.addListener(listener);
        ParentRunner runner = new BlockJUnit4ClassRunner(testClass);
        runner.run(runNotifier);
        return listener;
    }

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            }
        }


        protected void runWithCompleteAssignment(final Assignments complete)
                throws Throwable {
            new BlockJUnit4ClassRunner(getTestClass().getJavaClass()) {
                @Override
                protected void collectInitializationErrors(
                        List<Throwable> errors) {
                    // do nothing
                }

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