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How to use setScheduler method of org.junit.runners.ParentRunner class

Best junit code snippet using org.junit.runners.ParentRunner.setScheduler

Source:ConcurrentSuite.java

...35	* @throws36	 */37	public static Runner MulThread(Runner runner) {38		if (runner instanceof ParentRunner) {39			// setScheduler(RunnerScheduler scheduler):Sets a scheduler that40			// determines the order and parallelization of children41			// RunnerScheduler:Represents a strategy for scheduling when42			// individual test methods should be run (in serial or parallel)43			((ParentRunner) runner).setScheduler(new RunnerScheduler() {44				private final ExecutorService fService = Executors.newCachedThreadPool();4546				// private final ExecutorService fService =47				// Executors.newFixedThreadPool(10);4849				// Schedule a child statement to run50				public void schedule(Runnable childStatement) {51					this.fService.submit(childStatement);52				}5354				// Override to implement any behavior that must occur after all55				// children have been scheduled56				public void finished() {57					try {58						this.fService.shutdown();59						this.fService.awaitTermination(9223372036854775807L, TimeUnit.NANOSECONDS);60					} catch (InterruptedException e) {61						e.printStackTrace(System.err);62					}63				}64			});65		}66		return runner;67	}6869	public ConcurrentSuite(final Class<?> klass) throws InitializationError {70		// è°ç¨ç¶ç±»ClasspathSuiteæé å½æ°71		// AllDefaultPossibilitiesBuilderæ ¹æ®ä¸åçæµè¯ç±»å®ä¹ï¼@RunWithçä¿¡æ¯ï¼è¿åRunner,ä½¿ç¨èè´£é¾æ¨¡å¼72		super(klass, new AllDefaultPossibilitiesBuilder(true) {73			@Override74			public Runner runnerForClass(Class<?> testClass) throws Throwable {75				List<RunnerBuilder> builders = Arrays.asList(new RunnerBuilder[] { ignoredBuilder(), annotatedBuilder(),76						suiteMethodBuilder(), junit3Builder(), junit4Builder() });77				for (RunnerBuilder each : builders) {78					// æ ¹æ®ä¸åçæµè¯ç±»å®ä¹ï¼@RunWithçä¿¡æ¯ï¼è¿åRunner79					Runner runner = each.safeRunnerForClass(testClass);80					if (runner != null)81						// æ¹æ³çº§å«ï¼å¤çº¿ç¨æ§è¡82						return MulThread(runner);83				}84				return null;85			}86		});8788		// ç±»çº§å«ï¼å¤çº¿ç¨æ§è¡89		setScheduler(new RunnerScheduler() {90			private final ExecutorService fService = Executors.newCachedThreadPool();9192			@Override93			public void schedule(Runnable paramRunnable) {94				// TODO Auto-generated method stub95				fService.submit(paramRunnable);96			}9798			@Override99			public void finished() {100				// TODO Auto-generated method stub101				try {102					fService.shutdown();103					fService.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
...

Source:AbstractPump.java

...28        Reflect.onClass(PumpObjectFactory.class).call("resetContextUnsafeInternal").get();29        cucumberDelegate = newCucumberDelegate(testClass);30    }31    @Override32    public void setScheduler(RunnerScheduler scheduler) {33        cucumberDelegate.setScheduler(scheduler);34    }35    @Override36    public Description getDescription() {37        return cucumberDelegate.getDescription();38    }39    @Override40    public void filter(Filter filter) throws NoTestsRemainException {41        cucumberDelegate.filter(filter);42    }43    @Override44    public void sort(Sorter sorter) {45        cucumberDelegate.sort(sorter);46    }47    @Override...

Source:ParallelComputer.java

...22        return new ParallelComputer(false, true);23    }24    private static Runner parallelize(Runner runner) {25        if (runner instanceof ParentRunner) {26            ((ParentRunner<?>) runner).setScheduler(new RunnerScheduler() {27                private final ExecutorService fService = Executors.newCachedThreadPool();28                public void schedule(Runnable childStatement) {29                    fService.submit(childStatement);30                }31                public void finished() {32                    try {33                        fService.shutdown();34                        fService.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);35                    } catch (InterruptedException e) {36                        e.printStackTrace(System.err);37                    }38                }39            });40        }...

Source:NeodymiumCucumberWrapper.java

...38    {39        return cucumber.childrenInvoker(notifier);40    }41    @Override42    public void setScheduler(RunnerScheduler scheduler)43    {44        cucumber.setScheduler(scheduler);45    }46    // from ParentsRunner47    @Override48    public void run(RunNotifier notifier)49    {50        cucumber.run(notifier);51    }52    @Override53    public void filter(Filter filter) throws NoTestsRemainException54    {55        cucumber.filter(filter);56    }57}...

Source:ParallelParameterized.java

...19import static java.util.concurrent.Executors.newCachedThreadPool;20public class ParallelParameterized extends Parameterized {21  public ParallelParameterized(Class<?> klass) throws Throwable {22    super(klass);23    setScheduler(new ExecutorScheduler(() -> newCachedThreadPool(r -> new Thread(r, "TestRunner-Thread-" + klass))));24    getChildren().forEach(child -> {25      if (child instanceof ParentRunner<?>) {26        ((ParentRunner) child).setScheduler(new ExecutorScheduler(() -> newCachedThreadPool(r -> new Thread(r, "TestRunner-Thread-" + r.toString()))));27      }28    });29  }30}...

Source:ParentRunnerTest.java

...26	@Test27	public void useChildHarvester() throws InitializationError {28		log= "";29		ParentRunner<?> runner= new BlockJUnit4ClassRunner(FruitTest.class);30		runner.setScheduler(new RunnerScheduler() {31			public void schedule(Runnable childStatement) {32				log+= "before ";33				childStatement.run();34				log+= "after ";35			}3637			public void finished() {38				log+= "afterAll ";39			}40		});4142		runner.run(new RunNotifier());43		assertEquals("before apple after before banana after afterAll ", log);44	}
...

setScheduler

Using AI Code Generation

1import org.junit.runner.RunWith;2import org.junit.runners.BlockJUnit4ClassRunner;3import org.junit.runners.model.RunnerScheduler;4@RunWith(CustomRunner.class)5public class TestClass {6}7class CustomRunner extends BlockJUnit4ClassRunner {8    public CustomRunner(Class<?> klass) throws InitializationError {9        super(klass);10        setScheduler(new RunnerScheduler() {11            public void schedule(Runnable childStatement) {12            }13            public void finished() {14            }15        });16    }17}

setScheduler

Using AI Code Generation

1import org.junit.runner.JUnitCore;2import org.junit.runner.Result;3import org.junit.runner.RunWith;4import org.junit.runner.notification.RunNotifier;5import org.junit.runners.ParentRunner;6import org.junit.runners.model.InitializationError;7import rx.Scheduler;8import rx.schedulers.Schedulers;9@RunWith(RxJavaTestRunner.class)10public class RxJavaTestRunner extends ParentRunner {11    public RxJavaTestRunner(Class<?> klass) throws InitializationError {12        super(klass);13    }14    protected void runChild(Object child, RunNotifier notifier) {15        setScheduler(Schedulers.immediate());16        super.runChild(child, notifier);17    }18    public static void main(String[] args) {19        Result result = JUnitCore.runClasses(RxJavaTestRunner.class);20        System.out.println("Run count: " + result.getRunCount());21        System.out.println("Failure count: " + result.getFailureCount());22    }23}

setScheduler

Using AI Code Generation

1@RunWith(Parameterized.class)2public class TestRunner {3    private static final int THREAD_POOL_SIZE = 4;4    private static final int TIMEOUT = 10000;5    private static final int MAX_PARALLEL_TESTS = 4;6    private static final int MAX_CONCURRENT_TESTS = 4;7    private static final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(THREAD_POOL_SIZE);8    public TestRule timeout = new Timeout(TIMEOUT);9    public TestRule watcher = new TestWatcher() {10        protected void starting(Description description) {11            System.out.println("Starting test: " + description.getMethodName());12        }13        protected void succeeded(Description description) {14            System.out.println("Test succeeded: " + description.getMethodName());15        }16        protected void failed(Throwable e, Description description) {17            System.out.println("Test failed: " + description.getMethodName());18        }19    };20    public TestRunner() {21        System.out.println("TestRunner constructor");22    }23    public static void setup() {24        System.out.println("Setup");25    }26    public static void teardown() {27        System.out.println("Teardown");28    }29    public void beforeTest() {30        System.out.println("Before test");31    }32    public void afterTest() {33        System.out.println("After test");34    }35    @Parameterized.Parameters(name = "{index}: {0}")36    public static List<String> data() {37        return Arrays.asList("1", "2", "3", "4", "5", "6", "7", "8", "9", "10");38    }39    public String param;40    public void test() {41        System.out.println("Test: " + param);42    }43    public void test2() {44        System.out.println("Test2: " + param);45    }46    public void test3() {47        System.out.println("Test3: " + param);48    }49    public void test4() {50        System.out.println("Test4: " + param);51    }52    public void test5() {53        System.out.println("Test5: " + param);54    }

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

JUnit Tutorial Chapters:

Here are the detailed JUnit testing chapters to help you get started:

Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
Top Java Unit testing frameworks - Here are the upcoming JUnit automation testing frameworks that you can use in 2023 to boost your unit testing.
What is the JUnit framework
Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
JUnit 5 vs. JUnit 4: Differences - Here is a complete comparison between JUnit 5 and JUnit 4 testing frameworks.
Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.