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How to use Filter class of org.junit.runner.manipulation package

Best junit code snippet using org.junit.runner.manipulation.Filter

Source:JUnit4ClassRunner.java

...7import java.util.Iterator;8import java.util.List;9import org.junit.runner.Description;10import org.junit.runner.Runner;11import org.junit.runner.manipulation.Filter;12import org.junit.runner.manipulation.Filterable;13import org.junit.runner.manipulation.NoTestsRemainException;14import org.junit.runner.manipulation.Sortable;15import org.junit.runner.manipulation.Sorter;16import org.junit.runner.notification.Failure;17import org.junit.runner.notification.RunNotifier;18@Deprecated19public class JUnit4ClassRunner extends Runner implements Filterable, Sortable {20    private TestClass testClass;21    private final List<Method> testMethods = getTestMethods();22    public JUnit4ClassRunner(Class<?> klass) throws InitializationError {23        this.testClass = new TestClass(klass);24        validate();25    }26    /* access modifiers changed from: protected */27    public List<Method> getTestMethods() {28        return this.testClass.getTestMethods();29    }30    /* access modifiers changed from: protected */31    public void validate() throws InitializationError {32        MethodValidator methodValidator = new MethodValidator(this.testClass);33        methodValidator.validateMethodsForDefaultRunner();34        methodValidator.assertValid();35    }36    @Override // org.junit.runner.Runner37    public void run(final RunNotifier notifier) {38        new ClassRoadie(notifier, this.testClass, getDescription(), new Runnable() {39            /* class org.junit.internal.runners.JUnit4ClassRunner.AnonymousClass1 */40            public void run() {41                JUnit4ClassRunner.this.runMethods(notifier);42            }43        }).runProtected();44    }45    /* access modifiers changed from: protected */46    public void runMethods(RunNotifier notifier) {47        for (Method method : this.testMethods) {48            invokeTestMethod(method, notifier);49        }50    }51    @Override // org.junit.runner.Describable, org.junit.runner.Runner52    public Description getDescription() {53        Description spec = Description.createSuiteDescription(getName(), classAnnotations());54        for (Method method : this.testMethods) {55            spec.addChild(methodDescription(method));56        }57        return spec;58    }59    /* access modifiers changed from: protected */60    public Annotation[] classAnnotations() {61        return this.testClass.getJavaClass().getAnnotations();62    }63    /* access modifiers changed from: protected */64    public String getName() {65        return getTestClass().getName();66    }67    /* access modifiers changed from: protected */68    public Object createTest() throws Exception {69        return getTestClass().getConstructor().newInstance(new Object[0]);70    }71    /* access modifiers changed from: protected */72    public void invokeTestMethod(Method method, RunNotifier notifier) {73        Description description = methodDescription(method);74        try {75            new MethodRoadie(createTest(), wrapMethod(method), notifier, description).run();76        } catch (InvocationTargetException e) {77            testAborted(notifier, description, e.getCause());78        } catch (Exception e2) {79            testAborted(notifier, description, e2);80        }81    }82    private void testAborted(RunNotifier notifier, Description description, Throwable e) {83        notifier.fireTestStarted(description);84        notifier.fireTestFailure(new Failure(description, e));85        notifier.fireTestFinished(description);86    }87    /* access modifiers changed from: protected */88    public TestMethod wrapMethod(Method method) {89        return new TestMethod(method, this.testClass);90    }91    /* access modifiers changed from: protected */92    public String testName(Method method) {93        return method.getName();94    }95    /* access modifiers changed from: protected */96    public Description methodDescription(Method method) {97        return Description.createTestDescription(getTestClass().getJavaClass(), testName(method), testAnnotations(method));98    }99    /* access modifiers changed from: protected */100    public Annotation[] testAnnotations(Method method) {101        return method.getAnnotations();102    }103    @Override // org.junit.runner.manipulation.Filterable104    public void filter(Filter filter) throws NoTestsRemainException {105        Iterator<Method> iter = this.testMethods.iterator();106        while (iter.hasNext()) {107            if (!filter.shouldRun(methodDescription(iter.next()))) {108                iter.remove();109            }110        }111        if (this.testMethods.isEmpty()) {112            throw new NoTestsRemainException();113        }114    }115    @Override // org.junit.runner.manipulation.Sortable116    public void sort(final Sorter sorter) {117        Collections.sort(this.testMethods, new Comparator<Method>() {118            /* class org.junit.internal.runners.JUnit4ClassRunner.AnonymousClass2 */...

Source:FilterAdapter.java

...22import java.rmi.RemoteException;23import java.util.HashMap;24import java.util.Map;25import org.junit.runner.Description;26import org.junit.runner.manipulation.Filterable;27import org.junit.runner.manipulation.NoTestsRemainException;28/**29 * JUnit Filter around remote filter so that is again usable by JUnit runner on the remote side30 */31public class FilterAdapter extends org.junit.runner.manipulation.Filter32{33    private final Filter delegate;34    private final Map<Description, Boolean> shouldRunCache = new HashMap<>();35    public FilterAdapter(Filter delegate)36    {37        this.delegate = delegate;38    }39    public void apply(Object child) throws NoTestsRemainException40    {41        if (!(child instanceof Filterable)) {42            return;43        }44        Filterable filterable = (Filterable) child;45        filterable.filter(this);46    }47    @Override public org.junit.runner.manipulation.Filter intersect(final org.junit.runner.manipulation.Filter second)48    {49        if (second == this || second == ALL) {50            return this;51        }52        final org.junit.runner.manipulation.Filter first = this;53        return new org.junit.runner.manipulation.Filter() {54            @Override55            public boolean shouldRun(Description description) {56                return first.shouldRun(description)57                        && second.shouldRun(description);58            }59            @Override60            public String describe() {61                return first.describe() + " and " + second.describe();62            }63        };64    }65    @Override public boolean shouldRun(Description description)66    {67        try...

Source:JUnit4TestAdapter.java

...4import org.junit.runner.Describable;5import org.junit.runner.Description;6import org.junit.runner.Request;7import org.junit.runner.Runner;8import org.junit.runner.manipulation.Filter;9import org.junit.runner.manipulation.Filterable;10import org.junit.runner.manipulation.Orderer;11import org.junit.runner.manipulation.InvalidOrderingException;12import org.junit.runner.manipulation.NoTestsRemainException;13import org.junit.runner.manipulation.Orderable;14import org.junit.runner.manipulation.Sorter;15/**16 * The JUnit4TestAdapter enables running JUnit-4-style tests using a JUnit-3-style test runner.17 *18 * <p> To use it, add the following to a test class:19 * <pre>20 * public static Test suite() {21 * return new JUnit4TestAdapter(<em>YourJUnit4TestClass</em>.class);22 * }23 * </pre>24 */25public class JUnit4TestAdapter implements Test, Filterable, Orderable, Describable {26    private final Class<?> fNewTestClass;27    private final Runner fRunner;28    private final JUnit4TestAdapterCache fCache;29    public JUnit4TestAdapter(Class<?> newTestClass) {30        this(newTestClass, JUnit4TestAdapterCache.getDefault());31    }32    public JUnit4TestAdapter(final Class<?> newTestClass, JUnit4TestAdapterCache cache) {33        fCache = cache;34        fNewTestClass = newTestClass;35        fRunner = Request.classWithoutSuiteMethod(newTestClass).getRunner();36    }37    public int countTestCases() {38        return fRunner.testCount();39    }40    public void run(TestResult result) {41        fRunner.run(fCache.getNotifier(result, this));42    }43    // reflective interface for Eclipse44    public List<Test> getTests() {45        return fCache.asTestList(getDescription());46    }47    // reflective interface for Eclipse48    public Class<?> getTestClass() {49        return fNewTestClass;50    }51    public Description getDescription() {52        Description description = fRunner.getDescription();53        return removeIgnored(description);54    }55    private Description removeIgnored(Description description) {56        if (isIgnored(description)) {57            return Description.EMPTY;58        }59        Description result = description.childlessCopy();60        for (Description each : description.getChildren()) {61            Description child = removeIgnored(each);62            if (!child.isEmpty()) {63                result.addChild(child);64            }65        }66        return result;67    }68    private boolean isIgnored(Description description) {69        return description.getAnnotation(Ignore.class) != null;70    }71    @Override72    public String toString() {73        return fNewTestClass.getName();74    }75    public void filter(Filter filter) throws NoTestsRemainException {76        filter.apply(fRunner);77    }78    public void sort(Sorter sorter) {79        sorter.apply(fRunner);80    }81    /**82     * {@inheritDoc}83     *84     * @since 4.1385     */86    public void order(Orderer orderer) throws InvalidOrderingException {87        orderer.apply(fRunner);88    }89}...

Source:Filter.java

1package org.junit.runner.manipulation;2import java.util.Iterator;3import org.junit.runner.Description;4public abstract class Filter {5    public static final Filter ALL = new Filter() {6        /* class org.junit.runner.manipulation.Filter.AnonymousClass1 */7        @Override // org.junit.runner.manipulation.Filter8        public boolean shouldRun(Description description) {9            return true;10        }11        @Override // org.junit.runner.manipulation.Filter12        public String describe() {13            return "all tests";14        }15        @Override // org.junit.runner.manipulation.Filter16        public void apply(Object child) throws NoTestsRemainException {17        }18        @Override // org.junit.runner.manipulation.Filter19        public Filter intersect(Filter second) {20            return second;21        }22    };23    public abstract String describe();24    public abstract boolean shouldRun(Description description);25    public static Filter matchMethodDescription(final Description desiredDescription) {26        return new Filter() {27            /* class org.junit.runner.manipulation.Filter.AnonymousClass2 */28            @Override // org.junit.runner.manipulation.Filter29            public boolean shouldRun(Description description) {30                if (description.isTest()) {31                    return Description.this.equals(description);32                }33                Iterator<Description> it = description.getChildren().iterator();34                while (it.hasNext()) {35                    if (shouldRun(it.next())) {36                        return true;37                    }38                }39                return false;40            }41            @Override // org.junit.runner.manipulation.Filter42            public String describe() {43                return String.format("Method %s", Description.this.getDisplayName());44            }45        };46    }47    public void apply(Object child) throws NoTestsRemainException {48        if (child instanceof Filterable) {49            ((Filterable) child).filter(this);50        }51    }52    public Filter intersect(final Filter second) {53        if (second == this || second == ALL) {54            return this;55        }56        return new Filter() {57            /* class org.junit.runner.manipulation.Filter.AnonymousClass3 */58            @Override // org.junit.runner.manipulation.Filter59            public boolean shouldRun(Description description) {60                return this.shouldRun(description) && second.shouldRun(description);61            }62            @Override // org.junit.runner.manipulation.Filter63            public String describe() {64                return this.describe() + " and " + second.describe();65            }66        };67    }68}...

Source:Filter$3.java

1class org.junit.runner.manipulation.Filter$3 extends org.junit.runner.manipulation.Filter {2  final org.junit.runner.manipulation.Filter val$first;3  final org.junit.runner.manipulation.Filter val$second;4  final org.junit.runner.manipulation.Filter this$0;5  org.junit.runner.manipulation.Filter$3(org.junit.runner.manipulation.Filter, org.junit.runner.manipulation.Filter, org.junit.runner.manipulation.Filter);6  public boolean shouldRun(org.junit.runner.Description);7  public java.lang.String describe();8}...

Source:Filter$1.java

1final class org.junit.runner.manipulation.Filter$1 extends org.junit.runner.manipulation.Filter {2  org.junit.runner.manipulation.Filter$1();3  public boolean shouldRun(org.junit.runner.Description);4  public java.lang.String describe();5  public void apply(java.lang.Object) throws org.junit.runner.manipulation.NoTestsRemainException;6  public org.junit.runner.manipulation.Filter intersect(org.junit.runner.manipulation.Filter);7}...

Filter

Using AI Code Generation

1import org.junit.runner.JUnitCore;2import org.junit.runner.Request;3import org.junit.runner.Result;4import org.junit.runner.manipulation.Filter;5import org.junit.runner.manipulation.NoTestsRemainException;6import org.junit.runner.manipulation.Filterable;7import org.junit.runner.Description;8import org.junit.runner.RunWith;9import org.junit.runners.Suite;10import org.junit.runners.Suite.SuiteClasses;11import org.junit.runners.model.InitializationError;12import org.junit.runners.model.RunnerBuilder;13import java.util.ArrayList;14import java.util.List;15public class JUnitRunner extends Suite {16    public JUnitRunner(Class<?> klass, RunnerBuilder builder) throws InitializationError {17        super(klass, builder);18        List<Runner> runners = new ArrayList<Runner>();19        for (Class<?> c : klass.getClasses()) {20            if (c.isAnnotationPresent(SuiteClasses.class)) {21                runners.add(new JUnitRunner(c, builder));22            } else {23                runners.add(new JUnit4ClassRunner(c));24            }25        }26        setRunners(runners);27    }28    protected void runChild(Runner runner, RunNotifier notifier) {29        if (runner instanceof Filterable) {30            Request request = Request.aClass(runner.getDescription().getTestClass());31            Filter filter = request.getFilter();32            try {33                ((Filterable) runner).filter(filter);34            } catch (NoTestsRemainException e) {35                return;36            }37        }38        super.runChild(runner, notifier);39    }40}41@RunWith(JUnitRunner.class)42public class TestClass {43    public static class TestClass1 {44        public void test1() {45            System.out.println("test1");46        }47    }48    public static class TestClass2 {49        public void test2() {50            System.out.println("test2");51        }52    }53}

Filter

Using AI Code Generation

1import org.junit.runner.manipulation.Filter;2import org.junit.runner.manipulation.NoTestsRemainException;3import org.junit.runner.Description;4import org.junit.runner.RunWith;5import org.junit.runners.Suite;6import org.junit.runners.Suite.SuiteClasses;7@RunWith(Suite.class)8@SuiteClasses({ TestClass1.class, TestClass2.class })9public class TestSuite {10    public static void setUpClass() throws Exception {11        Filter filter = new Filter() {12            public boolean shouldRun(Description description) {13                return description.getMethodName().equals("testMethod1");14            }15            public String describe() {16                return "filtering method testMethod1";17            }18        };19        try {20            filter.apply(JUnitCore.runClasses(TestClass1.class));21            filter.apply(JUnitCore.runClasses(TestClass2.class));22        } catch (NoTestsRemainException e) {23            e.printStackTrace();24        }25    }26}

Filter

Using AI Code Generation

1import org.junit.runner.manipulation.Filter;2import org.junit.runner.Description;3public class MyFilter extends Filter {4    public String describe() {5        return "MyFilter";6    }7    public boolean shouldRun(Description description) {8        return true;9    }10}11import org.junit.runner.manipulation.FilterFactory;12import org.junit.runner.manipulation.Filter;13import org.junit.runner.Description;14public class MyFilterFactory implements FilterFactory {15    public Filter createFilter(FilterFactoryParams params) {16        return new MyFilter();17    }18}19import org.junit.runner.manipulation.FilterFactoryParams;20public class MyFilterFactoryParams implements FilterFactoryParams {21    public String getFilterSpec() {22        return "MyFilter";23    }24}25import org.junit.runner.manipulation.Filterable;26import org.junit.runner.Request;27import org.junit.runner.Runner;28public class MyFilterable implements Filterable {29    public void filter(Filter filter) throws NoTestsRemainException {30    }31}32import org.junit.runner.manipulation.NoTestsRemainException;33public class MyNoTestsRemainException extends NoTestsRemainException {34    public MyNoTestsRemainException() {35    }36    public MyNoTestsRemainException(String message) {37        super(message);38    }39}40import org.junit.runner.manipulation.Sortable;41import org.junit.runner.manipulation.Sorter;42public class MySortable implements Sortable {43    public void sort(Sorter sorter) {44    }45}46import org.junit.runner.manipulation.Sorter;47public class MySorter extends Sorter {48    public void apply(Object child) {

Source: How can I avoid Java code in JSP files, using JSP 2?

1public class ScheduledThreadPoolExample {23    public static void main(String[] args) throws InterruptedException {4        ScheduledExecutorService executorService = Executors.newScheduledThreadPool(5);5        executorService.scheduleAtFixedRate(() -> System.out.println("process task."),6                0, 1, TimeUnit.SECONDS);78        TimeUnit.SECONDS.sleep(10);9        executorService.shutdown();10        executorService.awaitTermination(1, TimeUnit.DAYS);11    }1213}14

Source:How can I avoid Java code in JSP files, using JSP 2?

public class ScheduledThreadPoolExample {

    public static void main(String[] args) throws InterruptedException {
        ScheduledExecutorService executorService = Executors.newScheduledThreadPool(5);
        executorService.scheduleAtFixedRate(() -> System.out.println("process task."),
                0, 1, TimeUnit.SECONDS);

        TimeUnit.SECONDS.sleep(10);
        executorService.shutdown();
        executorService.awaitTermination(1, TimeUnit.DAYS);
    }

}

Source: How do servlets work? Instantiation, sessions, shared variables and multithreading

1final List<Runnable> tasks = ...; //or any other functional interface2tasks.stream().parallel().forEach(Runnable::run) // Uses default pool34//alternatively to specify parallelism 5new ForkJoinPool(15).submit(6          () -> tasks.stream().parallel().forEach(Runnable::run) 7    ).get();8

Source:How do servlets work? Instantiation, sessions, shared variables and multithreading

final List<Runnable> tasks = ...; //or any other functional interface
tasks.stream().parallel().forEach(Runnable::run) // Uses default pool

//alternatively to specify parallelism 
new ForkJoinPool(15).submit(
          () -> tasks.stream().parallel().forEach(Runnable::run) 
    ).get();

Source: How to implement REST token-based authentication with JAX-RS and Jersey

12ExecutorService WORKER_THREAD_POOL 3  = Executors.newFixedThreadPool(10);4CountDownLatch latch = new CountDownLatch(2);5for (int i = 0; i < 2; i++) {6    WORKER_THREAD_POOL.submit(() -> {7        try {8            // doSomething();9            latch.countDown();10        } catch (InterruptedException e) {11            Thread.currentThread().interrupt();12        }13    });14}1516// wait for the latch to be decremented by the two remaining threads17latch.await();18

Source:How to implement REST token-based authentication with JAX-RS and Jersey


ExecutorService WORKER_THREAD_POOL 
  = Executors.newFixedThreadPool(10);
CountDownLatch latch = new CountDownLatch(2);
for (int i = 0; i < 2; i++) {
    WORKER_THREAD_POOL.submit(() -> {
        try {
            // doSomething();
            latch.countDown();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    });
}

// wait for the latch to be decremented by the two remaining threads
latch.await();

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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.