How to use run method of org.junit.runner.Runner class

Best junit code snippet using org.junit.runner.Runner.run

Source:RunNotifier.java

1package org.junit.runner.notification;2import java.util.ArrayList;3import java.util.Arrays;4import java.util.List;5import java.util.concurrent.CopyOnWriteArrayList;6import org.junit.runner.Description;7import org.junit.runner.Result;8import org.junit.runner.notification.RunListener;9public class RunNotifier {10    private final List<RunListener> listeners = new CopyOnWriteArrayList();11    private volatile boolean pleaseStop = false;12    public void addListener(RunListener listener) {13        if (listener != null) {14            this.listeners.add(wrapIfNotThreadSafe(listener));15            return;16        }17        throw new NullPointerException("Cannot add a null listener");18    }19    public void removeListener(RunListener listener) {20        if (listener != null) {21            this.listeners.remove(wrapIfNotThreadSafe(listener));22            return;23        }24        throw new NullPointerException("Cannot remove a null listener");25    }26    /* access modifiers changed from: package-private */27    public RunListener wrapIfNotThreadSafe(RunListener listener) {28        if (listener.getClass().isAnnotationPresent(RunListener.ThreadSafe.class)) {29            return listener;30        }31        return new SynchronizedRunListener(listener, this);32    }33    private abstract class SafeNotifier {34        private final List<RunListener> currentListeners;35        /* access modifiers changed from: protected */36        public abstract void notifyListener(RunListener runListener) throws Exception;37        SafeNotifier(RunNotifier runNotifier) {38            this(runNotifier.listeners);39        }40        SafeNotifier(List<RunListener> currentListeners2) {41            this.currentListeners = currentListeners2;42        }43        /* access modifiers changed from: package-private */44        public void run() {45            int capacity = this.currentListeners.size();46            ArrayList<RunListener> safeListeners = new ArrayList<>(capacity);47            ArrayList<Failure> failures = new ArrayList<>(capacity);48            for (RunListener listener : this.currentListeners) {49                try {50                    notifyListener(listener);51                    safeListeners.add(listener);52                } catch (Exception e) {53                    failures.add(new Failure(Description.TEST_MECHANISM, e));54                }55            }56            RunNotifier.this.fireTestFailures(safeListeners, failures);57        }58    }59    public void fireTestRunStarted(final Description description) {60        new SafeNotifier() {61            /* class org.junit.runner.notification.RunNotifier.AnonymousClass1 */62            /* access modifiers changed from: protected */63            @Override // org.junit.runner.notification.RunNotifier.SafeNotifier64            public void notifyListener(RunListener each) throws Exception {65                each.testRunStarted(description);66            }67        }.run();68    }69    public void fireTestRunFinished(final Result result) {70        new SafeNotifier() {71            /* class org.junit.runner.notification.RunNotifier.AnonymousClass2 */72            /* access modifiers changed from: protected */73            @Override // org.junit.runner.notification.RunNotifier.SafeNotifier74            public void notifyListener(RunListener each) throws Exception {75                each.testRunFinished(result);76            }77        }.run();78    }79    public void fireTestStarted(final Description description) throws StoppedByUserException {80        if (!this.pleaseStop) {81            new SafeNotifier() {82                /* class org.junit.runner.notification.RunNotifier.AnonymousClass3 */83                /* access modifiers changed from: protected */84                @Override // org.junit.runner.notification.RunNotifier.SafeNotifier85                public void notifyListener(RunListener each) throws Exception {86                    each.testStarted(description);87                }88            }.run();89            return;90        }91        throw new StoppedByUserException();92    }93    public void fireTestFailure(Failure failure) {94        fireTestFailures(this.listeners, Arrays.asList(failure));95    }96    /* access modifiers changed from: private */97    /* access modifiers changed from: public */98    private void fireTestFailures(List<RunListener> listeners2, final List<Failure> failures) {99        if (!failures.isEmpty()) {100            new SafeNotifier(listeners2) {101                /* class org.junit.runner.notification.RunNotifier.AnonymousClass4 */102                /* access modifiers changed from: protected */103                @Override // org.junit.runner.notification.RunNotifier.SafeNotifier104                public void notifyListener(RunListener listener) throws Exception {105                    for (Failure each : failures) {106                        listener.testFailure(each);107                    }108                }109            }.run();110        }111    }112    public void fireTestAssumptionFailed(final Failure failure) {113        new SafeNotifier() {114            /* class org.junit.runner.notification.RunNotifier.AnonymousClass5 */115            /* access modifiers changed from: protected */116            @Override // org.junit.runner.notification.RunNotifier.SafeNotifier117            public void notifyListener(RunListener each) throws Exception {118                each.testAssumptionFailure(failure);119            }120        }.run();121    }122    public void fireTestIgnored(final Description description) {123        new SafeNotifier() {124            /* class org.junit.runner.notification.RunNotifier.AnonymousClass6 */125            /* access modifiers changed from: protected */126            @Override // org.junit.runner.notification.RunNotifier.SafeNotifier127            public void notifyListener(RunListener each) throws Exception {128                each.testIgnored(description);129            }130        }.run();131    }132    public void fireTestFinished(final Description description) {133        new SafeNotifier() {134            /* class org.junit.runner.notification.RunNotifier.AnonymousClass7 */135            /* access modifiers changed from: protected */136            @Override // org.junit.runner.notification.RunNotifier.SafeNotifier137            public void notifyListener(RunListener each) throws Exception {138                each.testFinished(description);139            }140        }.run();141    }142    public void pleaseStop() {143        this.pleaseStop = true;144    }145    public void addFirstListener(RunListener listener) {146        if (listener != null) {147            this.listeners.add(0, wrapIfNotThreadSafe(listener));148            return;149        }150        throw new NullPointerException("Cannot add a null listener");151    }152}...

Source:JUnit4ClassRunner.java

1package org.junit.internal.runners;2import java.lang.annotation.Annotation;3import java.lang.reflect.InvocationTargetException;4import java.lang.reflect.Method;5import java.util.Collections;6import java.util.Comparator;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 */119            /* JADX DEBUG: Failed to find minimal casts for resolve overloaded methods, cast all args instead120             method: org.junit.runner.manipulation.Sorter.compare(org.junit.runner.Description, org.junit.runner.Description):int121             arg types: [org.junit.runner.Description, org.junit.runner.Description]122             candidates:123              org.junit.runner.manipulation.Sorter.compare(org.junit.runner.Description, org.junit.runner.Description):int124              MutableMD:(java.lang.Object, java.lang.Object):int125              org.junit.runner.manipulation.Sorter.compare(org.junit.runner.Description, org.junit.runner.Description):int */126            public int compare(Method o1, Method o2) {127                return sorter.compare(JUnit4ClassRunner.this.methodDescription(o1), JUnit4ClassRunner.this.methodDescription(o2));128            }129        });130    }131    /* access modifiers changed from: protected */132    public TestClass getTestClass() {133        return this.testClass;134    }135}...

Source:SingleMethodTest.java

...6import java.util.List;7import junit.framework.JUnit4TestAdapter;8import org.junit.BeforeClass;9import org.junit.Test;10import org.junit.runner.Description;11import org.junit.runner.JUnitCore;12import org.junit.runner.Request;13import org.junit.runner.Result;14import org.junit.runner.RunWith;15import org.junit.runner.Runner;16import org.junit.runner.manipulation.Filter;17import org.junit.runner.manipulation.Filterable;18import org.junit.runner.manipulation.NoTestsRemainException;19import org.junit.runners.Parameterized;20import org.junit.runners.Parameterized.Parameters;21import org.junit.runners.Suite;22import org.junit.runners.Suite.SuiteClasses;23public class SingleMethodTest {24    public static int count;25    static public class OneTimeSetup {26        @BeforeClass27        public static void once() {28            count++;29        }30        @Test31        public void one() {32        }33        @Test34        public void two() {35        }36    }37    @Test38    public void oneTimeSetup() throws Exception {39        count = 0;40        Runner runner = Request.method(OneTimeSetup.class, "one").getRunner();41        Result result = new JUnitCore().run(runner);42        assertEquals(1, count);43        assertEquals(1, result.getRunCount());44    }45    @RunWith(Parameterized.class)46    static public class ParameterizedOneTimeSetup {47        @Parameters48        public static List<Object[]> params() {49            return Arrays.asList(new Object[]{1}, new Object[]{2});50        }51        public ParameterizedOneTimeSetup(int x) {52        }53        @Test54        public void one() {55        }56    }57    @Test58    public void parameterizedFilterToSingleMethod() throws Exception {59        count = 0;60        Runner runner = Request.method(ParameterizedOneTimeSetup.class,61                "one[0]").getRunner();62        Result result = new JUnitCore().run(runner);63        assertEquals(1, result.getRunCount());64    }65    @RunWith(Parameterized.class)66    static public class ParameterizedOneTimeBeforeClass {67        @Parameters68        public static List<Object[]> params() {69            return Arrays.asList(new Object[]{1}, new Object[]{2});70        }71        public ParameterizedOneTimeBeforeClass(int x) {72        }73        @BeforeClass74        public static void once() {75            count++;76        }77        @Test78        public void one() {79        }80    }81    @Test82    public void parameterizedBeforeClass() throws Exception {83        count = 0;84        JUnitCore.runClasses(ParameterizedOneTimeBeforeClass.class);85        assertEquals(1, count);86    }87    @Test88    public void filteringAffectsPlan() throws Exception {89        Runner runner = Request.method(OneTimeSetup.class, "one").getRunner();90        assertEquals(1, runner.testCount());91    }92    @Test93    public void nonexistentMethodCreatesFailure() throws Exception {94        assertEquals(1, new JUnitCore().run(95                Request.method(OneTimeSetup.class, "thisMethodDontExist"))96                .getFailureCount());97    }98    @Test(expected = NoTestsRemainException.class)99    public void filteringAwayEverythingThrowsException() throws NoTestsRemainException {100        Filterable runner = (Filterable) Request.aClass(OneTimeSetup.class).getRunner();101        runner.filter(new Filter() {102            @Override103            public boolean shouldRun(Description description) {104                return false;105            }106            @Override107            public String describe() {108                return null;109            }110        });111    }112    public static class TestOne {113        @Test114        public void a() {115        }116        @Test117        public void b() {118        }119    }120    public static class TestTwo {121        @Test122        public void a() {123        }124        @Test125        public void b() {126        }127    }128    @RunWith(Suite.class)129    @SuiteClasses({TestOne.class, TestTwo.class})130    public static class OneTwoSuite {131    }132    @Test133    public void eliminateUnnecessaryTreeBranches() throws Exception {134        Runner runner = Request.aClass(OneTwoSuite.class).filterWith(135                Description.createTestDescription(TestOne.class, "a"))136                .getRunner();137        Description description = runner.getDescription();138        assertEquals(1, description.getChildren().size());139    }140    public static class HasSuiteMethod {141        @Test142        public void a() {143        }144        @Test145        public void b() {146        }147        public static junit.framework.Test suite() {148            return new JUnit4TestAdapter(HasSuiteMethod.class);149        }150    }151    @Test...

Source:Filter.java

1package org.junit.runner.manipulation;2import org.junit.runner.Description;3import org.junit.runner.Request;4/**5 * The canonical case of filtering is when you want to run a single test method in a class. Rather6 * than introduce runner API just for that one case, JUnit provides a general filtering mechanism.7 * If you want to filter the tests to be run, extend <code>Filter</code> and apply an instance of8 * your filter to the {@link org.junit.runner.Request} before running it (see9 * {@link org.junit.runner.JUnitCore#run(Request)}. Alternatively, apply a <code>Filter</code> to10 * a {@link org.junit.runner.Runner} before running tests (for example, in conjunction with11 * {@link org.junit.runner.RunWith}.12 *13 * @since 4.014 */15public abstract class Filter {16    /**17     * A null <code>Filter</code> that passes all tests through.18     */19    public static final Filter ALL = new Filter() {20        @Override21        public boolean shouldRun(Description description) {22            return true;23        }24        @Override25        public String describe() {26            return "all tests";27        }28        @Override29        public void apply(Object child) throws NoTestsRemainException {30            // do nothing31        }32        @Override33        public Filter intersect(Filter second) {34            return second;35        }36    };37    /**38     * Returns a {@code Filter} that only runs the single method described by39     * {@code desiredDescription}40     */41    public static Filter matchMethodDescription(final Description desiredDescription) {42        return new Filter() {43            @Override44            public boolean shouldRun(Description description) {45                if (description.isTest()) {46                    return desiredDescription.equals(description);47                }48                // explicitly check if any children want to run49                for (Description each : description.getChildren()) {50                    if (shouldRun(each)) {51                        return true;52                    }53                }54                return false;55            }56            @Override57            public String describe() {58                return String.format("Method %s", desiredDescription.getDisplayName());59            }60        };61    }62    /**63     * @param description the description of the test to be run64     * @return <code>true</code> if the test should be run65     */66    public abstract boolean shouldRun(Description description);67    /**68     * Returns a textual description of this Filter69     *70     * @return a textual description of this Filter71     */72    public abstract String describe();73    /**74     * Invoke with a {@link org.junit.runner.Runner} to cause all tests it intends to run75     * to first be checked with the filter. Only those that pass the filter will be run.76     *77     * @param child the runner to be filtered by the receiver78     * @throws NoTestsRemainException if the receiver removes all tests79     */80    public void apply(Object child) throws NoTestsRemainException {81        if (!(child instanceof Filterable)) {82            return;83        }84        Filterable filterable = (Filterable) child;85        filterable.filter(this);86    }87    /**88     * Returns a new Filter that accepts the intersection of the tests accepted89     * by this Filter and {@code second}90     */91    public Filter intersect(final Filter second) {...

Source:GtestComputer.java

1// Copyright 2014 The Chromium Authors. All rights reserved.2// Use of this source code is governed by a BSD-style license that can be3// found in the LICENSE file.4package org.chromium.testing.local;5import org.junit.runner.Computer;6import org.junit.runner.Description;7import org.junit.runner.Runner;8import org.junit.runner.manipulation.Filter;9import org.junit.runner.manipulation.Filterable;10import org.junit.runner.manipulation.NoTestsRemainException;11import org.junit.runner.notification.RunNotifier;12import org.junit.runners.model.InitializationError;13import org.junit.runners.model.RunnerBuilder;14/**15 *  A Computer that logs the start and end of test cases googletest-style.16 */17public class GtestComputer extends Computer {18    private final GtestLogger mLogger;19    public GtestComputer(GtestLogger logger) {20        mLogger = logger;21    }22    /**23     *  A wrapping Runner that logs the start and end of each test case.24     */25    private class GtestSuiteRunner extends Runner implements Filterable {26        private final Runner mRunner;27        public GtestSuiteRunner(Runner contained) {28            mRunner = contained;29        }30        public Description getDescription() {31            return mRunner.getDescription();32        }33        public void run(RunNotifier notifier) {34            long startTimeMillis = System.currentTimeMillis();35            mLogger.testCaseStarted(mRunner.getDescription(),36                    mRunner.getDescription().testCount());37            mRunner.run(notifier);38            mLogger.testCaseFinished(mRunner.getDescription(),39                    mRunner.getDescription().testCount(),40                    System.currentTimeMillis() - startTimeMillis);41        }42        public void filter(Filter filter) throws NoTestsRemainException {43            if (mRunner instanceof Filterable) {44                ((Filterable) mRunner).filter(filter);45            }46        }47    }48    /**49     *  Returns a suite of unit tests with each class runner wrapped by a50     *  GtestSuiteRunner.51     */52    @Override53    public Runner getSuite(final RunnerBuilder builder, Class<?>[] classes)54            throws InitializationError {55        return super.getSuite(56                new RunnerBuilder() {57                    @Override58                    public Runner runnerForClass(Class<?> testClass) throws Throwable {59                        return new GtestSuiteRunner(builder.runnerForClass(testClass));60                    }61                }, classes);62    }63}...

Source:Runner.java

1package org.junit.runner;2import org.junit.runner.notification.RunNotifier;3/**4 * A <code>Runner</code> runs tests and notifies a {@link org.junit.runner.notification.RunNotifier}5 * of significant events as it does so. You will need to subclass <code>Runner</code>6 * when using {@link org.junit.runner.RunWith} to invoke a custom runner. When creating7 * a custom runner, in addition to implementing the abstract methods here you must8 * also provide a constructor that takes as an argument the {@link Class} containing9 * the tests.10 *11 * <p>The default runner implementation guarantees that the instances of the test case12 * class will be constructed immediately before running the test and that the runner13 * will retain no reference to the test case instances, generally making them14 * available for garbage collection.15 *16 * @see org.junit.runner.Description17 * @see org.junit.runner.RunWith18 * @since 4.019 */20public abstract class Runner implements Describable {21    /*22     * (non-Javadoc)23     * @see org.junit.runner.Describable#getDescription()24     */25    public abstract Description getDescription();26    /**27     * Run the tests for this runner.28     *29     * @param notifier will be notified of events while tests are being run--tests being30     * started, finishing, and failing31     */32    public abstract void run(RunNotifier notifier);33    /**34     * @return the number of tests to be run by the receiver35     */36    public int testCount() {37        return getDescription().testCount();38    }39}...

Source:NonExecutingRunner.java

1package androidx.test.internal.runner;2import java.util.List;3import org.junit.runner.Description;4import org.junit.runner.Runner;5import org.junit.runner.manipulation.Filter;6import org.junit.runner.manipulation.Filterable;7import org.junit.runner.manipulation.NoTestsRemainException;8import org.junit.runner.notification.RunNotifier;9class NonExecutingRunner extends Runner implements Filterable {10    private final Runner runner;11    NonExecutingRunner(Runner runner2) {12        this.runner = runner2;13    }14    @Override // org.junit.runner.Describable, org.junit.runner.Runner15    public Description getDescription() {16        return this.runner.getDescription();17    }18    @Override // org.junit.runner.Runner19    public void run(RunNotifier notifier) {20        generateListOfTests(notifier, getDescription());21    }22    @Override // org.junit.runner.manipulation.Filterable23    public void filter(Filter filter) throws NoTestsRemainException {24        filter.apply(this.runner);25    }26    private void generateListOfTests(RunNotifier runNotifier, Description description) {27        List<Description> children = description.getChildren();28        if (children.isEmpty()) {29            runNotifier.fireTestStarted(description);30            runNotifier.fireTestFinished(description);31            return;32        }33        for (Description child : children) {34            generateListOfTests(runNotifier, child);35        }36    }37}...

Source:AndroidJUnit4.java

1package androidx.test.runner;2import org.junit.runner.Description;3import org.junit.runner.Runner;4import org.junit.runner.manipulation.Filter;5import org.junit.runner.manipulation.Filterable;6import org.junit.runner.manipulation.NoTestsRemainException;7import org.junit.runner.notification.RunNotifier;8@Deprecated9public final class AndroidJUnit4 extends Runner implements Filterable {10    private final Runner delegate;11    @Override // org.junit.runner.Describable, org.junit.runner.Runner12    public Description getDescription() {13        return this.delegate.getDescription();14    }15    @Override // org.junit.runner.Runner16    public void run(RunNotifier runNotifier) {17        this.delegate.run(runNotifier);18    }19    @Override // org.junit.runner.manipulation.Filterable20    public void filter(Filter filter) throws NoTestsRemainException {21        ((Filterable) this.delegate).filter(filter);22    }23}...

run

Using AI Code Generation

1import org.junit.runner.JUnitCore;2import org.junit.runner.Result;3import org.junit.runner.notification.Failure;4public class TestRunner {5   public static void main(String[] args) {6      Result result = JUnitCore.runClasses(TestJunit.class);7      for (Failure failure : result.getFailures()) {8         System.out.println(failure.toString());9      }10      System.out.println(result.wasSuccessful());11   }12}131) testAdd(org.TestJunit)14	at org.TestJunit.testAdd(TestJunit.java:12)15	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)16	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)17	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)18	at java.lang.reflect.Method.invoke(Method.java:498)19	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)20	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)21	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)22	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)23	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)24	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)25	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)26	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)27	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)28	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)29	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)30	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)31	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)32	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)33	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)34	at TestRunner.main(TestRunner.java:7)

JUnit Tutorial:

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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.