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How to use Annotation Type RunWith class of org.junit.runner package

Best junit code snippet using org.junit.runner.Annotation Type RunWith

Source:AbstractMultiTestRunner.java

1/*2 * Copyright 2012 the original author or authors.3 *4 * Licensed under the Apache License, Version 2.0 (the "License");5 * you may not use this file except in compliance with the License.6 * You may obtain a copy of the License at7 *8 *      http://www.apache.org/licenses/LICENSE-2.09 *10 * Unless required by applicable law or agreed to in writing, software11 * distributed under the License is distributed on an "AS IS" BASIS,12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13 * See the License for the specific language governing permissions and14 * limitations under the License.15 */16package org.gradle.integtests.fixtures;17import org.gradle.api.Nullable;18import org.gradle.internal.UncheckedException;19import org.junit.runner.Description;20import org.junit.runner.RunWith;21import org.junit.runner.Runner;22import org.junit.runner.manipulation.Filter;23import org.junit.runner.manipulation.Filterable;24import org.junit.runner.manipulation.NoTestsRemainException;25import org.junit.runner.notification.Failure;26import org.junit.runner.notification.RunListener;27import org.junit.runner.notification.RunNotifier;28import org.junit.runners.BlockJUnit4ClassRunner;29import org.junit.runners.Suite;30import org.junit.runners.model.InitializationError;31import org.junit.runners.model.RunnerBuilder;32import java.lang.annotation.Annotation;33import java.lang.reflect.InvocationTargetException;34import java.util.*;35/**36 * A base class for those test runners which execute a test multiple times.37 */38public abstract class AbstractMultiTestRunner extends Runner implements Filterable {39    protected final Class<?> target;40    private final List<Execution> executions = new ArrayList<Execution>();41    private Description description;42    private Description templateDescription;43    protected AbstractMultiTestRunner(Class<?> target) {44        this.target = target;45    }46    @Override47    public Description getDescription() {48        initDescription();49        return description;50    }51    @Override52    public void run(RunNotifier notifier) {53        initDescription();54        for (Execution execution : executions) {55            execution.run(notifier);56        }57    }58    public void filter(Filter filter) throws NoTestsRemainException {59        initExecutions();60        for (Execution execution : executions) {61            execution.filter(filter);62        }63        invalidateDescription();64    }65    private void initExecutions() {66        if (executions.isEmpty()) {67            try {68                Runner descriptionProvider = createRunnerFor(Arrays.asList(target), Collections.<Filter>emptyList());69                templateDescription = descriptionProvider.getDescription();70            } catch (InitializationError initializationError) {71                throw UncheckedException.throwAsUncheckedException(initializationError);72            }73            createExecutions();74            for (Execution execution : executions) {75                execution.init(target, templateDescription);76            }77        }78    }79    private void initDescription() {80        initExecutions();81        if (description == null) {82            description = Description.createSuiteDescription(target);83            for (Execution execution : executions) {84                execution.addDescriptions(description);85            }86        }87    }88    private void invalidateDescription() {89        description = null;90        templateDescription = null;91    }92    protected abstract void createExecutions();93    protected void add(Execution execution) {94        executions.add(execution);95    }96    private static Runner createRunnerFor(List<? extends Class<?>> targetClasses, final List<Filter> filters) throws InitializationError {97        RunnerBuilder runnerBuilder = new RunnerBuilder() {98            @Override99            public Runner runnerForClass(Class<?> testClass) throws Throwable {100                for (Class<?> candidate = testClass; candidate != null; candidate = candidate.getSuperclass()) {101                    RunWith runWith = candidate.getAnnotation(RunWith.class);102                    if (runWith != null && !AbstractMultiTestRunner.class.isAssignableFrom(runWith.value())) {103                        try {104                            Runner r = (Runner) runWith.value().getConstructors()[0].newInstance(testClass);105                            return filter(r);106                        } catch (InvocationTargetException e) {107                            throw e.getTargetException();108                        }109                    }110                }111                return filter(new BlockJUnit4ClassRunner(testClass));112            }113            //we need to filter at the level child runners because the suite is not doing the right thing here114            private Runner filter(Runner r) {115                for (Filter filter : filters) {116                    try {117                        ((Filterable)r).filter(filter);118                    } catch (NoTestsRemainException e) {119                        //ignore120                    }121                }122                return r;123            }124        };125        return new Suite(runnerBuilder, targetClasses.toArray(new Class<?>[targetClasses.size()]));126    }127    protected static abstract class Execution implements Filterable {128        protected Class<?> target;129        private Description templateDescription;130        private final Map<Description, Description> descriptionTranslations = new HashMap<Description, Description>();131        private final Set<Description> enabledTests = new LinkedHashSet<Description>();132        private final Set<Description> disabledTests = new LinkedHashSet<Description>();133        private final List<Filter> filters = new LinkedList<Filter>();134        final void init(Class<?> target, Description templateDescription) {135            this.target = target;136            this.templateDescription = templateDescription;137        }138        private Runner createExecutionRunner() throws InitializationError {139            List<? extends Class<?>> targetClasses = loadTargetClasses();140            return createRunnerFor(targetClasses, filters);141        }142        final void addDescriptions(Description parent) {143            map(templateDescription, parent);144        }145        final void run(final RunNotifier notifier) {146            RunNotifier nested = new RunNotifier();147            NestedRunListener nestedListener = new NestedRunListener(notifier);148            nested.addListener(nestedListener);149            try {150                runEnabledTests(nested);151            } finally {152                nestedListener.cleanup();153            }154            for (Description disabledTest : disabledTests) {155                nested.fireTestStarted(disabledTest);156                nested.fireTestIgnored(disabledTest);157            }158        }159        private void runEnabledTests(RunNotifier nested) {160            if (enabledTests.isEmpty()) {161                return;162            }163            Runner runner;164            try {165                runner = createExecutionRunner();166            } catch (Throwable t) {167                runner = new CannotExecuteRunner(getDisplayName(), target, t);168            }169            try {170                if (!disabledTests.isEmpty()) {171                    ((Filterable) runner).filter(new Filter() {172                        @Override173                        public boolean shouldRun(Description description) {174                            return !disabledTests.contains(description);175                        }176                        @Override177                        public String describe() {178                            return "disabled tests";179                        }180                    });181                }182            } catch (NoTestsRemainException e) {183                return;184            }185            runner.run(nested);186        }187        private Description translateDescription(Description description) {188            return descriptionTranslations.containsKey(description) ? descriptionTranslations.get(description) : description;189        }190        public void filter(Filter filter) throws NoTestsRemainException {191            filters.add(filter);192            for (Map.Entry<Description, Description> entry : descriptionTranslations.entrySet()) {193                if (!filter.shouldRun(entry.getKey())) {194                    enabledTests.remove(entry.getValue());195                    disabledTests.remove(entry.getValue());196                }197            }198        }199        protected void before() {200        }201        protected void after() {202        }203        private void map(Description source, Description parent) {204            for (Description child : source.getChildren()) {205                Description mappedChild;206                if (child.getMethodName() != null) {207                    mappedChild = Description.createSuiteDescription(String.format("%s [%s](%s)", child.getMethodName(), getDisplayName(), child.getClassName()));208                    parent.addChild(mappedChild);209                    if (!isTestEnabled(new TestDescriptionBackedTestDetails(source, child))) {210                        disabledTests.add(child);211                    } else {212                        enabledTests.add(child);213                    }214                } else {215                    mappedChild = Description.createSuiteDescription(child.getClassName());216                }217                descriptionTranslations.put(child, mappedChild);218                map(child, parent);219            }220        }221        /**222         * Returns a display name for this execution. Used in the JUnit descriptions for test execution.223         */224        protected abstract String getDisplayName();225        /**226         * Returns true if the given test should be executed, false if it should be ignored. Default is true.227         */228        protected boolean isTestEnabled(TestDetails testDetails) {229            return true;230        }231        /**232         * Checks that this execution can be executed, throwing an exception if not.233         */234        protected void assertCanExecute() {235        }236        /**237         * Loads the target classes for this execution. Default is the target class that this runner was constructed with.238         */239        protected List<? extends Class<?>> loadTargetClasses() {240            return Collections.singletonList(target);241        }242        private static class CannotExecuteRunner extends Runner {243            private final Description description;244            private final Throwable failure;245            public CannotExecuteRunner(String displayName, Class<?> testClass, Throwable failure) {246                description = Description.createSuiteDescription(String.format("%s(%s)", displayName, testClass.getName()));247                this.failure = failure;248            }249            @Override250            public Description getDescription() {251                return description;252            }253            @Override254            public void run(RunNotifier notifier) {255                Description description = getDescription();256                notifier.fireTestStarted(description);257                notifier.fireTestFailure(new Failure(description, failure));258                notifier.fireTestFinished(description);259            }260        }261        private class NestedRunListener extends RunListener {262            private final RunNotifier notifier;263            boolean started;264            boolean complete;265            public NestedRunListener(RunNotifier notifier) {266                this.notifier = notifier;267            }268            @Override269            public void testStarted(Description description) {270                Description translated = translateDescription(description);271                notifier.fireTestStarted(translated);272                if (!started && !complete) {273                    try {274                        assertCanExecute();275                        started = true;276                        before();277                    } catch (Throwable t) {278                        notifier.fireTestFailure(new Failure(translated, t));279                    }280                }281            }282            @Override283            public void testFailure(Failure failure) {284                Description translated = translateDescription(failure.getDescription());285                notifier.fireTestFailure(new Failure(translated, failure.getException()));286            }287            @Override288            public void testAssumptionFailure(Failure failure) {289                Description translated = translateDescription(failure.getDescription());290                notifier.fireTestAssumptionFailed(new Failure(translated, failure.getException()));291            }292            @Override293            public void testIgnored(Description description) {294                Description translated = translateDescription(description);295                notifier.fireTestIgnored(translated);296            }297            @Override298            public void testFinished(Description description) {299                Description translated = translateDescription(description);300                notifier.fireTestFinished(translated);301            }302            public void cleanup() {303                if (started) {304                    after();305                }306                // Prevent further tests (ignored) from triggering start actions307                complete = true;308            }309        }310    }311    public interface TestDetails {312        /**313         * Locates the given annotation for the test. May be inherited from test class.314         */315        @Nullable316        <A extends Annotation> A getAnnotation(Class<A> type);317    }318    private static class TestDescriptionBackedTestDetails implements TestDetails {319        private final Description parent;320        private final Description test;321        private TestDescriptionBackedTestDetails(Description parent, Description test) {322            this.parent = parent;323            this.test = test;324        }325        @Override326        public String toString() {327            return test.toString();328        }329        public <A extends Annotation> A getAnnotation(Class<A> type) {330            A annotation = test.getAnnotation(type);331            if (annotation != null) {332                return annotation;333            }334            return parent.getAnnotation(type);335        }336    }337}...

Source:Remote.java

1/**2 * Copyright (C) 2016 DataStax Inc.3 *4 * Licensed to the Apache Software Foundation (ASF) under one5 * or more contributor license agreements.  See the NOTICE file6 * distributed with this work for additional information7 * regarding copyright ownership.  The ASF licenses this file8 * to you under the Apache License, Version 2.0 (the9 * "License"); you may not use this file except in compliance10 * with the License.  You may obtain a copy of the License at11 *12 *   http://www.apache.org/licenses/LICENSE-2.013 *14 * Unless required by applicable law or agreed to in writing,15 * software distributed under the License is distributed on an16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY17 * KIND, either express or implied.  See the License for the18 * specific language governing permissions and limitations19 * under the License.20 */21package com.datastax.junit.remote;22import java.lang.annotation.ElementType;23import java.lang.annotation.Retention;24import java.lang.annotation.RetentionPolicy;25import java.lang.annotation.Target;26import java.rmi.Naming;27import java.rmi.RemoteException;28import org.junit.runner.Description;29import org.junit.runner.Runner;30import org.junit.runner.manipulation.Filter;31import org.junit.runner.manipulation.Filterable;32import org.junit.runner.manipulation.NoTestsRemainException;33import org.junit.runner.notification.RunNotifier;34import org.junit.runners.BlockJUnit4ClassRunner;35import org.junit.runners.model.InitializationError;36import org.slf4j.Logger;37import org.slf4j.LoggerFactory;38import com.healthmarketscience.rmiio.RemoteOutputStream;39import com.healthmarketscience.rmiio.SimpleRemoteOutputStream;40import org.unitils.util.AnnotationUtils;41/**42 * Run JUnit tests remotely, in another JVM. Specify it using the standard JUnit @{@link org.junit.runner.RunWith} mechanism.43 */44public class Remote extends Runner implements Filterable {45    /**46     * Specify the host where the test are going to be executed47     */48    @Target(ElementType.TYPE)49    @Retention(RetentionPolicy.RUNTIME)50    public static @interface Host {51        /**52         * Host name53         * @return54         */55        String name() default "localhost";56        /**57         * The port where the test runner service is listening58         * @return59         */60        int port() default RemoteTestServer.DEFAULT_PORT;61    }62    @Target(ElementType.TYPE)63    @Retention(RetentionPolicy.RUNTIME)64    public static @interface RunWith {65        /**66         * The runner class that is going to be used for running tests on the remote side.67         */68        Class<? extends Runner> value() default BlockJUnit4ClassRunner.class;69    }70    private static final Logger log = LoggerFactory.getLogger(com.datastax.junit.remote.Remote.class);71    private com.datastax.junit.remote.Runner delegate;72    protected String endpoint;73    protected Class<? extends Runner> remoteRunnerClass;74    protected Class<?> clazz;75    public Remote(Class<?> clazz) throws InitializationError {76        this.clazz = clazz;77    }78    /**79     * Override this if you need to do some setup, before trying to run the tests80     * (e.g. launching process where the tests should be executed81     */82    public void setup() {83    }84    /**85     * Override this if you need to do some teardown, after running the tests86     * (e.g. shutting down the process where the tests were executed87     */88    public void teardown() {89    }90    protected void init() {91        RunWith runWith = AnnotationUtils.getClassLevelAnnotation(RunWith.class, clazz);92        remoteRunnerClass = runWith != null ? runWith.value() : BlockJUnit4ClassRunner.class;93        Host host = AnnotationUtils.getClassLevelAnnotation(Host.class, clazz);94        endpoint = host != null ? String.format("//{}:{}/{})", host.name(), host.port(), RemoteTestServer.NAME) :95                "//localhost:"+ RemoteTestServer.DEFAULT_PORT+"/"+ RemoteTestServer.NAME;96        setup();97    }98    @Override99    public Description getDescription() {100        ensureDelegate();101        try102        {103            return delegate.getDescription();104        } catch (Exception e)105        {106            throw new RuntimeException(e);107        }108    }109    @Override110    public void run(RunNotifier notifier) {111        ensureDelegate();112        try113        {114            RemoteOutputStream out = new SimpleRemoteOutputStream(new UnclosableOutputStream(System.out));115            RemoteOutputStream err = new SimpleRemoteOutputStream(new UnclosableOutputStream(System.err));116            delegate.run(new RunNotifierFascade(notifier), out, err);117        } catch (Exception e)118        {119            throw new RuntimeException(e);120        } finally121        {122            teardown();123        }124    }125    @Override126    public void filter(Filter filter) throws NoTestsRemainException127    {128        ensureDelegate();129        try130        {131            delegate.filter(new RemoteFilter(filter));132        } catch (RemoteException e) {133            Throwable cause = e.getCause();134            if (cause != null && cause instanceof RemoteException && cause.getMessage().startsWith("notestsremain")) {135                throw (NoTestsRemainException) cause.getCause();136            } else {137                throw new RuntimeException(e);138            }139        }140    }141    private void ensureDelegate() {142        if (delegate == null) {143            init();144            try145            {146                RunnerFactory runnerFactory = (RunnerFactory) Naming.lookup(endpoint);147                delegate = runnerFactory.create(remoteRunnerClass.getName(), clazz.getName());148            } catch (Throwable t) {149                throw new RuntimeException(t);150            }151        }152    }153}...

Source:Suite.java

1package org.junit.runners;2import java.lang.annotation.ElementType;3import java.lang.annotation.Inherited;4import java.lang.annotation.Retention;5import java.lang.annotation.RetentionPolicy;6import java.lang.annotation.Target;7import java.util.List;8import org.junit.internal.builders.AllDefaultPossibilitiesBuilder;9import org.junit.runner.Description;10import org.junit.runner.Runner;11import org.junit.runner.notification.RunNotifier;12import org.junit.runners.model.InitializationError;13import org.junit.runners.model.RunnerBuilder;14/**15 * Using <code>Suite</code> as a runner allows you to manually16 * build a suite containing tests from many classes. It is the JUnit 4 equivalent of the JUnit 3.8.x17 * static {@link junit.framework.Test} <code>suite()</code> method. To use it, annotate a class18 * with <code>@RunWith(Suite.class)</code> and <code>@SuiteClasses({TestClass1.class, ...})</code>.19 * When you run this class, it will run all the tests in all the suite classes.20 *21 * @since 4.022 */23public class Suite extends ParentRunner<Runner> {24    /**25     * Returns an empty suite.26     */27    public static Runner emptySuite() {28        try {29            return new Suite((Class<?>) null, new Class<?>[0]);30        } catch (InitializationError e) {31            throw new RuntimeException("This shouldn't be possible");32        }33    }34    /**35     * The <code>SuiteClasses</code> annotation specifies the classes to be run when a class36     * annotated with <code>@RunWith(Suite.class)</code> is run.37     */38    @Retention(RetentionPolicy.RUNTIME)39    @Target(ElementType.TYPE)40    @Inherited41    public @interface SuiteClasses {42        /**43         * @return the classes to be run44         */45        public Class<?>[] value();46    }47    private static Class<?>[] getAnnotatedClasses(Class<?> klass) throws InitializationError {48        SuiteClasses annotation = klass.getAnnotation(SuiteClasses.class);49        if (annotation == null) {50            throw new InitializationError(String.format("class '%s' must have a SuiteClasses annotation", klass.getName()));51        }52        return annotation.value();53    }54    private final List<Runner> fRunners;55    /**56     * Called reflectively on classes annotated with <code>@RunWith(Suite.class)</code>57     *58     * @param klass the root class59     * @param builder builds runners for classes in the suite60     */61    public Suite(Class<?> klass, RunnerBuilder builder) throws InitializationError {62        this(builder, klass, getAnnotatedClasses(klass));63    }64    /**65     * Call this when there is no single root class (for example, multiple class names66     * passed on the command line to {@link org.junit.runner.JUnitCore}67     *68     * @param builder builds runners for classes in the suite69     * @param classes the classes in the suite70     */71    public Suite(RunnerBuilder builder, Class<?>[] classes) throws InitializationError {72        this(null, builder.runners(null, classes));73    }74    /**75     * Call this when the default builder is good enough. Left in for compatibility with JUnit 4.4.76     *77     * @param klass the root of the suite78     * @param suiteClasses the classes in the suite79     */80    protected Suite(Class<?> klass, Class<?>[] suiteClasses) throws InitializationError {81        this(new AllDefaultPossibilitiesBuilder(true), klass, suiteClasses);82    }83    /**84     * Called by this class and subclasses once the classes making up the suite have been determined85     *86     * @param builder builds runners for classes in the suite87     * @param klass the root of the suite88     * @param suiteClasses the classes in the suite89     */90    protected Suite(RunnerBuilder builder, Class<?> klass, Class<?>[] suiteClasses) throws InitializationError {91        this(klass, builder.runners(klass, suiteClasses));92    }93    /**94     * Called by this class and subclasses once the runners making up the suite have been determined95     *96     * @param klass root of the suite97     * @param runners for each class in the suite, a {@link Runner}98     */99    protected Suite(Class<?> klass, List<Runner> runners) throws InitializationError {100        super(klass);101        fRunners = runners;102    }103    @Override104    protected List<Runner> getChildren() {105        return fRunners;106    }107    @Override108    protected Description describeChild(Runner child) {109        return child.getDescription();110    }111    @Override112    protected void runChild(Runner runner, final RunNotifier notifier) {113        runner.run(notifier);114    }115}...

Source:WrapperOptions.java

1package uk.org.webcompere.testgadgets.runner;2import org.junit.runner.Runner;3import org.junit.runners.BlockJUnit4ClassRunner;4import java.lang.annotation.ElementType;5import java.lang.annotation.Retention;6import java.lang.annotation.RetentionPolicy;7import java.lang.annotation.Target;8/**9 * Options for the Test Wrapper10 */11@Retention(RetentionPolicy.RUNTIME)12@Target({ElementType.TYPE})13public @interface WrapperOptions {14    /**15     * The inner runner to use - the <em>real</em> test runner. Think of this as an inner16     * use of the {@link org.junit.runner.RunWith} annotation.17     */18    Class<? extends Runner> runWith() default BlockJUnit4ClassRunner.class;19}...

Annotation Type RunWith

Using AI Code Generation

1import org.junit.runner.RunWith;2import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;3import org.springframework.test.context.ContextConfiguration;4import org.springframework.test.context.web.WebAppConfiguration;5import org.springframework.beans.factory.annotation.Autowired;6import org.springframework.test.web.servlet.setup.MockMvcBuilders;7import org.mockito.Mock;8import org.mockito.InjectMocks;9import org.junit.Before;10import org.junit.Test;11import org.junit.Assert;12import org.springframework.test.web.servlet.MockMvc;13import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;14import org.springframework.test.web.servlet.result.MockMvcResultMatchers;15import org.springframework.test.web.servlet.result.MockMvcResultHandlers;16import org.springframework.web.context.WebApplicationContext;17import org.springframework.mock.web.MockHttpSession;18import org.springframework.mock.web.MockHttpServletRequest;19import org.springframework.mock.web.MockHttpServletResponse;20import org.springframework.mock.web.MockServletContext;21import

Annotation Type RunWith

Using AI Code Generation

1@RunWith(Suite.class)2@Suite.SuiteClasses({Test1.class, Test2.class})3public class TestSuite {4}5@RunWith(Suite.class)6@Suite.SuiteClasses({Test1.class, Test2.class})7public class TestSuite {8}9import static org.junit.Assert.assertEquals;10import org.junit.Test;11public class Test1 {12    public void test1() {13        assertEquals(5, 5);14    }15}16import static org.junit.Assert.assertEquals;17import org.junit.Test;18public class Test2 {19    public void test2() {20        assertEquals(5, 5);21    }22}23plugins {24}25repositories {26    jcenter()27}28dependencies {29}30while [ -h "$PRG" ] ; do31    link=`expr "$ls" : '.*-> \(.*\)$'`32    if expr "$link" : '/.*' > /dev/null; then

Annotation Type RunWith

Using AI Code Generation

1@RunWith(Suite.class)2@Suite.SuiteClasses({ 3})4public class TestSuite {5}6public void test() {7    Assert.assertEquals(1, 1);8}9public void test2() {10    Assert.assertEquals(1, 1);11}12public void test3() {13    Assert.assertEquals(1, 1);14}15public void test4() {16    Assert.assertEquals(1, 1);17}18public void test5() {19    Assert.assertEquals(1, 1);20}21public void test6() {22    Assert.assertEquals(1, 1);23}24public void test7() {25    Assert.assertEquals(1, 1);26}27public void test8() {28    Assert.assertEquals(1, 1);29}30public void test9() {31    Assert.assertEquals(1, 1);32}

Annotation Type RunWith

Using AI Code Generation

1@RunWith(SpringJUnit4ClassRunner.class)2@ContextConfiguration(locations = {"classpath:applicationContext.xml"})3public class SpringTest {4    private UserService userService;5    public void test() {6        userService.save();7    }8}9package com.itheima.service;10public interface UserService {11    public void save();12}13package com.itheima.service.impl;14import com.itheima.service.UserService;15public class UserServiceImpl implements UserService {16    public void save() {17        System.out.println("save running...");18    }19}

Source: How to get Spring to autowire integration test class using multiple contexts?

1/**2 * This class provides basic/common functionalities to be applied on Java Objects.3 */4public final class ObjectUtils {56    private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();78    private ObjectUtils() {9         throw new UnsupportedOperationException("Instantiation of this class is not permitted in case you are using reflection.");10    }1112    /**13     * This method is responsible for de-serializing the Java Object into Json String.14     *15     * @param object Object to be de-serialized.16     * @return String17     */18    public static String deserializeObjectToString(final Object object) {19        return GSON.toJson(object);20    }21}22

Source:How to get Spring to autowire integration test class using multiple contexts?

/**
 * This class provides basic/common functionalities to be applied on Java Objects.
 */
public final class ObjectUtils {

    private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();

    private ObjectUtils() {
         throw new UnsupportedOperationException("Instantiation of this class is not permitted in case you are using reflection.");
    }

    /**
     * This method is responsible for de-serializing the Java Object into Json String.
     *
     * @param object Object to be de-serialized.
     * @return String
     */
    public static String deserializeObjectToString(final Object object) {
        return GSON.toJson(object);
    }
}

Source: Disabling certain aspects during unit test runs

1public class test  {2int a;3char b;4String c;5Test2 test2;67@Override8public String toString() {9    return "test{" +10            "a=" + a +11            ", b=" + b +12            ", c='" + c + '\'' +13            ", test2=" + test2 +14            '}';15 }16}17

Source:Disabling certain aspects during unit test runs

public class test  {
int a;
char b;
String c;
Test2 test2;

@Override
public String toString() {
    return "test{" +
            "a=" + a +
            ", b=" + b +
            ", c='" + c + '\'' +
            ", test2=" + test2 +
            '}';
 }
}

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.