How to use Runner class of org.junit.runner package

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

Source:JUnit4ClassRunner.java Github

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...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}...

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Source:VerboseMockitoJUnitRunner.java Github

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...3 * This program is made available under the terms of the MIT License.4 */5package org.mockito.runners;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.Failure;12import org.junit.runner.notification.RunListener;13import org.junit.runner.notification.RunNotifier;14import org.mockito.internal.debugging.WarningsCollector;15import org.mockito.internal.runners.RunnerFactory;16import org.mockito.internal.runners.RunnerImpl;17import org.mockito.internal.util.junit.JUnitFailureHacker;18import java.lang.reflect.InvocationTargetException;19/**20 * Experimental implementation that suppose to improve tdd/testing experience. 21 * Don't hesitate to send feedback to mockito@googlegroups.com22 * <b>It is very likely it will change in the next version!</b>23 * <p>24 * This runner does exactly what {@link MockitoJUnitRunner} does but also 25 * adds extra Mocktio hints to the exception message. 26 * The point is that Mockito should help the tdd developer to quickly figure out if the test fails for the right reason and track the reason. 27 * <p>28 * The implementation is pretty hacky - it uses brute force of reflection to modify the exception message and add extra mockito hints.29 * You've been warned. 30 * <p>31 * Do you think it is useful or not? Drop us an email at mockito@googlegroups.com32 * <p>33 * Experimental implementation - will change in future!34 */35public class VerboseMockitoJUnitRunner extends Runner implements Filterable {36 private final RunnerImpl runner;37 public VerboseMockitoJUnitRunner(Class<?> klass) throws InvocationTargetException {38 this(new RunnerFactory().create(klass));39 }40 41 VerboseMockitoJUnitRunner(RunnerImpl runnerImpl) {42 this.runner = runnerImpl;43 }44 45 @Override46 public void run(RunNotifier notifier) { 47 //a listener that changes the failure's exception in a very hacky way...48 RunListener listener = new RunListener() {49 50 WarningsCollector warningsCollector;51 52 @Override53 public void testStarted(Description description) throws Exception {54 warningsCollector = new WarningsCollector();55 }...

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Source:JUnit4TestAdapter.java Github

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...3import org.junit.Ignore;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.NoTestsRemainException;11import org.junit.runner.manipulation.Sortable;12import org.junit.runner.manipulation.Sorter;13/**14 * The JUnit4TestAdapter enables running JUnit-4-style tests using a JUnit-3-style test runner.15 *16 * <p> To use it, add the following to a test class:17 * <pre>18 public static Test suite() {19 return new JUnit4TestAdapter(<em>YourJUnit4TestClass</em>.class);20 }21</pre>22 */23public class JUnit4TestAdapter implements Test, Filterable, Sortable, Describable {24 private final Class<?> fNewTestClass;25 private final Runner fRunner;26 private final JUnit4TestAdapterCache fCache;27 public JUnit4TestAdapter(Class<?> newTestClass) {28 this(newTestClass, JUnit4TestAdapterCache.getDefault());29 }30 public JUnit4TestAdapter(final Class<?> newTestClass, JUnit4TestAdapterCache cache) {31 fCache = cache;32 fNewTestClass = newTestClass;33 fRunner = Request.classWithoutSuiteMethod(newTestClass).getRunner();34 }35 public int countTestCases() {36 return fRunner.testCount();37 }38 public void run(TestResult result) {39 fRunner.run(fCache.getNotifier(result, this));40 }41 // reflective interface for Eclipse42 public List<Test> getTests() {43 return fCache.asTestList(getDescription());44 }45 // reflective interface for Eclipse46 public Class<?> getTestClass() {47 return fNewTestClass;48 }49 public Description getDescription() {50 Description description = fRunner.getDescription();51 return removeIgnored(description);52 }53 private Description removeIgnored(Description description) {54 if (isIgnored(description)) {55 return Description.EMPTY;56 }57 Description result = description.childlessCopy();58 for (Description each : description.getChildren()) {59 Description child = removeIgnored(each);60 if (!child.isEmpty()) {61 result.addChild(child);62 }63 }64 return result;65 }66 private boolean isIgnored(Description description) {67 return description.getAnnotation(Ignore.class) != null;68 }69 @Override70 public String toString() {71 return fNewTestClass.getName();72 }73 public void filter(Filter filter) throws NoTestsRemainException {74 filter.apply(fRunner);75 }76 public void sort(Sorter sorter) {77 sorter.apply(fRunner);78 }79}...

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Source:Filter.java Github

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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}...

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Source:GtestComputer.java Github

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...3// 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}...

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Source:Runner.java Github

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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 receiver...

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Source:NonExecutingRunner.java Github

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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 }...

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Source:AndroidJUnit4.java Github

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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}

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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}13import org.junit.runner.JUnitCore;14import org.junit.runner.Result;15import org.junit.runner.notification.Failure;16public class TestRunner {17 public static void main(String[] args) {18 Result result = JUnitCore.runClasses(TestJunit1.class, TestJunit2.class);19 for (Failure failure : result.getFailures()) {20 System.out.println(failure.toString());21 }22 System.out.println(result.wasSuccessful());23 }24}25import org.junit.runner.JUnitCore;26import org.junit.runner.Request;27import org.junit.runner.Result;28import org.junit.runner.notification.Failure;29public class TestRunner {30 public static void main(String[] args) {31 Result result = JUnitCore.runClasses(Request.method(TestJunit.class, "testAdd"));32 for (Failure failure : result.getFailures()) {33 System.out.println(failure.toString());34 }35 System.out.println(result.wasSuccessful());36 }37}38import org.junit.runner.JUnitCore;39import org.junit.runner.Result;40public class TestRunner {41 public static void main(String[] args) {42 Result result = JUnitCore.runClasses(TestJunit.class);43 System.out.println("Number of tests executed: " + result.getRunCount());44 }45}46import org.junit.runner.JUnitCore;47import org.junit.runner.Result;48import org.junit.runner.notification.Failure;49public class TestRunner {50 public static void main(String[] args) {51 Result result = JUnitCore.runClasses(TestJunit.class);52 for (Failure failure : result.getFailures()) {53 System.out.println(failure.toString());54 }55 System.out.println(result.wasSuccessful());56 }57}58import org.junit.runner.JUnitCore;59import org.junit.runner.Request;60import org.junit.runner.Result

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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}13 at org.junit.Assert.assertEquals(Assert.java:115)14 at org.junit.Assert.assertEquals(Assert.java:144)15 at TestJunit.testAdd(TestJunit.java:15)16 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)17 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)18 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)19 at java.lang.reflect.Method.invoke(Method.java:498)20 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)21 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)22 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)23 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)24 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)25 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)26 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)27 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)28 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)29 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)30 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)31 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)32 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)33 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)34 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)35 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)

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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}13at org.junit.Assert.assertEquals(Assert.java:115)14at org.junit.Assert.assertEquals(Assert.java:144)15at TestJunit.testAdd(TestJunit.java:15)16at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)17at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)18at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)19at java.lang.reflect.Method.invoke(Method.java:498)20at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)21at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)22at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)23at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)24at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)25at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)26at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)27at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)28at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)29at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)30at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)31at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)32at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)33at org.junit.runners.ParentRunner.run(ParentRunner.java:363)34at org.junit.runner.JUnitCore.run(JUnitCore.java:137)35at org.junit.runner.JUnitCore.run(JUnitCore.java:115)36at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:43)

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1import org.junit.runner.RunWith;2import org.junit.runners.Parameterized;3import org.junit.runners.Parameterized.Parameters;4@RunWith(Parameterized.class)5public class TestRunner {6 private int mInput;7 private int mExpected;8 public TestRunner(int input, int expected) {9 mInput = input;10 mExpected = expected;11 }12 public static Collection<Object[]> data() {13 return Arrays.asList(new Object[][]{14 {0, 1},15 {1, 1},16 {2, 2},17 {3, 6},18 {4, 24},19 {5, 120},20 {6, 720},21 {7, 5040},22 {8, 40320},23 {9, 362880},24 {10, 3628800}25 });26 }27 public void test() {28 assertEquals(mExpected, Factorial.compute(mInput));29 }30}31import org.junit.runner.RunWith;32import org.junit.runners.Suite;33@RunWith(Suite.class)34@Suite.SuiteClasses({TestA.class, TestB.class})35public class TestSuite {36}37import org.junit.runner.RunWith;38import org.junit.runners.Suite;39@RunWith(Suite.class)40@Suite.SuiteClasses({TestA.class, TestB.class})

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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}

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1import org.junit.runner.notification.RunNotifier;2import org.junit.runners.model.InitializationError;3import org.junit.runners.model.RunnerBuilder;4public class CustomRunner extends Runner {5}6package com.javacodegeeks.junit;7import org.junit.runner.notification.RunNotifier;8import org.junit.runners.model.InitializationError;9import org.junit.runners.model.RunnerBuilder;10public class CustomRunner extends Runner {11 public CustomRunner(Class<?> klass, RunnerBuilder builder) throws InitializationError {12 super(klass, builder);13 }14 public void run(RunNotifier notifier) {15 }16 public Description getDescription() {17 return null;18 }19}20package com.javacodegeeks.junit;21import org.junit.Test;22import org.junit.runner.RunWith;23@RunWith(CustomRunner.class)24public class CustomRunnerTest {25 public void test() {26 System.out.println("Test");27 }28}29package com.javacodegeeks.junit;30import org.junit.Test;31import org.junit.runner.RunWith;32@RunWith(CustomRunner.class)33public class CustomRunnerTest {34 public void test() {35 System.out.println("Test");36 }37}38package com.javacodegeeks.junit;39import org.junit.Test;40import org.junit.runner.RunWith;41@RunWith(CustomRunner.class)42public class CustomRunnerTest {43 public void test() {44 System.out.println("Test");45 }46}47package com.javacodegeeks.junit;48import org.junit.Test;49import org.junit.runner.RunWith;50@RunWith(CustomRunner.class)51public class CustomRunnerTest {52 public void test() {53 System.out.println("Test");54 }55}56package com.javacodegeeks.junit;57import org.junit.Test;58import org.junit.runner.RunWith;59@RunWith(CustomRunner.class)60public class CustomRunnerTest {61 public void test() {62 System.out.println("Test");63 }64}65package com.javacodegeeks.junit;66import org.junit.Test;67import org.junit.runner.RunWith;68@RunWith(CustomRunner.class)69public class CustomRunnerTest {70 public void test() {

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1public static Random RANDOM = new Random(System.nanoTime());23public static final float random(final float pMin, final float pMax) {4 return pMin + RANDOM.nextFloat() * (pMax - pMin);5}6
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1import java.util.Random;23/** Generate random integers in a certain range. */4public final class RandomRange {56 public static final void main(String... aArgs){7 log("Generating random integers in the range 1..10.");89 int START = 1;10 int END = 10;11 Random random = new Random();12 for (int idx = 1; idx <= 10; ++idx){13 showRandomInteger(START, END, random);14 }1516 log("Done.");17 }1819 private static void showRandomInteger(int aStart, int aEnd, Random aRandom){20 if ( aStart > aEnd ) {21 throw new IllegalArgumentException("Start cannot exceed End.");22 }23 //get the range, casting to long to avoid overflow problems24 long range = (long)aEnd - (long)aStart + 1;25 // compute a fraction of the range, 0 <= frac < range26 long fraction = (long)(range * aRandom.nextDouble());27 int randomNumber = (int)(fraction + aStart); 28 log("Generated : " + randomNumber);29 }3031 private static void log(String aMessage){32 System.out.println(aMessage);33 }34} 35
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1RandomUtils random = new RandomUtils();2random.nextInt(0, 0); // returns 03random.nextInt(10, 10); // returns 104random.nextInt(-10, 10); // returns numbers from -10 to 10 (-10, -9....9, 10)5random.nextInt(10, -10); // throws assert6
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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.

JUnit Certification:

You can also check out our JUnit certification if you wish to take your career in Selenium automation testing with JUnit to the next level.

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