How to use runnerForClass method of org.junit.runners.model.RunnerBuilder class

Best junit code snippet using org.junit.runners.model.RunnerBuilder.runnerForClass

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...22public final class ConcurrentSuite extends Suite {23 public ConcurrentSuite(final Class<?> klass) throws InitializationError {24 super(klass, new AllDefaultPossibilitiesBuilder(true) {25 @Override26 public Runner runnerForClass(Class<?> testClass) throws Throwable {27 List<RunnerBuilder> builders = Arrays.asList(28 new RunnerBuilder() {29 @Override30 public Runner runnerForClass(Class<?> testClass) throws Throwable {31 Concurrent annotation = testClass.getAnnotation(Concurrent.class);32 if (annotation != null)33 return new ConcurrentJunitRunner(testClass);34 return null;35 }36 },37 ignoredBuilder(),38 annotatedBuilder(),39 suiteMethodBuilder(),40 junit3Builder(),41 junit4Builder());42 for (RunnerBuilder each : builders) {43 Runner runner = each.safeRunnerForClass(testClass);44 if (runner != null)...

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...65 super(66 klass,67 new RunnerBuilder() {68 @Override69 public Runner runnerForClass(Class<?> testClass) throws Throwable {70 Boolean oldValue = IS_FAST_TEST_SUITE_ACTIVE.get();71 try {72 IS_FAST_TEST_SUITE_ACTIVE.set(true);73 Runner r = builder.runnerForClass(testClass);74 return r;75 } finally {76 IS_FAST_TEST_SUITE_ACTIVE.set(oldValue);77 }78 }79 });80 }81 }82}...

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...57 throws InitializationError {58 return super.getSuite(59 new RunnerBuilder() {60 @Override61 public Runner runnerForClass(Class<?> testClass) throws Throwable {62 return new GtestSuiteRunner(builder.runnerForClass(testClass));63 }64 }, classes);65 }66}...

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...44 Class<?>[] innerClasses = klass.getClasses();45 List<Runner> runners = new ArrayList<Runner>();46 for (Class<?> innerClass : innerClasses) {47 try {48 Runner runner = runnerBuilder.runnerForClass(innerClass);49 if (runner instanceof ErrorReportingRunner) {50 /​/​ runnerBuilder.runnerForClass(innerClass) failed,51 /​/​ inner class is not a test class and therefore ignored52 } else {53 runners.add(runner);54 }55 } catch (Throwable ignored) {56 /​/​ runnerBuilder.runnerForClass(innerClass) failed,57 /​/​ inner class is not a test class and therefore ignored58 }59 }60 return runners;61 }6263 public InnerTestClassesSuite(Class<?> klass, RunnerBuilder runnerBuilder) throws InitializationError {64 super(klass, getRunnersForInnerTestClasses(klass, runnerBuilder));65 }66} ...

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...28 29 public OnceOnlySuite(Class<?> testClass, final RunnerBuilder builder) throws InitializationError {30 super(testClass, new RunnerBuilder() {31 @Override32 public Runner runnerForClass(Class<?> testClass) throws Throwable {33 if (alreadySeen.contains(testClass)) {34 return new IgnoredClassRunner(testClass);35 }36 alreadySeen.add(testClass);37 return builder.runnerForClass(testClass);38 }39 });40 }41}...

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...21public class ContributableFeaturesRunner extends Suite {22 public ContributableFeaturesRunner(final Class<?> clazz, final RunnerBuilder builder) throws InitializationError {23 super(clazz, new RunnerBuilder() {24 @Override25 public Runner runnerForClass(Class<?> testClass) throws Throwable {26 Runner runner = builder.runnerForClass(testClass);27 if (runner instanceof FeaturesRunner) {28 ((FeaturesRunner) runner).loader.loadFeatures(clazz);29 }30 return runner;31 }32 });33 }34}...

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...26/​* */​ 27/​* */​ public Runner getSuite(final RunnerBuilder builder, Class<?>[] classes) throws InitializationError {28/​* 28 */​ return (Runner)new Suite(new RunnerBuilder()29/​* */​ {30/​* */​ public Runner runnerForClass(Class<?> testClass) throws Throwable {31/​* 31 */​ return Computer.this.getRunner(builder, testClass);32/​* */​ }33/​* */​ }classes);34/​* */​ }35/​* */​ 36/​* */​ 37/​* */​ 38/​* */​ 39/​* */​ protected Runner getRunner(RunnerBuilder builder, Class<?> testClass) throws Throwable {40/​* 40 */​ return builder.runnerForClass(testClass);41/​* */​ }42/​* */​ }43/​* Location: /​home/​arpit/​Downloads/​Picking-Tool-6.5.2.jar!/​org/​junit/​runner/​Computer.class44 * Java compiler version: 5 (49.0)45 * JD-Core Version: 1.1.346 */​...

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runnerForClass

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1import org.junit.runner.RunWith;2import org.junit.runners.Suite;3import org.junit.runners.model.RunnerBuilder;4@RunWith(Suite.class)5@Suite.SuiteClasses({Test1.class, Test2.class})6public class TestSuiteRunner {7 public static void main(String[] args) {8 RunnerBuilder runnerBuilder = new RunnerBuilder() {9 public Runner runnerForClass(Class<?> testClass) throws Throwable {10 return new TestSuiteRunner(testClass);11 }12 };13 }14}15import org.junit.runner.Runner;16import org.junit.runner.notification.RunNotifier;17import org.junit.runners.model.FrameworkMethod;18import org.junit.runners.model.InitializationError;19import org.junit.runners.model.RunnerBuilder;20import java.util.List;21public class RunnerBuilderExample {22 public static void main(String[] args) throws InitializationError {23 RunnerBuilder runnerBuilder = new RunnerBuilder() {24 public Runner runnerForClass(Class<?> testClass) throws Throwable {25 return new RunnerBuilderExampleRunner(testClass);26 }27 };28 }29}30class RunnerBuilderExampleRunner extends Runner {31 private Class<?> testClass;32 public RunnerBuilderExampleRunner(Class<?> testClass) {33 this.testClass = testClass;34 }35 public Description getDescription() {36 return Description.createSuiteDescription(testClass);37 }38 public void run(RunNotifier notifier) {39 }40}41import org.junit.runner.Runner;42import org.junit.runner.notification.RunNotifier;43import org.junit.runners.model.FrameworkMethod;44import org.junit.runners.model.InitializationError;45import org.junit.runners.model.RunnerBuilder;46import java.util.List;47public class RunnerBuilderExample {48 public static void main(String[] args) throws InitializationError {49 RunnerBuilder runnerBuilder = new RunnerBuilder() {50 public Runner runnerForClass(Class<?> testClass) throws Throwable {51 return new RunnerBuilderExampleRunner(testClass);52 }53 };54 }55}56class RunnerBuilderExampleRunner extends Runner {57 private Class<?> testClass;58 public RunnerBuilderExampleRunner(Class<?> testClass) {59 this.testClass = testClass;60 }

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runnerForClass

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1public static void main(String[] args) {2 JUnitCore core = new JUnitCore();3 core.addListener(new TextListener(System.out));4 core.run(runnerForClass(SampleTest.class));5}6public static void main(String[] args) {7 JUnitCore core = new JUnitCore();8 core.addListener(new TextListener(System.out));9 core.runClasses(SampleTest.class, SampleTest2.class);10}11public static void main(String[] args) {12 JUnitCore.runMain(new JUnitCore(), SampleTest.class.getName(), args);13}14public static void main(String[] args) {

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runnerForClass

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1@RunWith(Suite.class)2@Suite.SuiteClasses({3})4public class SuiteRunner {5}6@RunWith(Suite.class)7@Suite.SuiteClasses({8})9public class SuiteRunner {10}11@RunWith(Suite.class)12@Suite.SuiteClasses({13})14public class SuiteRunner {15}16@RunWith(Suite.class)17@Suite.SuiteClasses({18})19public class SuiteRunner {20}21@RunWith(Suite.class)22@Suite.SuiteClasses({23})24public class SuiteRunner {25}26@RunWith(Suite.class)27@Suite.SuiteClasses({28})29public class SuiteRunner {30}31@RunWith(Suite.class)32@Suite.SuiteClasses({33})34public class SuiteRunner {35}36@RunWith(Suite.class)37@Suite.SuiteClasses({38})39public class SuiteRunner {40}41@RunWith(Suite.class)42@Suite.SuiteClasses({43})44public class SuiteRunner {45}

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If you add in Hamcrest and JUnit4, you could do:

String x = "foo bar";
Assert.assertThat(x, CoreMatchers.containsString("foo"));

With some static imports, it looks a lot better:

assertThat(x, containsString("foo"));

The static imports needed would be:

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.CoreMatchers.containsString;
https://stackoverflow.com/questions/1092219/assertcontains-on-strings-in-junit

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This article is a part of our Content Hub. For more in-depth resources, check out our content hub on JUnit Tutorial.

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