How to use classRules method of org.junit.runners.ParentRunner class

Best junit code snippet using org.junit.runners.ParentRunner.classRules

Source:ParentRunner.java

...119        }120        return new RunAfters(statement, afters, null);121    }122    private Statement withClassRules(Statement statement) {123        List<TestRule> classRules = classRules();124        if (classRules.isEmpty()) {125            return statement;126        }127        return new RunRules(statement, classRules, getDescription());128    }129    /* access modifiers changed from: protected */130    public List<TestRule> classRules() {131        List<TestRule> result = this.testClass.getAnnotatedMethodValues(null, ClassRule.class, TestRule.class);132        result.addAll(this.testClass.getAnnotatedFieldValues(null, ClassRule.class, TestRule.class));133        return result;134    }135    /* access modifiers changed from: protected */136    public Statement childrenInvoker(final RunNotifier notifier) {137        return new Statement() {138            /* class org.junit.runners.ParentRunner.AnonymousClass2 */139            @Override // org.junit.runners.model.Statement140            public void evaluate() {141                ParentRunner.this.runChildren(notifier);142            }143        };144    }...

Source:TestItemRunner.java

...104	 * @return a RunRules statement if any class-level {@link Rule}s are105	 *         found, or the base statement106	 */107	private Statement withClassRules(Statement statement) {108		List<TestRule> classRules = classRules();109		return classRules.isEmpty() ? statement :110			new RunRules(statement, classRules, getDescription());111	}112	@Override113	public void run(final RunNotifier notifier) {114		if(error != null) {115			notifier.fireTestFailure(new Failure(getDescription(), error));116		}117		super.run(notifier);118	}119}...

Source:ParentRunnerUtil.java

...63     *         64     * @see ParentRunner#withClassRules(Statement)65     */66    public static Statement withClassRules(Statement statement, TestClass testClass, Description description) {67        List<TestRule> classRules = getClassRules(testClass);68        return classRules.isEmpty() ? statement :69                new RunRules(statement, classRules, description);70    }71    /**72     * @param testClass 73     * @return the {@code ClassRule}s that can transform the block that runs74     *         each method in the tested class.75     *         76     * @see ParentRunner#classRules()77     */78    public static List<TestRule> getClassRules(TestClass testClass) {79        List<TestRule> result = testClass.getAnnotatedMethodValues(null, ClassRule.class, TestRule.class);80        result.addAll(testClass.getAnnotatedFieldValues(null, ClassRule.class, TestRule.class));81        return result;82    }83}...

Source:ClassRuleAspect.java

...29import org.aspectj.runtime.reflect.FieldSignatureImpl;30@Aspect("percflow(execution(void org.junit.runners.ParentRunner+.run(..)))")31public class ClassRuleAspect {32  private String testClass = "";33  private Set<String> classRules = new HashSet<>();34  @Pointcut("@annotation(org.junit.ClassRule)")35  void targetAnnotation() {36  }37  @Pointcut("target(org.junit.rules.ExternalResource+) && execution(void before())"38    + " && !cflow(execution(void org.junit.runners.ParentRunner+.runLeaf(..)))")39  void classRuleBefore() {40  }41  @Pointcut("target(org.junit.rules.ExternalResource+) && execution(void after())"42    + " && !cflow(execution(void org.junit.runners.ParentRunner+.runLeaf(..)))")43  void classRuleAfter() {44  }45  @Before("targetAnnotation()")46  public void targetAnnotationCall(JoinPoint jp) {47    testClass = jp.getStaticPart().getSourceLocation().getWithinType().getName();48    if (jp.getStaticPart().getSignature() instanceof FieldSignatureImpl) {49      FieldSignatureImpl fieldSignature = (FieldSignatureImpl) jp.getStaticPart().getSignature();50      classRules.add(fieldSignature.getFieldType().getName());51    }52  }53  @Around("classRuleBefore()")54  public Object classRuleBeforeCall(ProceedingJoinPoint jp) throws Throwable {55    return measure(jp, MeasureKind.CLASS_RULE_BEFORE);56  }57  @Around("classRuleAfter()")58  public Object classRuleAfterCall(ProceedingJoinPoint jp) throws Throwable {59    return measure(jp, MeasureKind.CLASS_RULE_AFTER);60  }61  private Object measure(ProceedingJoinPoint jp, MeasureKind measureKind) throws Throwable {62    String measureClass = jp.getTarget().getClass().getName();63    if (classRules.contains(measureClass)) {64      return AspectAssistant.measure(jp, measure -> measure65        .setTestClass(testClass)66        .setKind(measureKind));67    }68    return jp.proceed();69  }70}...

classRules

Using AI Code Generation

1public class ClassRulesRunner extends ParentRunner<FrameworkMethod> {2    public ClassRulesRunner(Class<?> klass) throws InitializationError {3        super(klass);4    }5    protected List<FrameworkMethod> getChildren() {6        return null;7    }8    protected Description describeChild(FrameworkMethod child) {9        return null;10    }11    protected void runChild(FrameworkMethod child, RunNotifier notifier) {12    }13    protected List<TestRule> classRules() {14        return Arrays.asList((TestRule) new TestName());15    }16}17public class WithRulesRunner extends ParentRunner<FrameworkMethod> {18    public WithRulesRunner(Class<?> klass) throws InitializationError {19        super(klass);20    }21    protected List<FrameworkMethod> getChildren() {22        return null;23    }24    protected Description describeChild(FrameworkMethod child) {25        return null;26    }27    protected void runChild(FrameworkMethod child, RunNotifier notifier) {28    }29    protected Statement withRules(FrameworkMethod method, Object target, Statement statement) {30        return super.withRules(method, target, statement);31    }32}33public class WithBeforesRunner extends ParentRunner<FrameworkMethod> {34    public WithBeforesRunner(Class<?> klass) throws InitializationError {35        super(klass);36    }37    protected List<FrameworkMethod> getChildren() {38        return null;39    }40    protected Description describeChild(FrameworkMethod child) {41        return null;42    }43    protected void runChild(FrameworkMethod child, RunNotifier notifier) {44    }45    protected Statement withBefores(FrameworkMethod method, Object target, Statement statement) {46        return super.withBefores(method, target, statement);47    }48}49public class WithAftersRunner extends ParentRunner<FrameworkMethod> {50    public WithAftersRunner(Class<?> klass) throws InitializationError {51        super(klass);52    }53    protected List<FrameworkMethod> getChildren() {54        return null;55    }

classRules

Using AI Code Generation

1@RunWith(Rules.class)2public class RulesTest {3    public static ExternalResource resource = new ExternalResource() {4        protected void before() throws Throwable {5            System.out.println("before");6        }7        protected void after() {8            System.out.println("after");9        }10    };11    public void test() {12        System.out.println("test");13    }14}15package com.journaldev.junit.rules;16import org.junit.ClassRule;17import org.junit.Rule;18import org.junit.Test;19import org.junit.rules.ExternalResource;20import org.junit.runner.RunWith;21import org.junit.runners.Parameterized;22import java.util.Arrays;23import java.util.Collection;24@RunWith(Parameterized.class)25public class RulesTest {26    public static ExternalResource resource = new ExternalResource() {27        protected void before() throws Throwable {28            System.out.println("before");29        }30        protected void after() {31            System.out.println("after");32        }33    };34    public ExternalResource resource2 = new ExternalResource() {35        protected void before() throws Throwable {36            System.out.println("before2");37        }38        protected void after() {39            System.out.println("after2");40        }41    };42    public int i;43    public static Collection<Object[]> data() {44        return Arrays.asList(new Object[][] { { 1 }, { 2 }, { 3 }, { 4 } });45    }46    public void test() {47        System.out.println("test");48    }49}50package com.journaldev.junit.rules;51import org.junit.ClassRule;52import org.junit.Rule;53import org.junit.Test;54import org.junit.rules.ExternalResource;55import org.junit.runner.RunWith;56import org.junit.runners.Parameterized;57import java.util.Arrays;58import java.util.Collection;59@RunWith(Parameterized

classRules

Using AI Code Generation

1import org.junit.rules.TestRule;2import org.junit.runners.model.FrameworkMethod;3import org.junit.runners.model.Statement;4import org.junit.runners.ParentRunner;5import java.lang.reflect.Field;6import java.util.ArrayList;7import java.util.List;8public class ClassRules implements TestRule {9    private final ParentRunner<?> runner;10    public ClassRules(ParentRunner<?> runner) {11        this.runner = runner;12    }13    public Statement apply(Statement base, FrameworkMethod method, Object target) {14        List<TestRule> rules = new ArrayList<TestRule>();15        try {16            Field field = runner.getClass().getDeclaredField("rules");17            field.setAccessible(true);18            rules = (List<TestRule>) field.get(runner);19        } catch (Exception e) {20            e.printStackTrace();21        }22        rules.add(this);23        return base;24    }25}26public class ClassRulesTest {27    public static ClassRules classRules = new ClassRules(new ParentRunner<Object>(Object.class) {28        protected List<FrameworkMethod> getChildren() {29            return null;30        }31        protected Description describeChild(FrameworkMethod child) {32            return null;33        }34        protected void runChild(FrameworkMethod method, RunNotifier notifier) {35        }36    });37    public TestRule testRule = new TestRule() {38        public Statement apply(Statement base, Description description) {39            System.out.println("testRule");40            return base;41        }42    };43    public void test() {44        System.out.println("test");45    }46}

classRules

Using AI Code Generation

1import org.junit.rules.MethodRule;2import org.junit.runners.model.FrameworkMethod;3import org.junit.runners.model.Statement;4public class RuleFactory implements MethodRule {5    private final Object[] params;6    public RuleFactory(Object... params) {7        this.params = params;8    }9    public Statement apply(final Statement base, final FrameworkMethod method, final Object target) {10        return new Statement() {11            public void evaluate() throws Throwable {12                base.evaluate();13            }14        };15    }16}17import static org.junit.Assert.assertEquals;18import static org.junit.Assert.fail;19import org.junit.Rule;20import org.junit.Test;21import org.junit.rules.TestRule;22public class RuleFactoryTest {23    public TestRule rule = new RuleFactory();24    public void testRule() {25        assertEquals(1, 1);26    }27}

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Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
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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.
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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.