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

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

Source:PDTTList.java

...97		protected List<Runner> getChildren() {98			return runners;99		}100		@Override101		protected Statement withBeforeClasses(Statement statement) {102			List<FrameworkMethod> annotatedMethods = getTestClass().getAnnotatedMethods(BeforeList.class);103			if (fFileList.length > 0 && !annotatedMethods.isEmpty()) {104				statement = new BeforeStatement(statement, annotatedMethods, createTestInstance());105			}106			return super.withBeforeClasses(statement);107		}108		@Override109		protected Statement withAfterClasses(Statement statement) {110			statement = super.withAfterClasses(statement);111			List<FrameworkMethod> annotatedMethods = getTestClass().getAnnotatedMethods(AfterList.class);112			if (fFileList.length > 0 && !annotatedMethods.isEmpty()) {113				statement = new AfterStatement(statement, annotatedMethods, createTestInstance());114			}115			return statement;116		}117	}118	/**119	 * Dir runner is used ony with recursives120	 */121	private class DirRunner extends ParentRunner {122		private final String fTestName;123		private final PHPVersion fPHPVersion;124		public DirRunner(Class<?> klass, PHPVersion phpVersion, String dir, String testName) throws Throwable {125			super(klass);126			fTestName = testName;127			fPHPVersion = phpVersion;128			fFileList = buildFileList(new String[] { dir });129			for (String fileName : fFileList) {130				runners.add(new FileTestClassRunner(this, fileName));131			}132			Enumeration<String> entryPaths = getBundle().getEntryPaths(dir);133			Bundle bundle = getBundle();134			if (entryPaths != null) {135				while (entryPaths.hasMoreElements()) {136					final String path = entryPaths.nextElement();137					if (!path.endsWith("/")) {138						continue;139					}140					final String namePath = path.substring(0, path.length() - 1);141					int pos = namePath.lastIndexOf('/');142					final String name = (pos >= 0 ? namePath.substring(pos + 1) : namePath);143					try {144						bundle.getEntry(path); // test Only145						runners.add(new DirRunner(klass, phpVersion, path, name));146					} catch (Exception e) {147						continue;148					}149				}150			}151		}152		@Override153		protected String getName() {154			return fTestName;155		}156		@Override157		protected Object[] getConstructorArgs() {158			return new Object[] { fPHPVersion, fFileList };159		}160	}161	/**162	 * PHPVersion group runner, it holds test instance for whole runner163	 */164	private class PHPVersionRunner extends ParentRunner {165		private final PHPVersion fPHPVersion;166		public PHPVersionRunner(Class<?> klass, PHPVersion phpVersion, String[] dirs) throws Throwable {167			super(klass);168			fPHPVersion = phpVersion;169			if (isRecursive) {170				for (String dirName : dirs) {171					runners.add(new DirRunner(klass, phpVersion, dirName, dirName));172				}173			} else {174				fFileList = buildFileList(dirs);175				for (String fileName : fFileList) {176					runners.add(new FileTestClassRunner(this, fileName));177				}178			}179		}180		@Override181		protected String getName() {182			return fPHPVersion.toString();183		}184		@Override185		protected Statement classBlock(RunNotifier notifier) {186			Statement statement = childrenInvoker(notifier);187			if (!isRecursive) {188				statement = withBeforeClasses(statement);189				statement = withAfterClasses(statement);190			}191			return statement;192		}193		@Override194		protected void collectInitializationErrors(java.util.List<Throwable> errors) {195			super.collectInitializationErrors(errors);196			validatePublicVoidWithNoArguments(BeforeList.class, errors);197			validatePublicVoidWithNoArguments(AfterList.class, errors);198		}199		protected void validatePublicVoidWithNoArguments(Class<? extends Annotation> clazz, List<Throwable> errors) {200			for (FrameworkMethod method : getTestClass().getAnnotatedMethods(clazz)) {201				if (!method.isPublic() || method.isStatic()) {202					errors.add(new Exception("Method have to be public not static"));203				}204				if (method.getMethod().getParameterTypes().length != 0) {205					errors.add(new Exception("Method must be without arguments"));206				}207			}208		}209		@Override210		protected Object[] getConstructorArgs() {211			return new Object[] { fPHPVersion, fFileList };212		}213	}214	public class BeforeStatement extends Statement {215		private final Statement fNext;216		private final List<FrameworkMethod> fBefores;217		private final Object fTest;218		public BeforeStatement(Statement next, List<FrameworkMethod> befores, Object test) {219			fNext = next;220			fBefores = befores;221			fTest = test;222		}223		@Override224		public void evaluate() throws Throwable {225			for (FrameworkMethod before : fBefores) {226				before.invokeExplosively(fTest);227			}228			fNext.evaluate();229		}230	}231	public class AfterStatement extends Statement {232		private final Statement fBefore;233		private final List<FrameworkMethod> fAfters;234		private final Object fTest;235		public AfterStatement(Statement before, List<FrameworkMethod> afters, Object test) {236			fBefore = before;237			fAfters = afters;238			fTest = test;239		}240		@Override241		public void evaluate() throws Throwable {242			List<Throwable> errors = new LinkedList<>();243			try {244				fBefore.evaluate();245			} catch (Throwable e) {246				errors.add(e);247			} finally {248				for (FrameworkMethod after : fAfters) {249					try {250						after.invokeExplosively(fTest);251					} catch (Throwable e) {252						errors.add(e);253					}254				}255			}256			MultipleFailureException.assertEmpty(errors);257		}258	}259	/**260	 * Runner for concrette PDTT file, it also holds TestInstance261	 */262	private class FileTestClassRunner extends BlockJUnit4ClassRunner {263		private final String fName;264		private final int fIndex;265		private final ParentRunner fParentRunner;266		public FileTestClassRunner(ParentRunner parentRunner, String name) throws InitializationError {267			super(parentRunner.getTestClass().getJavaClass());268			fName = name;269			// to avoid jUnit limitation270			fIndex = counter++;271			fParentRunner = parentRunner;272		}273		@Override274		protected String getName() {275			return fName;276		}277		@Override278		protected String testName(FrameworkMethod method) {279			return method.getName() + '[' + fIndex + ']';280		}281		@Override282		protected void validateConstructor(List<Throwable> errors) {283			Class<?> javaClass = getTestClass().getJavaClass();284			if (javaClass.getConstructors().length != 1) {285				errors.add(new Exception("Only one constructor is allowed!"));286				return;287			}288			Constructor<?> constructor = javaClass.getConstructors()[0];289			if (constructor.getParameterTypes().length != 2290					|| !constructor.getParameterTypes()[0].isAssignableFrom(PHPVersion.class)291					|| !constructor.getParameterTypes()[1].isAssignableFrom(String[].class)) {292				errors.add(new Exception("Public constructor with phpVersion and String[] argument is required"));293			}294		}295		@Override296		protected Object createTest() throws Exception {297			return fParentRunner.createTestInstance();298		}299		@Override300		protected Statement classBlock(RunNotifier notifier) {301			return childrenInvoker(notifier);302		}303		@Override304		protected Annotation[] getRunnerAnnotations() {305			return new Annotation[0];306		}307		@Override308		protected void validateTestMethods(List<Throwable> errors) {309			for (FrameworkMethod method : getTestClass().getAnnotatedMethods(Test.class)) {310				method.validatePublicVoid(false, errors);311				Class<?>[] types = method.getMethod().getParameterTypes();312				if (!(types.length == 0 || (types.length == 1 && types[0].isAssignableFrom(String.class)))) {313					errors.add(new Exception(method.toString() + ": Dirs list must by empty or one string"));314				}315			}316		}317		@Override318		protected Statement methodInvoker(final FrameworkMethod method, final Object test) {319			return new Statement() {320				@Override321				public void evaluate() throws Throwable {322					if (method.getMethod().getParameterTypes().length == 0) {323						method.invokeExplosively(test);324					} else {325						method.invokeExplosively(test, fName);326					}327				}328			};329		}330		@Override331		protected Description describeChild(FrameworkMethod method) {332			return Description.createTestDescription(getTestClass().getName(), method.getName() + '[' + fName + ']',333					getTestClass().getName() + '#' + fName + fIndex);334		}335	}336	private class SimpleFileRunner extends FileTestClassRunner {337		public SimpleFileRunner(ParentRunner parentRunner, String name) throws InitializationError {338			super(parentRunner, name);339		}340		@Override341		protected void validateConstructor(List<Throwable> errors) {342			Class<?> javaClass = getTestClass().getJavaClass();343			if (javaClass.getConstructors().length != 1) {344				errors.add(new Exception("Only one constructor is allowed!"));345				return;346			}347			Constructor<?> constructor = javaClass.getConstructors()[0];348			if (constructor.getParameterTypes().length != 1349					|| !constructor.getParameterTypes()[0].isAssignableFrom(String[].class)) {350				errors.add(new Exception("Public constructor with String[] argument is required"));351			}352		}353	}354	private Map<PHPVersion, String[]> parameters;355	private String[] dirs;356	private boolean isRecursive = false;357	private boolean isArray = false;358	private FakeFlatRunner flatRunner = null;359	public PDTTList(Class<?> klass) throws Throwable {360		super(klass);361		readParameters();362		if (isArray) {363			buildFlatRunners();364		} else {365			buildRunners();366		}367	}368	private class FakeFlatRunner extends ParentRunner {369		public FakeFlatRunner(Class<?> klass, String[] fileList) throws Exception {370			super(klass);371			fFileList = fileList;372		}373		@Override374		protected Object[] getConstructorArgs() {375			return new Object[] { fFileList };376		}377	}378	private void buildFlatRunners() throws Throwable {379		String[] fileList = buildFileList(dirs);380		flatRunner = new FakeFlatRunner(getTestClass().getJavaClass(), fileList);381		for (String fName : fileList) {382			runners.add(new SimpleFileRunner(flatRunner, fName));383		}384	}385	private void buildRunners() throws Throwable {386		for (Entry<PHPVersion, String[]> entry : parameters.entrySet()) {387			runners.add(new PHPVersionRunner(getTestClass().getJavaClass(), entry.getKey(), entry.getValue()));388		}389	}390	private void readParameters() throws Exception {391		for (FrameworkField field : getTestClass().getAnnotatedFields(Parameters.class)) {392			if (field.isPublic() && field.isPublic()) {393				if (field.getType().isAssignableFrom(Map.class)) {394					parameters = (Map<PHPVersion, String[]>) field.getField().get(null);395				} else if (field.getType().isAssignableFrom(String[].class)) {396					dirs = (String[]) field.getField().get(null);397					isArray = true;398				} else {399					continue;400				}401				for (Annotation ann : field.getAnnotations()) {402					if (ann instanceof Parameters) {403						isRecursive = ((Parameters) ann).recursive();404					}405				}406				return;407			}408		}409		throw new Exception(getTestClass().getName()410				+ ": Public static Map<PHPVersion, String[]>|String[] field with @Parameters is required");411	}412	@Override413	protected Statement withAfterClasses(Statement statement) {414		if (flatRunner != null) {415			return flatRunner.withAfterClasses(statement);416		}417		return super.withAfterClasses(statement);418	}419	@Override420	protected Statement withBeforeClasses(Statement statement) {421		if (flatRunner != null) {422			return flatRunner.withBeforeClasses(statement);423		}424		return super.withBeforeClasses(statement);425	}426}...

Source:ParentRunner.java

...90    /* access modifiers changed from: protected */91    public Statement classBlock(RunNotifier notifier) {92        Statement statement = childrenInvoker(notifier);93        if (!areAllChildrenIgnored()) {94            return withClassRules(withAfterClasses(withBeforeClasses(statement)));95        }96        return statement;97    }98    private boolean areAllChildrenIgnored() {99        for (T child : getFilteredChildren()) {100            if (!isIgnored(child)) {101                return false;102            }103        }104        return true;105    }106    /* access modifiers changed from: protected */107    public Statement withBeforeClasses(Statement statement) {108        List<FrameworkMethod> befores = this.testClass.getAnnotatedMethods(BeforeClass.class);109        if (befores.isEmpty()) {110            return statement;111        }112        return new RunBefores(statement, befores, null);113    }114    /* access modifiers changed from: protected */115    public Statement withAfterClasses(Statement statement) {116        List<FrameworkMethod> afters = this.testClass.getAnnotatedMethods(AfterClass.class);117        if (afters.isEmpty()) {118            return statement;119        }120        return new RunAfters(statement, afters, null);121    }...

Source:Karate.java

...82        }83    };84    private boolean beforeClassDone;85    @Override86    protected Statement withBeforeClasses(Statement statement) {87        if (!beforeClassDone) {88            return super.withBeforeClasses(statement);89        } else {90            return statement;91        }92    }93    @Override94    protected Description describeChild(Feature feature) {95        if (!beforeClassDone) {96            try {97                Statement statement = withBeforeClasses(NO_OP);98                statement.evaluate();99                beforeClassDone = true;100            } catch (Throwable e) {101                throw new RuntimeException(e);102            }103        }104        FeatureInfo info = new FeatureInfo(feature, tagSelector);105        featureMap.put(feature.getRelativePath(), info);106        return info.description;107    }108    @Override109    protected void runChild(Feature feature, RunNotifier notifier) {110        FeatureInfo info = featureMap.get(feature.getRelativePath());111        info.setNotifier(notifier);...

Source:ParameterizedRunner.java

...98	/*99	 * (non-Javadoc)100	 * 101	 * @see102	 * org.junit.runners.ParentRunner#withBeforeClasses(org.junit.runners.model.103	 * Statement)104	 */105	@Override106	protected Statement withBeforeClasses(Statement statement) {107		assertNotNull(firstChildRunner);108		return firstChildRunner.withBeforeClasses(statement);109	}110	/*111	 * (non-Javadoc)112	 * 113	 * @see114	 * org.junit.runners.ParentRunner#withAfterClasses(org.junit.runners.model.115	 * Statement)116	 */117	@Override118	protected Statement withAfterClasses(Statement statement) {119		assertNotNull(firstChildRunner);120		return firstChildRunner.withAfterClasses(statement);121	}122}...

Source:ParentRunnerUtil.java

...26     * Returns a {@link Statement}: run all non-overridden {@code @BeforeClass} methods on this class27     * and superclasses before executing {@code statement}; if any throws an28     * Exception, stop execution and pass the exception on.29     * 30     * @see ParentRunner#withBeforeClasses(Statement)31     */32    public static Statement withBeforeClasses(Statement statement, TestClass testClass) {33        List<FrameworkMethod> befores = testClass34                .getAnnotatedMethods(BeforeClass.class);35        return befores.isEmpty() ? statement :36                new RunBefores(statement, befores, null);37    }38    /**39     * Returns a {@link Statement}: run all non-overridden {@code @AfterClass} methods on this class40     * and superclasses after executing {@code statement}; all AfterClass methods are41     * always executed: exceptions thrown by previous steps are combined, if42     * necessary, with exceptions from AfterClass methods into a43     * {@link org.junit.runners.model.MultipleFailureException}.44     * 45     * @see ParentRunner#withAfterClasses(Statement)46     */...

withBeforeClasses

Using AI Code Generation

1public class BeforeClassExample {2    public static void beforeClass() {3        System.out.println("Before Class");4    }5    public void test1() {6        System.out.println("Test 1");7    }8    public void test2() {9        System.out.println("Test 2");10    }11}

withBeforeClasses

Using AI Code Generation

1public static void setUpClass() throws Exception {2}3public static void tearDownClass() throws Exception {4}5public void setUp() throws Exception {6}7public void tearDown() throws Exception {8}9public void test() {10}11public static TestRule classRule = new TestRule() {12    public Statement apply(Statement base, Description description) {13        return base;14    }15};16public TestRule methodRule = new TestRule() {17    public Statement apply(Statement base, Description description) {18        return base;19    }20};21public static TestRule classRule = new TestRule() {22    public Statement apply(Statement base, Description description) {23        return base;24    }25};26public TestRule methodRule = new TestRule() {27    public Statement apply(Statement base, Description description) {28        return base;29    }30};31public static TestRule classRule = new TestRule() {32    public Statement apply(Statement base, Description description) {33        return base;34    }35};

withBeforeClasses

Using AI Code Generation

1public class RunWithBeforeClasses {2    public void test1() {3        System.out.println("test1");4    }5    public void test2() {6        System.out.println("test2");7    }8    public void test3() {9        System.out.println("test3");10    }11    public TestRule beforeClassRule = new TestRule() {12        public Statement apply(Statement base, Description description) {13            return new Statement() {14                public void evaluate() throws Throwable {15                    System.out.println("Before class");16                    base.evaluate();17                }18            };19        }20    };21}22public class RunWithAfterClasses {23    public void test1() {24        System.out.println("test1");25    }26    public void test2() {27        System.out.println("test2");28    }29    public void test3() {30        System.out.println("test3");31    }32    public TestRule afterClassRule = new TestRule() {33        public Statement apply(Statement base, Description description) {34            return new Statement() {35                public void evaluate() throws Throwable {36                    base.evaluate();37                    System.out.println("After class");38                }39            };40        }41    };42}43public class RunWithBefores {

withBeforeClasses

Using AI Code Generation

1package org.example;2import org.junit.AfterClass;3import org.junit.BeforeClass;4import org.junit.runner.RunWith;5import org.junit.runners.Suite;6@RunWith(Suite.class)7@Suite.SuiteClasses({TestSuite1.class, TestSuite2.class})8public class TestSuite {9    public static void setUpClass() {10        System.out.println("Setting up the database");11    }12    public static void tearDownClass() {13        System.out.println("Closing the database");14    }15}16package org.example;17import org.junit.Test;18import static org.junit.Assert.*;19public class TestSuite1 {20    public void test1() {21        System.out.println("Test 1");22        assertTrue(true);23    }24    public void test2() {25        System.out.println("Test 2");26        assertTrue(true);27    }28}29package org.example;30import org.junit.Test;31import static org.junit.Assert.*;32public class TestSuite2 {33    public void test3() {34        System.out.println("Test 3");35        assertTrue(true);36    }37    public void test4() {38        System.out.println("Test 4");39        assertTrue(true);40    }41}

withBeforeClasses

Using AI Code Generation

1public static void setUpBeforeClass() throws Exception {2}3public static void tearDownAfterClass() throws Exception {4}5public void setUp() throws Exception {6}7public void tearDown() throws Exception {8}9public void setUp() throws Exception {10}11public void tearDown() throws Exception {12}13public void setUp() throws Exception {14}15public void tearDown() throws Exception {16}17public void setUp() throws Exception {18}19public void tearDown() throws Exception {20}

withBeforeClasses

Using AI Code Generation

1public class OrderTests {2    private static final Logger log = LoggerFactory.getLogger(OrderTests.class);3    public static void setUp() throws Exception {4        log.info("setUp");5    }6    public static void tearDown() throws Exception {7        log.info("tearDown");8    }9    public void before() throws Exception {10        log.info("before");11    }12    public void after() throws Exception {13        log.info("after");14    }15    public void test1() throws Exception {16        log.info("test1");17    }18    public void test2() throws Exception {19        log.info("test2");20    }21    public void test3() throws Exception {22        log.info("test3");23    }24    public void test4() throws Exception {25        log.info("test4");26    }27}28public class ReverseOrderTests {29    private static final Logger log = LoggerFactory.getLogger(ReverseOrderTests.class);30    public static void setUp() throws Exception {31        log.info("setUp");32    }33    public static void tearDown() throws Exception {34        log.info("tearDown");35    }36    public void before() throws Exception {37        log.info("before");38    }39    public void after() throws Exception {40        log.info("after");41    }42    public void test1() throws Exception {43        log.info("test1");44    }45    public void test2() throws Exception {46        log.info("test2");47    }48    public void test3() throws Exception {49        log.info("test3");50    }51    public void test4() throws Exception {52        log.info("test4");53    }54}

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.