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How to use Timeout class of org.junit.rules package

Best junit code snippet using org.junit.rules.Timeout

Source:TimeoutIntegrationTest.java

...37 * https://github.com/junit-team/junit/issues/686. This test verifies that Buck honors this behavior38 * of JUnit with its custom {@link BuckBlockJUnit4ClassRunner}.39 * <p>40 * That said, this behavior of JUnit interacts badly with a default test timeout in41 * {@code .buckconfig} because it requires adding {@link org.junit.rules.Timeout} to the handful of42 * tests that exploit this behavior.43 */44public class TimeoutIntegrationTest {45  private static final String PATH_TO_TIMEOUT_BEHAVIOR_TEST = "TimeoutChangesBehaviorTest.java";46  @Rule47  public DebuggableTemporaryFolder temporaryFolder = new DebuggableTemporaryFolder();48  @Test49  public void testThatTimeoutsInTestsWorkAsExpected() throws IOException {50    ProjectWorkspace workspace = TestDataHelper.createProjectWorkspaceForScenario(51        this, "timeouts", temporaryFolder);52    workspace.setUp();53    // ExceedsAnnotationTimeoutTest should fail.54    ProcessResult exceedsAnnotationTimeoutTestResult = workspace.runBuckCommand(55        "test", "//:ExceedsAnnotationTimeoutTest");56    exceedsAnnotationTimeoutTestResult.assertExitCode("Test should fail due to timeout", 1);57    assertThat(exceedsAnnotationTimeoutTestResult.getStderr(),58        containsString(59            "FAILURE testShouldFailDueToExpiredTimeout: test timed out after 1000 milliseconds"));60    // TimeoutChangesBehaviorTest should pass.61    ProcessResult timeoutTestWithoutTimeout = workspace.runBuckCommand(62        "test", "//:TimeoutChangesBehaviorTest");63    timeoutTestWithoutTimeout.assertExitCode(0);64    // TimeoutChangesBehaviorTest with @Test(timeout) specified should fail.65    // See https://github.com/junit-team/junit/issues/686 about why it fails.66    modifyTimeoutInTestAnnotation(PATH_TO_TIMEOUT_BEHAVIOR_TEST, /* addTimeout */ true);67    ProcessResult timeoutTestWithTimeoutOnAnnotation = workspace.runBuckCommand(68        "test", "//:TimeoutChangesBehaviorTest");69    timeoutTestWithTimeoutOnAnnotation.assertExitCode(1);70    assertThat(timeoutTestWithTimeoutOnAnnotation.getStderr(),71        containsString(72            "FAILURE testTimeoutDictatesTheSuccessOfThisTest: " +73            "Database should have an open transaction due to setUp()."));74    // TimeoutChangesBehaviorTest with @Rule(Timeout) should pass.75    modifyTimeoutInTestAnnotation(PATH_TO_TIMEOUT_BEHAVIOR_TEST, /* addTimeout */ false);76    insertTimeoutRule(PATH_TO_TIMEOUT_BEHAVIOR_TEST);77    ProcessResult timeoutTestWithTimeoutRule = workspace.runBuckCommand(78        "test", "//:TimeoutChangesBehaviorTest");79    timeoutTestWithTimeoutRule.assertExitCode(0);80    workspace.verify();81  }82  /**83   * Swaps all instances of {@code @Test} with {@code @Test(timeout = 10000)} in the specified Java84   * file, as determined by the value of {@code addTimeout}.85   */86  private void modifyTimeoutInTestAnnotation(String path, final boolean addTimeout)87      throws IOException {88    Function<String, String> transform = new Function<String, String>() {89      @Override public String apply(String line) {90        String original = addTimeout ? "@Test" : "@Test(timeout = 100000)";91        String replacement = addTimeout ? "@Test(timeout = 100000)" : "@Test";92        return line.replace(original, replacement) + '\n';93      }94    };95    rewriteFileWithTransform(path, transform);96  }97  /**98   * Inserts the following after the top-level class declaration:99   * <pre>100   *   @org.junit.Rule101   *   public org.junit.rules.Timeout timeoutForTests = new org.junit.rules.Timeout(10000);102   * </pre>103   */104  private void insertTimeoutRule(String path) throws IOException {105    Function<String, String> transform = new Function<String, String>() {106      @Override107      public String apply(String line) {108        if (line.startsWith("public class")) {109          return line + "\n\n" +110              "  @org.junit.Rule\n" +111              "  public org.junit.rules.Timeout timeoutForTests = " +112              "new org.junit.rules.Timeout(10000);\n";113        } else {114          return line + '\n';115        }116      }117    };118    rewriteFileWithTransform(path, transform);119  }120  /**121   * Finds the file at the specified path, transforms all of its lines using the specified122   * {@code transform} parameter, and writes the transformed lines back to the path.123   */124  private void rewriteFileWithTransform(String path, Function<String, String> transform)125      throws IOException {126    File javaFile = new File(temporaryFolder.getRoot(), path);...

Source:JunitRuleTest.java

...9import org.junit.rules.RuleChain;10import org.junit.rules.TemporaryFolder;11import org.junit.rules.TestName;12import org.junit.rules.TestRule;13import org.junit.rules.Timeout;14import org.junit.runner.Description;15import org.junit.runner.RunWith;16import org.junit.runners.model.FrameworkMethod;17import org.junit.runners.model.Statement;18import org.springframework.boot.test.context.SpringBootTest;19import org.springframework.test.context.junit4.SpringRunner;20import java.io.File;21import java.util.concurrent.TimeUnit;22/**23 * JunitRuleTest24 *25 * @author dongdaiming(è£ä»£æ)26 * @date 2019-07-2227 * @see <a href="https://blog.csdn.net/kingmax54212008/article/details/89003076">Junit Ruleçä½¿ç¨</a>28 */29@Slf4j30@RunWith(SpringRunner.class)31@SpringBootTest32public class JunitRuleTest {33    // TemporaryFolderå¯ç¨äºå¨æµè¯æ¶çææä»¶å¹¶å¨æµè¯å®åèªå¨å é¤34    @Rule35    public TemporaryFolder temporaryFolder = new TemporaryFolder(new File("/temp/junit"));36    // TestNameå¯ä»¥è·åå°å½åæµè¯æ¹æ³çåç§°37    @Rule38    public TestName testName = new TestName();39    // Timeoutå¯ä»¥è®¾ç½®å¨å±çè¶æ¶æ¶é´40    @Rule41    public Timeout timeout = Timeout.seconds(15);42    // èªå®ä¹æ¹æ³è§å-æå°æµè¯æ¹æ³åä¸èæ¶43    @Rule44    public MethodLoggingRule methodLogger = new MethodLoggingRule();45    // ExpectedExceptionå¯ä»¥å¹éå¼å¸¸ç±»ååå¼å¸¸message46    @Rule47    public ExpectedException expectedException = ExpectedException.none();48    @Rule49    public RuleChain ruleChain = RuleChain.outerRule(new LoggingRule(3)).around(new LoggingRule(2)).around(new LoggingRule(1));50    @Test51    public void testTemporaryFolder() throws Exception {52        File file = temporaryFolder.newFile();53        log.info("file: {}", file.getAbsolutePath());54        FileUtils.writeStringToFile(file, "abc", "utf-8", true);55        log.info("read data: {}", FileUtils.readFileToString(file, "utf-8"));56        TimeUnit.SECONDS.sleep(10);57    }58    @Test59    public void testTimeout() throws InterruptedException {60        TimeUnit.SECONDS.sleep(20);61    }62    @Test63    public void testNotTimeout() throws InterruptedException {64        TimeUnit.SECONDS.sleep(1);65    }66    @Test67    public void testMethodLogRule() throws InterruptedException {68        TimeUnit.MILLISECONDS.sleep(1234);69    }70    @Test71    public void testExpectException1() {72        expectedException.expect(NumberFormatException.class);73        expectedException.expectMessage("For input string: \"a\"");74        Integer.parseInt("a");75    }76    @Test(expected = ArithmeticException.class)77    public void testExpectException2() {...

Source:TestJUnitPredefinedRules.java

...11import org.junit.rules.ErrorCollector;12import org.junit.rules.ExpectedException;13import org.junit.rules.TemporaryFolder;14import org.junit.rules.TestName;15import org.junit.rules.Timeout;16import org.junit.rules.Verifier;17/**18 * @author vivek19 *20 */21public class TestJUnitPredefinedRules {22	/**23	 * This rule helps get the name of currently executing test case.24	 */25	@Rule26	public TestName testName = new TestName();27	/**28	 * This rule helps in creating temporary folders and files.29	 */30	@Rule31	public TemporaryFolder temporaryFolder = new TemporaryFolder();32	/**33	 * This rule helps verify that particular test case throws an expected exception34	 * or not.35	 */36	@Rule37	public ExpectedException expectedException = ExpectedException.none();38	/**39	 * The Timeout Rule applies the same timeout to all test methods in a class.40	 */41	@Rule42	public Timeout timeout = new Timeout(5, TimeUnit.SECONDS);43	/**44	 * The ErrorCollector rule allows execution of a test to continue after the45	 * first problem is found.46	 */47	@Rule48	public ErrorCollector errorCollector = new ErrorCollector();49	/**50	 * Verifier is a base class for Rules like ErrorCollector, which can51	 * turn otherwise passing test methods into failing tests if a verification check52	 * is failed.53	 */54	@Rule55	public Verifier verifier = new Verifier() {56		@Override57		protected void verify() throws Throwable {58			System.out.println("Verifier#Verify : " + testName.getMethodName());59		};60	};61	/**62	 * This is implementation of ExternalResource rule.63	 */64	@Rule65	public DatabaseResoureRule databaseResource = new DatabaseResoureRule();66	67	@Test68	public void testPrintHelloWorld_positiveTest() throws IOException, InterruptedException {69		// TestName Rule70		System.out.println("Executing : " + testName.getMethodName());71		// TemporaryFolder Rule72		System.out.println("Temp Folder Path : " + temporaryFolder.getRoot().getPath());73		// Creates a new temporary file.74		temporaryFolder.newFile();75		temporaryFolder.newFile("temp_file_1.txt");76		// Creates a new folder.77		temporaryFolder.newFolder();78		// Creates folder hierarchy79		temporaryFolder.newFolder("x", "xy", "xyz");80		// Sleep current thread81		// TimeUnit.SECONDS.sleep(40);82	}83	@Test84	public void testPrintHelloWorld_negativeTest() {85		// TestName rule86		System.out.println("Executing : " + testName.getMethodName());87		// ExpectedException - expected exception check88		expectedException.expect(IllegalArgumentException.class);89		expectedException.expectCause(isA(NullPointerException.class));90		expectedException.expectMessage("Invalid Argument");91		throw new IllegalArgumentException("Invalid Argument, cannot be empty or null.", new NullPointerException());92	}93	/**94	 * Timeout rule tester.95	 * 96	 * @throws InterruptedException97	 */98	@Test99	public void testTimeOutRule() throws InterruptedException {100		// Sleep will cause this method to take more than 10 seconds and therefore it101		// will terminated by Timeout rule.102		TimeUnit.SECONDS.sleep(10);103	}104	/**105	 * Test the functionality of ErrorCollector rule.106	 */107	@Test108	public void testErrorCollectorRule() {109		// First error occurred, instead of throwing it add in error collector.110		errorCollector.addError(new IllegalArgumentException("Invalid argument, cannot be nullor empty."));111		// Another exception identified.112		errorCollector.addError(new AssertionError("X must be identical to Y."));113		// Another check114		errorCollector.checkThat("Something went wrong, failure.", containsString("success"));115		// and so on till end of method....

Source:RulesUnitTest.java

...14import org.junit.rules.ErrorCollector;15import org.junit.rules.ExpectedException;16import org.junit.rules.TemporaryFolder;17import org.junit.rules.TestName;18import org.junit.rules.Timeout;19import org.slf4j.Logger;20import org.slf4j.LoggerFactory;21public class RulesUnitTest {22    private static final Logger LOG = LoggerFactory.getLogger(RulesUnitTest.class);23    @Rule24    public TemporaryFolder tmpFolder = new TemporaryFolder();25    @Rule26    public final ExpectedException thrown = ExpectedException.none();27    @Rule28    public TestName name = new TestName();29    @Rule30    public Timeout globalTimeout = Timeout.seconds(10);31    @Rule32    public final ErrorCollector errorCollector = new ErrorCollector();33    34    @Rule35    public DisableOnDebug disableTimeout = new DisableOnDebug(Timeout.seconds(30));36    37    @Rule38    public TestMethodNameLogger testLogger = new TestMethodNameLogger();39    @Test40    public void givenTempFolderRule_whenNewFile_thenFileIsCreated() throws IOException {41        File testFile = tmpFolder.newFile("test-file.txt");42        assertTrue("The file should have been created: ", testFile.isFile());43        assertEquals("Temp folder and test file should match: ", tmpFolder.getRoot(), testFile.getParentFile());44    }45    @Test46    public void givenIllegalArgument_whenExceptionThrown_thenMessageAndCauseMatches() {47        thrown.expect(IllegalArgumentException.class);48        thrown.expectCause(isA(NullPointerException.class));49        thrown.expectMessage("This is illegal");...

Source:RulesTest.java

...6import org.junit.rules.TemporaryFolder;7import org.junit.rules.TestName;8import org.junit.rules.TestRule;9import org.junit.rules.TestWatcher;10import org.junit.rules.Timeout;11import org.junit.runner.JUnitCore;12import org.junit.runner.Result;13import org.junit.runner.RunWith;14import static org.assertj.core.api.Assertions.*;15@RunWith(JUnitParamsRunner.class)16public class RulesTest {17    @Rule18    public TemporaryFolder folder = new TemporaryFolder();19    @Rule20    public ExpectedException exception = ExpectedException.none();21    @Rule22    public ErrorCollector errors = new ErrorCollector();23    @Rule24    public TestName testName = new TestName();25    @Rule26    public TestWatcher testWatcher = new TestWatcher() {27    };28    @Rule29    public Timeout timeout = new Timeout(0);30    @Test31    @Parameters("")32    public void shouldHandleRulesProperly(String n) {33        assertThat(testName.getMethodName()).isEqualTo("shouldHandleRulesProperly");34    }35    @Test36    public void shouldProvideHelpfulExceptionMessageWhenRuleIsUsedImproperly() {37        Result result = JUnitCore.runClasses(ProtectedRuleTest.class);38        assertThat(result.getFailureCount()).isEqualTo(1);39        assertThat(result.getFailures().get(0).getException())40                .hasMessage("The @Rule 'testRule' must be public.");41    }42    // TODO(JUnit4.10) - must be static in JUnit 4.1043    public static class ProtectedRuleTest {...

Source:Rules.java

...8import org.junit.rules.ExpectedException;9import org.junit.rules.TemporaryFolder;10import org.junit.rules.TestName;11import org.junit.rules.TestWatcher;12import org.junit.rules.Timeout;13import org.junit.runner.RunWith;14@RunWith(JUnitParamsRunner.class)15public class Rules {16    @Rule17    public TemporaryFolder folder = new TemporaryFolder();18    @Rule19    public ExpectedException exception = ExpectedException.none();20    @Rule21    public ErrorCollector errors = new ErrorCollector();22    @Rule23    public TestName testName = new TestName();24    @Rule25    public TestWatcher testWatcher = new TestWatcher() {};26    @Rule27    public Timeout timeout = new Timeout(28            0);29    @Test30    @Parameters("test")31    public void shouldHandleRulesWork(String n) {32        assertThat(testName.getMethodName()).isEqualTo("shouldHandleRulesWork");33    }34}

Timeout

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.Timeout;4public class TimeoutTest {5    public void testInfiniteLoop1() {6        while (true);7    }8    public void testInfiniteLoop2() {9        while (true);10    }11}12    at java.lang.Object.wait(Native Method)13    at java.lang.Object.wait(Object.java:503)14    at java.lang.Thread.join(Thread.java:1245)15    at java.lang.Thread.join(Thread.java:1319)16    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)17    at org.junit.runners.BlockJUnit4ClassRunner.run(BlockJUnit4ClassRunner.java:68)18    at org.junit.runners.Suite.runChild(Suite.java:128)19    at org.junit.runners.Suite.runChild(Suite.java:27)20    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)21    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)22    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)23    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)24    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)25    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)26    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)27    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)28    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)29    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)30    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)31import org.junit.Rule;32import org.junit.Test;33import org.junit.rules.Timeout;34public class TimeoutTest {35    public void testInfiniteLoop1() {

Timeout

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.Timeout;4public class TimeoutTest {5    public Timeout globalTimeout = Timeout.seconds(1);6    public void testInfiniteLoop1() {7        while (true) {8        }9    }10    public void testInfiniteLoop2() {11        while (true) {12        }13    }14}15    at java.lang.Object.wait(Native Method)16    at java.lang.Object.wait(Object.java:502)17    at java.lang.Thread.join(Thread.java:1252)18    at java.lang.Thread.join(Thread.java:1326)19    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)20    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)21    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)22    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)23    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)24    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)25    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)26    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)27    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)28    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)29    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)30    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)31    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)32[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.19.1:test (default-test

Timeout

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.Timeout;4import static org.junit.Assert.*;5public class TimeoutTest {6    public Timeout globalTimeout = Timeout.seconds(1);7    public void testInfiniteLoop1() {8        for (int i = 0; i < Integer.MAX_VALUE; i++) {9            System.out.println(i);10        }11    }12    public void testInfiniteLoop2() {13        for (int i = 0; i < Integer.MAX_VALUE; i++) {14            System.out.println(i);15        }16    }17}18    at java.lang.Object.wait(Native Method)19    at java.lang.Object.wait(Object.java:503)20    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)21    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)22    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)23    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:206)24    at java.lang.Object.wait(Native Method)25    at java.lang.Object.wait(Object.java:503)26    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)27    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)28    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)29    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:206)30    at java.lang.Object.wait(Native Method)31    at java.lang.Object.wait(Object.java:503)32    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)33    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)34    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)35    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:206)36    at java.lang.Object.wait(Native Method)37    at java.lang.Object.wait(Object.java:503)

Timeout

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3public class TimeoutTest {4    public Timeout globalTimeout = Timeout.seconds(2);5    public void testInfiniteLoop1() {6        while (true) {7        }8    }9    public void testInfiniteLoop2() {10        while (true) {11        }12    }13}14at org.junit.runners.model.TestTimedOutException.<init>(TestTimedOutException.java:19)15at org.junit.rules.Timeout$1.evaluate(Timeout.java:95)16at org.junit.rules.RunRules.evaluate(RunRules.java:20)17at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)18at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)19at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)20at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)21at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)22at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)23at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)24at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)25at org.junit.runners.ParentRunner.run(ParentRunner.java:363)26at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)27at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)28at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)29at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)30at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)31at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)32at org.junit.runners.model.TestTimedOutException.<init>(TestTimedOutException.java:19)33at org.junit.rules.Timeout$1.evaluate(Timeout.java:95)34at org.junit.rules.RunRules.evaluate(RunRules.java:20)

Timeout

Using AI Code Generation

1import org.junit.Test;2import org.junit.rules.Timeout;3import static org.junit.Assert.fail;4public class TestTimeout {5    public Timeout globalTimeout = Timeout.seconds(1);6    public void testInfiniteLoop1() {7        while (true);8    }9    public void testInfiniteLoop2() {10        fail("test should time out");11    }12}13testInfiniteLoop1(TestTimeout)  Time elapsed: 1.003 sec  <<< FAILURE!14testInfiniteLoop2(TestTimeout)  Time elapsed: 0.001 sec  <<< FAILURE!15    at java.lang.Object.wait(Native Method)16    at java.lang.Object.wait(Object.java:502)17    at TestTimeout.testInfiniteLoop1(TestTimeout.java:15)18    at TestTimeout.testInfiniteLoop2(TestTimeout.java:20)

Timeout

Using AI Code Generation

1import org.junit.Test;2import org.junit.rules.Timeout;3public class TimeoutTest {4    public Timeout globalTimeout = Timeout.seconds(10);5    public void testInfiniteLoop1() {6        while (true);7    }8    public void testInfiniteLoop2() {9        while (true);10    }11}12Testcase: testInfiniteLoop1(org.junit.rules.TimeoutTest):	Caused an ERROR13	at org.junit.rules.Timeout$1.evaluate(Timeout.java:119)14	at org.junit.rules.RunRules.evaluate(RunRules.java:20)15	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)16	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)17	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)18	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)19	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)20	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)21	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)22	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)23	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)24	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)25	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)26	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)27	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)28Testcase: testInfiniteLoop2(org.junit.rules.TimeoutTest):	Caused an ERROR29	at org.junit.rules.Timeout$1.evaluate(Timeout.java:119)

Source: How do servlets work? Instantiation, sessions, shared variables and multithreading

1                        A) if (data[c] >= 128)2                                /\3                               /  \4                              /    \5                        true /      \ false6                            /        \7                           /          \8                          /            \9                         /              \10              B) sum += data[c];          C) for loop or print().11

Source:How do servlets work? Instantiation, sessions, shared variables and multithreading

                        A) if (data[c] >= 128)
                                /\
                               /  \
                              /    \
                        true /      \ false
                            /        \
                           /          \
                          /            \
                         /              \
              B) sum += data[c];          C) for loop or print().

Source: How to set HttpResponse timeout for Android in Java

1data[c] = std::rand() % 256;2

Source: "implements Runnable" vs "extends Thread" in Java

1if (likely( everything_is_ok ))2{3 /* Do something */4}5

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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.
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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.