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

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

Source:RulesTest.java

...13import org.junit.Rule;14import org.junit.Test;15import org.junit.rules.MethodRule;16import org.junit.rules.TestName;17import org.junit.rules.TestWatchman;18import org.junit.runner.JUnitCore;19import org.junit.runner.Result;20import org.junit.runners.model.FrameworkMethod;21import org.junit.runners.model.Statement;2223public class RulesTest {24	private static boolean wasRun;2526	public static class ExampleTest {27		@Rule28		public MethodRule example= new MethodRule() {29			public Statement apply(final Statement base,30					FrameworkMethod method, Object target) {31				return new Statement() {32					@Override33					public void evaluate() throws Throwable {34						wasRun= true;35						base.evaluate();36					};37				};38			}39		};4041		@Test42		public void nothing() {4344		}45	}4647	@Test48	public void ruleIsIntroducedAndEvaluated() {49		wasRun= false;50		JUnitCore.runClasses(ExampleTest.class);51		assertTrue(wasRun);52	}5354	private static int runCount;5556	public static class MultipleRuleTest {57		private static class Increment implements MethodRule {58			public Statement apply(final Statement base,59					FrameworkMethod method, Object target) {60				return new Statement() {61					@Override62					public void evaluate() throws Throwable {63						runCount++;64						base.evaluate();65					};66				};67			}68		}6970		@Rule71		public MethodRule incrementor1= new Increment();7273		@Rule74		public MethodRule incrementor2= new Increment();7576		@Test77		public void nothing() {7879		}80	}8182	@Test83	public void multipleRulesAreRun() {84		runCount= 0;85		JUnitCore.runClasses(MultipleRuleTest.class);86		assertEquals(2, runCount);87	}8889	public static class NoRulesTest {90		public int x;9192		@Test93		public void nothing() {9495		}96	}9798	@Test99	public void ignoreNonRules() {100		Result result= JUnitCore.runClasses(NoRulesTest.class);101		assertEquals(0, result.getFailureCount());102	}103104	private static String log;105106	public static class OnFailureTest {107		@Rule108		public MethodRule watchman= new TestWatchman() {109			@Override110			public void failed(Throwable e, FrameworkMethod method) {111				log+= method.getName() + " " + e.getClass().getSimpleName();112			}113		};114115		@Test116		public void nothing() {117			fail();118		}119	}120121	@Test122	public void onFailure() {123		log= "";124		Result result= JUnitCore.runClasses(OnFailureTest.class);125		assertEquals("nothing AssertionError", log);126		assertEquals(1, result.getFailureCount());127	}128129	public static class WatchmanTest {130		private static String watchedLog;131132		@Rule133		public MethodRule watchman= new TestWatchman() {134			@Override135			public void failed(Throwable e, FrameworkMethod method) {136				watchedLog+= method.getName() + " "137						+ e.getClass().getSimpleName() + "\n";138			}139140			@Override141			public void succeeded(FrameworkMethod method) {142				watchedLog+= method.getName() + " " + "success!\n";143			}144		};145146		@Test147		public void fails() {148			fail();149		}150151		@Test152		public void succeeds() {153		}154	}155156	@Test157	public void succeeded() {158		WatchmanTest.watchedLog= "";159		JUnitCore.runClasses(WatchmanTest.class);160		assertThat(WatchmanTest.watchedLog, containsString("fails AssertionError"));161		assertThat(WatchmanTest.watchedLog, containsString("succeeds success!"));162	}163164	public static class BeforesAndAfters {165		private static String watchedLog;166167		@Before public void before() {168			watchedLog+= "before ";169		}170		171		@Rule172		public MethodRule watchman= new TestWatchman() {173			@Override174			public void starting(FrameworkMethod method) {175				watchedLog+= "starting ";176			}177			178			@Override179			public void finished(FrameworkMethod method) {180				watchedLog+= "finished ";181			}182			183			@Override184			public void succeeded(FrameworkMethod method) {185				watchedLog+= "succeeded ";186			}
...

Source:TestWatchman$1.java

23import org.junit.runners.model.FrameworkMethod;4import org.junit.runners.model.Statement;56class TestWatchman$17  extends Statement8{9  TestWatchman$1(TestWatchman paramTestWatchman, FrameworkMethod paramFrameworkMethod, Statement paramStatement)10    throws Throwable11  {}12  13  /* Error */14  public void evaluate()15    throws Throwable16  {17    // Byte code:18    //   0: aload_019    //   1: getfield 16	org/junit/rules/TestWatchman$1:this$0	Lorg/junit/rules/TestWatchman;20    //   4: aload_021    //   5: getfield 18	org/junit/rules/TestWatchman$1:val$method	Lorg/junit/runners/model/FrameworkMethod;22    //   8: invokevirtual 34	org/junit/rules/TestWatchman:starting	(Lorg/junit/runners/model/FrameworkMethod;)V23    //   11: aload_024    //   12: getfield 20	org/junit/rules/TestWatchman$1:val$base	Lorg/junit/runners/model/Statement;25    //   15: invokevirtual 36	org/junit/runners/model/Statement:evaluate	()V26    //   18: aload_027    //   19: getfield 16	org/junit/rules/TestWatchman$1:this$0	Lorg/junit/rules/TestWatchman;28    //   22: aload_029    //   23: getfield 18	org/junit/rules/TestWatchman$1:val$method	Lorg/junit/runners/model/FrameworkMethod;30    //   26: invokevirtual 39	org/junit/rules/TestWatchman:succeeded	(Lorg/junit/runners/model/FrameworkMethod;)V31    //   29: aload_032    //   30: getfield 16	org/junit/rules/TestWatchman$1:this$0	Lorg/junit/rules/TestWatchman;33    //   33: aload_034    //   34: getfield 18	org/junit/rules/TestWatchman$1:val$method	Lorg/junit/runners/model/FrameworkMethod;35    //   37: invokevirtual 42	org/junit/rules/TestWatchman:finished	(Lorg/junit/runners/model/FrameworkMethod;)V36    //   40: return37    //   41: astore_138    //   42: aload_139    //   43: athrow40    //   44: astore_141    //   45: aload_042    //   46: getfield 16	org/junit/rules/TestWatchman$1:this$0	Lorg/junit/rules/TestWatchman;43    //   49: aload_044    //   50: getfield 18	org/junit/rules/TestWatchman$1:val$method	Lorg/junit/runners/model/FrameworkMethod;45    //   53: invokevirtual 42	org/junit/rules/TestWatchman:finished	(Lorg/junit/runners/model/FrameworkMethod;)V46    //   56: aload_147    //   57: athrow48    //   58: astore_149    //   59: aload_050    //   60: getfield 16	org/junit/rules/TestWatchman$1:this$0	Lorg/junit/rules/TestWatchman;51    //   63: aload_152    //   64: aload_053    //   65: getfield 18	org/junit/rules/TestWatchman$1:val$method	Lorg/junit/runners/model/FrameworkMethod;54    //   68: invokevirtual 46	org/junit/rules/TestWatchman:failed	(Ljava/lang/Throwable;Lorg/junit/runners/model/FrameworkMethod;)V55    //   71: aload_156    //   72: athrow57    // Local variable table:58    //   start	length	slot	name	signature59    //   0	73	0	this	160    //   41	2	1	localAssumptionViolatedException	org.junit.internal.AssumptionViolatedException61    //   44	13	1	localObject	java.lang.Object62    //   58	14	1	localThrowable	Throwable63    // Exception table:64    //   from	to	target	type65    //   11	29	41	org/junit/internal/AssumptionViolatedException66    //   11	29	44	finally67    //   42	44	44	finally68    //   59	73	44	finally69    //   11	29	58	java/lang/Throwable70  }71}7273
74/* Location:           L:\local\mybackup\temp\qq_apk\com.tencent.tim\classes14.jar
75 * Qualified Name:     org.junit.rules.TestWatchman.1
76 * JD-Core Version:    0.7.0.1

...

Source:ZKTestCase.java

...19import org.slf4j.Logger;20import org.slf4j.LoggerFactory;21import org.junit.Rule;22import org.junit.rules.MethodRule;23import org.junit.rules.TestWatchman;24import org.junit.runner.RunWith;25import org.junit.runners.model.FrameworkMethod;26/**27 * Base class for a non-parameterized ZK test.28 *29 * Basic utilities shared by all tests. Also logging of various events during30 * the test execution (start/stop/success/failure/etc...)31 */32@RunWith(JUnit4ZKTestRunner.class)33public class ZKTestCase {34    private static final Logger LOG = LoggerFactory.getLogger(ZKTestCase.class);35    private String testName;36    protected String getTestName() {37        return testName;38    }39    @Rule40    public MethodRule watchman = new TestWatchman() {41        @Override42        public void starting(FrameworkMethod method) {43            testName = method.getName();44            LOG.info("STARTING " + testName);45        }46        @Override47        public void finished(FrameworkMethod method) {48            LOG.info("FINISHED " + testName);49        }50        @Override51        public void succeeded(FrameworkMethod method) {52            LOG.info("SUCCEEDED " + testName);53        }54        @Override...

Source:TestWatchman.java

...40/*    */ 41/*    */ 42/*    */ 43/*    */ @Deprecated44/*    */ public class TestWatchman45/*    */   implements MethodRule46/*    */ {47/*    */   public Statement apply(final Statement base, final FrameworkMethod method, Object target) {48/* 48 */     return new Statement()49/*    */       {50/*    */         public void evaluate() throws Throwable {51/* 51 */           TestWatchman.this.starting(method);52/*    */           try {53/* 53 */             base.evaluate();54/* 54 */             TestWatchman.this.succeeded(method);55/* 55 */           } catch (AssumptionViolatedException e) {56/* 56 */             throw e;57/* 57 */           } catch (Throwable e) {58/* 58 */             TestWatchman.this.failed(e, method);59/* 59 */             throw e;60/*    */           } finally {61/* 61 */             TestWatchman.this.finished(method);62/*    */           } 63/*    */         }64/*    */       };65/*    */   }66/*    */   67/*    */   public void succeeded(FrameworkMethod method) {}68/*    */   69/*    */   public void failed(Throwable e, FrameworkMethod method) {}70/*    */   71/*    */   public void starting(FrameworkMethod method) {}72/*    */   73/*    */   public void finished(FrameworkMethod method) {}74/*    */ }75/* Location:              /home/arpit/Downloads/Picking-Tool-6.5.2.jar!/org/junit/rules/TestWatchman.class76 * Java compiler version: 5 (49.0)77 * JD-Core Version:       1.1.378 */...

Source:WatchmanTest.java

...6import org.junit.After;7import org.junit.Rule;8import org.junit.Test;9import org.junit.rules.MethodRule;10import org.junit.rules.TestWatchman;11import org.junit.runners.model.FrameworkMethod;1213/**14 * TestWatchman is a base class for Rules that take note of the testing action, 15 * without modifying it. For example, this class will keep a log of each passing 16 * and failing test.17 */18public class WatchmanTest {19    private final StringBuilder watchedLog = new StringBuilder();2021    @Rule22    public MethodRule watchman = new TestWatchman() {23        @Override24        public void failed(Throwable e, FrameworkMethod method) {25            watchedLog.append(method.getName()).append(" returned ")26            .append(e.getClass().getSimpleName()).append(": ")27            .append(e.getMessage());28        }2930        @Override31        public void succeeded(FrameworkMethod method) {32            watchedLog.append(method.getName());33        }34    };3536    @Test
...

Source:TestTestWatchman.java

...45import org.junit.Rule;6import org.junit.Test;7import org.junit.rules.MethodRule;8import org.junit.rules.TestWatchman;9import org.junit.runners.model.FrameworkMethod;1011public class TestTestWatchman {1213    @Rule14    public MethodRule watchman = new TestWatchman() {15        @Override16        public void failed( Throwable e, FrameworkMethod method ) {17            System.out.println( method.getName() + " " + e.getClass().getSimpleName() );18        }1920        @Override21        public void succeeded( FrameworkMethod method ) {22            System.out.println( method.getName() + " " + "success!" );23        }24    };2526    @Test27    public void failingMethod() {28        fail( "XFiles-like reason" );
...

Source:UnitTest.java

1import org.junit.Rule;2import org.junit.rules.MethodRule;3import org.junit.rules.TestWatchman;4import org.junit.runners.model.FrameworkMethod;5public class UnitTest {6    @Rule7    public MethodRule watchman = new TestWatchman() {8        public void starting(FrameworkMethod method) {9            System.out.println("\u001B[32m[ RUN     ] \u001B[0m" + method.getName() + "()");10        }11        public void succeeded(FrameworkMethod method) {12            System.out.println("\u001B[32m[      OK ] \u001B[0m");13        }14    };15    void log(String s) {16        System.out.println("-- " + s);17    }18    void error(String s) {19        System.out.println("-- \u001B[31mERROR:   " + s + "\u001B[0m");20    }21    void warning(String s) {...

TestWatchman

Using AI Code Generation

1import org.junit.rules.TestWatchman;2import org.junit.runners.model.FrameworkMethod;3public class TestWatchmanExample extends TestWatchman {4    public void starting(FrameworkMethod method) {5        System.out.println("Starting test: " + method.getName());6    }7}8import org.junit.rules.TestRule;9import org.junit.runner.Description;10import org.junit.runners.model.Statement;11public class TestRuleExample implements TestRule {12    public Statement apply(Statement base, Description description) {13        return statement(base, description);14    }15    private Statement statement(final Statement base, final Description description) {16        return new Statement() {17            public void evaluate() throws Throwable {18                System.out.println("Starting test: " + description.getMethodName());19                try {20                    base.evaluate();21                } finally {22                    System.out.println("Finished test: " + description.getMethodName());23                }24            }25        };26    }27}28import org.junit.rules.TestWatcher;29import org.junit.runner.Description;30public class TestWatcherExample extends TestWatcher {31    protected void starting(Description description) {32        System.out.println("Starting test: " + description.getMethodName());33    }34    protected void finished(Description description) {35        System.out.println("Finished test: " + description.getMethodName());36    }37}38import org.junit.runner.Description;39import org.junit.runner.notification.Failure;40import org.junit.runner.notification.RunListener;41public class TestListenerExample extends RunListener {42    public void testStarted(Description description) throws Exception {43        System.out.println("Starting test: " + description.getMethodName());44    }45    public void testFinished(Description description) throws Exception {46        System.out.println("Finished test: " + description.getMethodName());47    }48    public void testFailure(Failure failure) throws Exception {49        System.out.println("Failed test: " + failure.getDescription().getMethodName());50    }51    public void testIgnored(Description description) throws Exception {52        System.out.println("Ignored test: " + description.getMethodName());53    }54}55import org.junit.runner.Description;56import org.junit.runner.notification.Failure;57import org

TestWatchman

Using AI Code Generation

1import org.junit.rules.TestWatchman;2import org.junit.runners.model.FrameworkMethod;3import org.junit.runners.model.Statement;4public class TestWatchmanExample {5    public TestWatchman watchman = new TestWatchman() {6        public void starting(FrameworkMethod method) {7            System.out.println("Starting test: " + method.getName());8        }9        public void succeeded(FrameworkMethod method) {10            System.out.println("Succeeded: " + method.getName());11        }12        public void failed(Throwable e, FrameworkMethod method) {13            System.out.println("Failed: " + method.getName());14        }15    };16    public void test1() {17        System.out.println("Test1");18    }19    public void test2() {20        System.out.println("Test2");21    }22    public void test3() {23        System.out.println("Test3");24    }25}26import org.junit.rules.TemporaryFolder;27import org.junit.Rule;28import org.junit.Test;29import java.io.File;30import java.io.IOException;31public class TemporaryFolderExample {32    public TemporaryFolder folder = new TemporaryFolder();33    public void testUsingTempFolder() throws IOException {34        File createdFolder = folder.newFolder("newfolder");35        File createdFile = folder.newFile("myfilefile.txt");36        System.out.println(createdFolder);37        System.out.println(createdFile);38    }39}

TestWatchman

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TestWatchman;4import org.junit.runners.model.FrameworkMethod;5public class TestWatchmanTest {6    public TestWatchman watchman = new TestWatchman() {7        public void starting(FrameworkMethod method) {8            System.out.println("Starting test: " + method.getName());9        }10        public void succeeded(FrameworkMethod method) {11            System.out.println("Test succeeded: " + method.getName());12        }13        public void failed(Throwable e, FrameworkMethod method) {14            System.out.println("Test failed: " + method.getName());15        }16    };17    public void test1() {18        System.out.println("test1");19    }20    public void test2() {21        System.out.println("test2");22    }23    public void test3() {24        System.out.println("test3");25    }26    public void test4() {27        System.out.println("test4");28    }29    public void test5() {30        System.out.println("test5");31    }32    public void test6() {33        System.out.println("test6");34    }35}

TestWatchman

Using AI Code Generation

1import org.junit.Test;2import org.junit.rules.TestWatchman;3import org.junit.runners.model.FrameworkMethod;4public class TestWatchmanClass {5    public void testWatchman() {6        TestWatchman watchman = new TestWatchman() {7            public void starting(FrameworkMethod method) {8                System.out.println("Starting test: " + method.getName());9            }10        };11    }12}

TestWatchman

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TestWatcher;4import org.junit.runner.Description;5public class TestWatchmanTest {6    public TestWatcher watchman = new TestWatcher() {7        protected void starting(Description description) {8            System.out.println("About to start the test: " + description.getMethodName());9        }10        protected void succeeded(Description description) {11            System.out.println("Test succeeded: " + description.getMethodName());12        }13        protected void failed(Throwable e, Description description) {14            System.out.println("Test failed: " + description.getMethodName());15        }16        protected void finished(Description description) {17            System.out.println("Test finished: " + description.getMethodName());18        }19    };20    public void test1() {21        System.out.println("Running test1");22    }23    public void test2() {24        System.out.println("Running test2");25    }26    public void test3() {27        System.out.println("Running test3");28    }29}

Source: Get name of currently executing test in JUnit 4

1public boolean equals(Object anObject) {2    if (this == anObject) {3        return true;4    }5    if (anObject instanceof String) {6        String anotherString = (String)anObject;7        int n = value.length;8        // Quits here if Strings are different lengths.9        if (n == anotherString.value.length) {10            char v1[] = value;11            char v2[] = anotherString.value;12            int i = 0;13            // Quits here at first different character.14            while (n-- != 0) {15                if (v1[i] != v2[i])16                    return false;17                i++;18            }19            return true;20        }21    }22    return false;23}24

Source:Get name of currently executing test in JUnit 4

public boolean equals(Object anObject) {
    if (this == anObject) {
        return true;
    }
    if (anObject instanceof String) {
        String anotherString = (String)anObject;
        int n = value.length;
        // Quits here if Strings are different lengths.
        if (n == anotherString.value.length) {
            char v1[] = value;
            char v2[] = anotherString.value;
            int i = 0;
            // Quits here at first different character.
            while (n-- != 0) {
                if (v1[i] != v2[i])
                    return false;
                i++;
            }
            return true;
        }
    }
    return false;
}

JUnit Tutorial:

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JUnit Tutorial Chapters:

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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.