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How to use JUnit4 class of org.junit.runners package

Best junit code snippet using org.junit.runners.JUnit4

Source:JUnit4TestNotRunTest.java

...18import com.google.errorprone.BugCheckerRefactoringTestHelper.FixChoosers;19import com.google.errorprone.CompilationTestHelper;20import org.junit.Test;21import org.junit.runner.RunWith;22import org.junit.runners.JUnit4;23/** @author eaftan@google.com (Eddie Aftandilian) */24@RunWith(JUnit4.class)25public class JUnit4TestNotRunTest {26  private final CompilationTestHelper compilationHelper =27      CompilationTestHelper.newInstance(JUnit4TestNotRun.class, getClass());28  private final BugCheckerRefactoringTestHelper refactoringHelper =29      BugCheckerRefactoringTestHelper.newInstance(new JUnit4TestNotRun(), getClass());30  @Test31  public void testPositiveCase1() {32    compilationHelper.addSourceFile("JUnit4TestNotRunPositiveCase1.java").doTest();33  }34  @Test35  public void testPositiveCase2() {36    compilationHelper.addSourceFile("JUnit4TestNotRunPositiveCase2.java").doTest();37  }38  @Test39  public void containsVerifyAsIdentifier_shouldBeTest() {40    compilationHelper41        .addSourceLines(42            "Test.java",43            "import static org.mockito.Mockito.verify;",44            "import org.junit.runner.RunWith;",45            "import org.junit.runners.JUnit4;",46            "@RunWith(JUnit4.class)",47            "public class Test {",48            "  // BUG: Diagnostic contains: @Test",49            "  public void shouldDoSomething() {",50            "    verify(null);",51            "  }",52            "}")53        .doTest();54  }55  @Test56  public void containsQualifiedVerify_shouldBeTest() {57    compilationHelper58        .addSourceLines(59            "Test.java",60            "import org.junit.runner.RunWith;",61            "import org.junit.runners.JUnit4;",62            "import org.mockito.Mockito;",63            "@RunWith(JUnit4.class)",64            "public class Test {",65            "  // BUG: Diagnostic contains: @Test",66            "  public void shouldDoSomething() {",67            "    Mockito.verify(null);",68            "  }",69            "}")70        .doTest();71  }72  @Test73  public void containsAssertAsIdentifier_shouldBeTest() {74    compilationHelper75        .addSourceLines(76            "Test.java",77            "import org.junit.runner.RunWith;",78            "import org.junit.runners.JUnit4;",79            "import static com.google.common.truth.Truth.assertThat;",80            "import java.util.Collections;",81            "@RunWith(JUnit4.class)",82            "public class Test {",83            "  // BUG: Diagnostic contains: @Test",84            "  public void shouldDoSomething() {",85            "    assertThat(2).isEqualTo(2);",86            "  }",87            "  // BUG: Diagnostic contains: @Test",88            "  public void shouldDoTwoThings() {",89            "    Collections.sort(Collections.<Integer>emptyList());",90            "    assertThat(3).isEqualTo(3);",91            "  }",92            "}")93        .doTest();94  }95  @Test96  public void containsQualifiedAssert_shouldBeTest() {97    compilationHelper98        .addSourceLines(99            "Test.java",100            "import org.junit.runner.RunWith;",101            "import org.junit.runners.JUnit4;",102            "import com.google.common.truth.Truth;",103            "@RunWith(JUnit4.class)",104            "public class Test {",105            "  // BUG: Diagnostic contains: @Test",106            "  public void shouldDoSomething() {",107            "    Truth.assertThat(1).isEqualTo(1);",108            "  }",109            "}")110        .doTest();111  }112  @Test113  public void containsCheckAsIdentifier_shouldBeTest() {114    compilationHelper115        .addSourceLines(116            "Test.java",117            "import static com.google.common.base.Preconditions.checkState;",118            "import org.junit.runner.RunWith;",119            "import org.junit.runners.JUnit4;",120            "@RunWith(JUnit4.class)",121            "public class Test {",122            "  // BUG: Diagnostic contains: @Test",123            "  public void shouldDoSomething() {",124            "    checkState(false);",125            "  }",126            "}")127        .doTest();128  }129  @Test130  public void containsQualifiedCheck_shouldBeTest() {131    compilationHelper132        .addSourceLines(133            "Test.java",134            "import com.google.common.base.Preconditions;",135            "import org.junit.runner.RunWith;",136            "import org.junit.runners.JUnit4;",137            "@RunWith(JUnit4.class)",138            "public class Test {",139            "  // BUG: Diagnostic contains: @Test",140            "  public void shouldDoSomething() {",141            "    Preconditions.checkState(false);",142            "  }",143            "}")144        .doTest();145  }146  @Test147  public void containsFailAsIdentifier_shouldBeTest() {148    compilationHelper149        .addSourceLines(150            "Test.java",151            "import static org.junit.Assert.fail;",152            "import org.junit.runner.RunWith;",153            "import org.junit.runners.JUnit4;",154            "@RunWith(JUnit4.class)",155            "public class Test {",156            "  // BUG: Diagnostic contains: @Test",157            "  public void shouldDoSomething() {",158            "    fail();",159            "  }",160            "}")161        .doTest();162  }163  @Test164  public void containsQualifiedFail_shouldBeTest() {165    compilationHelper166        .addSourceLines(167            "Test.java",168            "import org.junit.Assert;",169            "import org.junit.runner.RunWith;",170            "import org.junit.runners.JUnit4;",171            "@RunWith(JUnit4.class)",172            "public class Test {",173            "  // BUG: Diagnostic contains: @Test",174            "  public void shouldDoSomething() {",175            "    Assert.fail();",176            "  }",177            "}")178        .doTest();179  }180  @Test181  public void containsExpectAsIdentifier_shouldBeTest() {182    compilationHelper183        .addSourceLines(184            "Test.java",185            "import static org.junit.Assert.assertThrows;",186            "import org.junit.runner.RunWith;",187            "import org.junit.runners.JUnit4;",188            "@RunWith(JUnit4.class)",189            "public class Test {",190            "  // BUG: Diagnostic contains: @Test",191            "  public void shouldDoSomething() {",192            "    assertThrows(null, null);",193            "  }",194            "}")195        .doTest();196  }197  @Test198  public void containsQualifiedExpect_shouldBeTest() {199    compilationHelper200        .addSourceLines(201            "Test.java",202            "import org.junit.Assert;",203            "import org.junit.runner.RunWith;",204            "import org.junit.runners.JUnit4;",205            "@RunWith(JUnit4.class)",206            "public class Test {",207            "  // BUG: Diagnostic contains: @Test",208            "  public void shouldDoSomething() {",209            "    Assert.assertThrows(null, null);",210            "  }",211            "}")212        .doTest();213  }214  @Test215  public void noTestKeyword_notATest() {216    compilationHelper217        .addSourceLines(218            "Test.java",219            "import org.junit.runner.RunWith;",220            "import org.junit.runners.JUnit4;",221            "import java.util.Collections;",222            "@RunWith(JUnit4.class)",223            "public class Test {",224            "  public void shouldDoSomething() {",225            "    Collections.sort(Collections.<Integer>emptyList());",226            "  }",227            "}")228        .doTest();229  }230  @Test231  public void staticMethodWithTestKeyword_notATest() {232    compilationHelper233        .addSourceLines(234            "Test.java",235            "import org.junit.runner.RunWith;",236            "import org.junit.runners.JUnit4;",237            "import java.util.Collections;",238            "@RunWith(JUnit4.class)",239            "public class Test {",240            "  private static void assertDoesSomething() {}",241            "  public static void shouldDoSomething() {",242            "    assertDoesSomething();",243            "  }",244            "}")245        .doTest();246  }247  @Test248  public void hasOtherAnnotation_notATest() {249    compilationHelper250        .addSourceLines(251            "Test.java",252            "import org.junit.runner.RunWith;",253            "import org.junit.runners.JUnit4;",254            "@RunWith(JUnit4.class)",255            "public class Test {",256            "  @Deprecated",257            "  public void shouldDoSomething() {",258            "    verify();",259            "  }",260            "  private void verify() {}",261            "}")262        .doTest();263  }264  @Test265  public void hasOtherAnnotationAndNamedTest_shouldBeTest() {266    compilationHelper267        .addSourceLines(268            "Test.java",269            "import org.junit.runner.RunWith;",270            "import org.junit.runners.JUnit4;",271            "import java.util.Collections;",272            "@RunWith(JUnit4.class)",273            "public class Test {",274            "  @Deprecated",275            "  // BUG: Diagnostic contains: @Test",276            "  public void testShouldDoSomething() {",277            "    Collections.sort(Collections.<Integer>emptyList());",278            "  }",279            "  private void verify() {}",280            "}")281        .doTest();282  }283  @Test284  public void shouldNotDetectMethodsOnAbstractClass() {285    compilationHelper286        .addSourceLines(287            "Test.java",288            "import org.junit.runner.RunWith;",289            "import org.junit.runners.JUnit4;",290            "@RunWith(JUnit4.class)",291            "public abstract class Test {",292            "  public void testDoSomething() {}",293            "}")294        .doTest();295  }296  @Test297  public void testFix() {298    refactoringHelper299        .addInputLines(300            "in/TestStuff.java",301            "import org.junit.runner.RunWith;",302            "import org.junit.runners.JUnit4;",303            "@RunWith(JUnit4.class)",304            "public class TestStuff {",305            "  public void testDoSomething() {}",306            "}")307        .addOutputLines(308            "out/TestStuff.java",309            "import org.junit.Test;",310            "import org.junit.runner.RunWith;",311            "import org.junit.runners.JUnit4;",312            "@RunWith(JUnit4.class)",313            "public class TestStuff {",314            "  @Test",315            "  public void testDoSomething() {}",316            "}")317        .setFixChooser(FixChoosers.FIRST)318        .doTest();319  }320  @Test321  public void ignoreFix() {322    refactoringHelper323        .addInputLines(324            "in/TestStuff.java",325            "import org.junit.runner.RunWith;",326            "import org.junit.runners.JUnit4;",327            "@RunWith(JUnit4.class)",328            "public class TestStuff {",329            "  public void testDoSomething() {}",330            "}")331        .addOutputLines(332            "out/TestStuff.java",333            "import org.junit.Ignore;",334            "import org.junit.Test;",335            "import org.junit.runner.RunWith;",336            "import org.junit.runners.JUnit4;",337            "@RunWith(JUnit4.class)",338            "public class TestStuff {",339            "  @Test @Ignore public void testDoSomething() {}",340            "}")341        .setFixChooser(FixChoosers.SECOND)342        .doTest();343  }344  @Test345  public void makePrivateFix() {346    refactoringHelper347        .addInputLines(348            "in/TestStuff.java",349            "import org.junit.runner.RunWith;",350            "import org.junit.runners.JUnit4;",351            "@RunWith(JUnit4.class)",352            "public class TestStuff {",353            "  public void testDoSomething() {}",354            "}")355        .addOutputLines(356            "out/TestStuff.java",357            "import org.junit.runner.RunWith;",358            "import org.junit.runners.JUnit4;",359            "@RunWith(JUnit4.class)",360            "public class TestStuff {",361            "  private void testDoSomething() {}",362            "}")363        .setFixChooser(FixChoosers.THIRD)364        .doTest();365  }366  @Test367  public void ignoreFixComesFirstWhenTestNamedDisabled() {368    refactoringHelper369        .addInputLines(370            "in/TestStuff.java",371            "import org.junit.runner.RunWith;",372            "import org.junit.runners.JUnit4;",373            "@RunWith(JUnit4.class)",374            "public class TestStuff {",375            "  public void disabledTestDoSomething() {",376            "    verify();",377            "  }",378            "  void verify() {}",379            "}")380        .addOutputLines(381            "out/TestStuff.java",382            "import org.junit.Ignore;",383            "import org.junit.Test;",384            "import org.junit.runner.RunWith;",385            "import org.junit.runners.JUnit4;",386            "@RunWith(JUnit4.class)",387            "public class TestStuff {",388            "  @Test @Ignore public void disabledTestDoSomething() {",389            "    verify();",390            "  }",391            "  void verify() {}",392            "}")393        .setFixChooser(FixChoosers.FIRST)394        .doTest();395  }396  @Test397  public void helperMethodCalledElsewhere() {398    compilationHelper399        .addSourceLines(400            "TestStuff.java",401            "import org.junit.runner.RunWith;",402            "import org.junit.runners.JUnit4;",403            "import org.junit.Test;",404            "@RunWith(JUnit4.class)",405            "public class TestStuff {",406            "  public void shouldDoSomething() {",407            "    verify();",408            "  }",409            "  @Test",410            "  public void testDoesSomething() {",411            "    shouldDoSomething();",412            "  }",413            "  void verify() {}",414            "}")415        .doTest();416  }417  @Test418  public void helperMethodCallFoundInNestedInvocation() {419    compilationHelper420        .addSourceLines(421            "TestStuff.java",422            "import org.junit.runner.RunWith;",423            "import org.junit.runners.JUnit4;",424            "import org.junit.Test;",425            "import java.util.function.Consumer;",426            "@RunWith(JUnit4.class)",427            "public class TestStuff {",428            "  public void shouldDoSomething() {",429            "    verify();",430            "  }",431            "  @Test",432            "  public void testDoesSomething() {",433            "    doSomething(u -> shouldDoSomething());",434            "  }",435            "  void doSomething(Consumer f) {}",436            "  void verify() {}",437            "}")438        .doTest();439  }440  @Test441  public void runWithNotRequired() {442    compilationHelper443        .addSourceLines(444            "TestStuff.java",445            "import org.junit.Test;",446            "public class TestStuff {",447            "  // BUG: Diagnostic contains: @Test",448            "  public void testDoesSomething() {}",449            "  @Test",450            "  public void foo() {}",451            "}")452        .doTest();453  }454  @Test455  public void testNegativeCase1() {456    compilationHelper.addSourceFile("JUnit4TestNotRunNegativeCase1.java").doTest();457  }458  @Test459  public void testNegativeCase2() {460    compilationHelper.addSourceFile("JUnit4TestNotRunNegativeCase2.java").doTest();461  }462  @Test463  public void testNegativeCase3() {464    compilationHelper.addSourceFile("JUnit4TestNotRunNegativeCase3.java").doTest();465  }466  @Test467  public void testNegativeCase4() {468    compilationHelper.addSourceFile("JUnit4TestNotRunNegativeCase4.java").doTest();469  }470  @Test471  public void testNegativeCase5() {472    compilationHelper473        .addSourceFile("JUnit4TestNotRunBaseClass.java")474        .addSourceFile("JUnit4TestNotRunNegativeCase5.java")475        .doTest();476  }477  @Test478  public void junit3TestWithIgnore() {479    compilationHelper480        .addSourceLines(481            "TestStuff.java",482            "import org.junit.Ignore;",483            "import org.junit.runner.RunWith;",484            "import org.junit.runners.JUnit4;",485            "@RunWith(JUnit4.class)",486            "public class TestStuff {",487            "  @Ignore",488            "  public void testMethod() {}",489            "}")490        .doTest();491  }492  @Test493  public void junit4Theory_isTestAnnotation() {494    compilationHelper495        .addSourceLines(496            "TestTheories.java",497            "import org.junit.runner.RunWith;",498            "import org.junit.experimental.theories.Theories;",499            "import org.junit.experimental.theories.Theory;",500            "@RunWith(Theories.class)",501            "public class TestTheories {",502            "  @Theory public void testMyTheory() {}",503            "}")504        .doTest();505  }506  @Test507  public void annotationOnSuperMethod() {508    compilationHelper509        .addSourceLines(510            "TestSuper.java",511            "import org.junit.Test;",512            "public class TestSuper {",513            "  @Test public void testToOverride() {}",514            "}")515        .addSourceLines(516            "TestSub.java",517            "import org.junit.runner.RunWith;",518            "import org.junit.runners.JUnit4;",519            "@RunWith(JUnit4.class)",520            "public class TestSub extends TestSuper {",521            "  @Override public void testToOverride() {}",522            "}")523        .doTest();524  }525}...

Source:StackTraceMonitorMojoTest.java

...6public class StackTraceMonitorMojoTest {7    @Test8    public void testTracesForMethods() throws Exception {9        String[] traces = {10                "[[D][1:<BookBean.java:com.hascode.tutorial.service.BookBean:create:-1><OtherTest.java:com.hascode.tutorial.service.OtherTest:shouldFailCreateBookWithNoTitleGiven:29><NativeMethodAccessorImpl.java:sun.reflect.NativeMethodAccessorImpl:invoke0:-2><NativeMethodAccessorImpl.java:sun.reflect.NativeMethodAccessorImpl:invoke:62><DelegatingMethodAccessorImpl.java:sun.reflect.DelegatingMethodAccessorImpl:invoke:43><Method.java:java.lang.reflect.Method:invoke:498><FrameworkMethod.java:org.junit.runners.model.FrameworkMethod$1:runReflectiveCall:50><ReflectiveCallable.java:org.junit.internal.runners.model.ReflectiveCallable:run:12><FrameworkMethod.java:org.junit.runners.model.FrameworkMethod:invokeExplosively:47><InvokeMethod.java:org.junit.internal.runners.statements.InvokeMethod:evaluate:17><ExpectException.java:org.junit.internal.runners.statements.ExpectException:evaluate:19><ParentRunner.java:org.junit.runners.ParentRunner:runLeaf:325><BlockJUnit4ClassRunner.java:org.junit.runners.BlockJUnit4ClassRunner:runChild:78><BlockJUnit4ClassRunner.java:org.junit.runners.BlockJUnit4ClassRunner:runChild:57><ParentRunner.java:org.junit.runners.ParentRunner$3:run:290><ParentRunner.java:org.junit.runners.ParentRunner$1:schedule:71><ParentRunner.java:org.junit.runners.ParentRunner:runChildren:288><ParentRunner.java:org.junit.runners.ParentRunner:access$000:58><ParentRunner.java:org.junit.runners.ParentRunner$2:evaluate:268><ParentRunner.java:org.junit.runners.ParentRunner:run:363><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:execute:369><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:executeWithRerun:275><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:executeTestSet:239><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:invoke:160><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:invokeProviderInSameClassLoader:373><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:runSuitesInProcess:334><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:execute:119><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:main:407>]]",11                "[[D][0:<BookBean.java:com.hascode.tutorial.service.BookBean:getAllBooks:-1><OtherTest.java:com.hascode.tutorial.service.OtherTest:testLibrary:60><NativeMethodAccessorImpl.java:sun.reflect.NativeMethodAccessorImpl:invoke0:-2><NativeMethodAccessorImpl.java:sun.reflect.NativeMethodAccessorImpl:invoke:62><DelegatingMethodAccessorImpl.java:sun.reflect.DelegatingMethodAccessorImpl:invoke:43><Method.java:java.lang.reflect.Method:invoke:498><FrameworkMethod.java:org.junit.runners.model.FrameworkMethod$1:runReflectiveCall:50><ReflectiveCallable.java:org.junit.internal.runners.model.ReflectiveCallable:run:12><FrameworkMethod.java:org.junit.runners.model.FrameworkMethod:invokeExplosively:47><InvokeMethod.java:org.junit.internal.runners.statements.InvokeMethod:evaluate:17><ParentRunner.java:org.junit.runners.ParentRunner:runLeaf:325><BlockJUnit4ClassRunner.java:org.junit.runners.BlockJUnit4ClassRunner:runChild:78><BlockJUnit4ClassRunner.java:org.junit.runners.BlockJUnit4ClassRunner:runChild:57><ParentRunner.java:org.junit.runners.ParentRunner$3:run:290><ParentRunner.java:org.junit.runners.ParentRunner$1:schedule:71><ParentRunner.java:org.junit.runners.ParentRunner:runChildren:288><ParentRunner.java:org.junit.runners.ParentRunner:access$000:58><ParentRunner.java:org.junit.runners.ParentRunner$2:evaluate:268><ParentRunner.java:org.junit.runners.ParentRunner:run:363><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:execute:369><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:executeWithRerun:275><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:executeTestSet:239><JUnit4Provider.java:org.apache.maven.surefire.junit4.JUnit4Provider:invoke:160><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:invokeProviderInSameClassLoader:373><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:runSuitesInProcess:334><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:execute:119><ForkedBooter.java:org.apache.maven.surefire.booter.ForkedBooter:main:407>]]"12        };13        MethodSet methods = new MethodSet(Arrays.asList("getAllBooks", "create"));14        StackTraceMonitorMojo mojo = new StackTraceMonitorMojo();15        mojo.targetsForTheAgent = methods;16        for(String line : traces) {17            mojo.processLine(line);18        }19        MethodTracesEntry[] report = mojo.buildReport();20        assertEquals(methods.size(), report.length);21    }22    @Test23    public void testTraceLength() throws Exception {24        MethodSet methods = new MethodSet(Arrays.asList("dummyMethod"));25        StackTraceMonitorMojo mojo = new StackTraceMonitorMojo();...

Source:PlayJUnitRunner.java

...7import org.junit.runner.manipulation.Filter;8import org.junit.runner.manipulation.Filterable;9import org.junit.runner.manipulation.NoTestsRemainException;10import org.junit.runner.notification.RunNotifier;11import org.junit.runners.JUnit4;12import org.junit.runners.model.FrameworkMethod;13import org.junit.runners.model.InitializationError;14import org.junit.runners.model.Statement;15import org.junit.runners.model.TestClass;16import play.Invoker;17import play.Invoker.DirectInvocation;18import play.Play;19public class PlayJUnitRunner extends Runner implements Filterable {20    public static final String invocationType = "JUnitTest";21    public static boolean useCustomRunner = false;22    23    // *******************24    JUnit4 jUnit4;25    public PlayJUnitRunner(Class testClass) throws ClassNotFoundException, InitializationError {26        synchronized (Play.class) {27            if (!Play.started) {28                Play.init(new File("."), PlayJUnitRunner.getPlayId());29                Play.javaPath.add(Play.getVirtualFile("test"));30                // Assure that Play is not start (start can be called in the Play.init method)31                if (!Play.started) {32                    Play.start();33                }34                useCustomRunner = true;35            }36            Class<?> classToRun = Play.classloader.loadApplicationClass(testClass.getName());37            jUnit4 = new JUnit4(classToRun);38        }39    }40    private static String getPlayId() {41        String playId = System.getProperty("play.id", "test");42        if(! (playId.startsWith("test-") && playId.length() >= 6)) {43            playId = "test";44        }45        return playId;46    }47    @Override48    public Description getDescription() {49        return jUnit4.getDescription();50    }51    ...

Source:TestMyBatis.java

...3import org.junit.Test;4import org.junit.runner.RunWith;5import org.springframework.beans.factory.annotation.Autowired;6import org.springframework.test.context.ContextConfiguration;7import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;8import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;9import com.alibaba.fastjson.JSON;10import com.atguigu.p2p.entities.User;11import com.atguigu.p2p.service.UserService;12import java.util.Random;13@RunWith(SpringJUnit4ClassRunner.class)// è¡¨ç¤ºç»§æ¿äºSpringJUnit4ClassRunnerç±»14@ContextConfiguration(locations ={"classpath:/spring/applicationContext.xml"})15//@ContextConfiguration(locations ={"classpath:applicationContext.xml"})16public class TestMyBatis extends AbstractJUnit4SpringContextTests17{18	private static Logger logger = Logger.getLogger(TestMyBatis.class);19	@Autowired20	private UserService userService = null;21	@Test22	public void testSelectByPrimaryKey()23	{24		User user = userService.selectByPrimaryKey(3);25		logger.info("*******>å¼ï¼" + user.toString());26		logger.info("*******>Json å¼ï¼" + JSON.toJSONString(user));27	}	28	29	@Test30	public void testInsertUser()31	{32		int result = userService.insert(new User("æäº"+new Random().nextInt(1000),"123456",22));33	}		34}35/**36org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.atguigu.p2p.service.UserService.selectByPrimaryKey37	at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)38	at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)39	at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)40	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)41	at com.sun.proxy.$Proxy16.selectByPrimaryKey(Unknown Source)42	at com.atguigu.p2p.TestMyBatis.test1(TestMyBatis.java:28)43	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)44	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)45	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)46	at java.lang.reflect.Method.invoke(Method.java:606)47	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)48	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)49	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)50	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)51	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)52	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)53	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)54	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232)55	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)56	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)57	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)58	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)59	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)60	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)61	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)62	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)63	at org.junit.runners.ParentRunner.run(ParentRunner.java:292)64	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175)65	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)66	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)67	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)68	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)69	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)70	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)71 */...

Source:TestParametersNotInitializedTest.java

...17import com.google.errorprone.BugCheckerRefactoringTestHelper;18import com.google.errorprone.CompilationTestHelper;19import org.junit.Test;20import org.junit.runner.RunWith;21import org.junit.runners.JUnit4;22/** Tests for {@link TestParametersNotInitialized}. */23@RunWith(JUnit4.class)24public final class TestParametersNotInitializedTest {25  private final CompilationTestHelper helper =26      CompilationTestHelper.newInstance(TestParametersNotInitialized.class, getClass());27  private final BugCheckerRefactoringTestHelper refactoringHelper =28      BugCheckerRefactoringTestHelper.newInstance(TestParametersNotInitialized.class, getClass());29  @Test30  public void positive() {31    refactoringHelper32        .addInputLines(33            "Test.java",34            "import com.google.testing.junit.testparameterinjector.TestParameter;",35            "import org.junit.runner.RunWith;",36            "import org.junit.runners.JUnit4;",37            "@RunWith(JUnit4.class)",38            "public class Test {",39            "  @TestParameter public boolean foo;",40            "}")41        .addOutputLines(42            "Test.java",43            "import com.google.testing.junit.testparameterinjector.TestParameter;",44            "import com.google.testing.junit.testparameterinjector.TestParameterInjector;",45            "import org.junit.runner.RunWith;",46            "import org.junit.runners.JUnit4;",47            "@RunWith(TestParameterInjector.class)",48            "public class Test {",49            "  @TestParameter public boolean foo;",50            "}")51        .doTest();52  }53  @Test54  public void onlyFlagsJunit4Runner() {55    refactoringHelper56        .addInputLines(57            "MyRunner.java",58            "import org.junit.runners.BlockJUnit4ClassRunner;",59            "import org.junit.runners.model.InitializationError;",60            "public final class MyRunner extends BlockJUnit4ClassRunner {",61            "  public MyRunner(Class<?> testClass) throws InitializationError {",62            "    super(testClass);",63            "  }",64            "}")65        .expectUnchanged()66        .addInputLines(67            "Test.java",68            "import com.google.testing.junit.testparameterinjector.TestParameter;",69            "import org.junit.runner.RunWith;",70            "import org.junit.runners.JUnit4;",71            "@RunWith(MyRunner.class)",72            "public class Test {",73            "  @TestParameter public boolean foo;",74            "}")75        .expectUnchanged()76        .doTest();77  }78  @Test79  public void alreadyParameterized_noFinding() {80    helper81        .addSourceLines(82            "Test.java",83            "import com.google.testing.junit.testparameterinjector.TestParameter;",84            "import com.google.testing.junit.testparameterinjector.TestParameterInjector;",85            "import org.junit.runner.RunWith;",86            "@RunWith(TestParameterInjector.class)",87            "public class Test {",88            "  @TestParameter public boolean foo;",89            "}")90        .doTest();91  }92  @Test93  public void noParameters_noFinding() {94    helper95        .addSourceLines(96            "Test.java",97            "import org.junit.runner.RunWith;",98            "import org.junit.runners.JUnit4;",99            "@RunWith(JUnit4.class)",100            "public class Test {",101            "}")102        .doTest();103  }104}...

Source:StaticMockMemberTest.java

...17import com.google.errorprone.BugCheckerRefactoringTestHelper;18import com.google.errorprone.CompilationTestHelper;19import org.junit.Test;20import org.junit.runner.RunWith;21import org.junit.runners.JUnit4;22/**23 * Unit tests for {@link StaticMockMember} bug pattern.24 *25 * @author bhagwani@google.com (Sumit Bhagwani)26 */27@RunWith(JUnit4.class)28public class StaticMockMemberTest {29  private final BugCheckerRefactoringTestHelper testHelper =30      BugCheckerRefactoringTestHelper.newInstance(StaticMockMember.class, getClass());31  private final CompilationTestHelper compilationHelper =32      CompilationTestHelper.newInstance(StaticMockMember.class, getClass());33  @Test34  public void testPositiveCases() {35    testHelper36        .addInputLines(37            "in/Test.java",38            "import org.junit.runner.RunWith;",39            "import org.junit.runners.JUnit4;",40            "import org.mockito.Mock;",41            "@RunWith(JUnit4.class)",42            "public class Test {",43            "  @Mock private static String mockedPrivateString;",44            "  @Mock static String mockedString;",45            "}")46        .addOutputLines(47            "out/Test.java",48            "import org.junit.runner.RunWith;",49            "import org.junit.runners.JUnit4;",50            "import org.mockito.Mock;",51            "@RunWith(JUnit4.class)",52            "public class Test {",53            "  @Mock private String mockedPrivateString;",54            "  @Mock String mockedString;",55            "}")56        .doTest();57  }58  @Test59  public void testNegativeCases() {60    compilationHelper61        .addSourceLines(62            "in/Test.java",63            "import org.junit.runner.RunWith;",64            "import org.junit.runners.JUnit4;",65            "import org.mockito.Mock;",66            "@RunWith(JUnit4.class)",67            "public class Test {",68            "  @Mock private String mockedPrivateString;",69            "  @Mock String mockedString;",70            "}")71        .doTest();72  }73  @Test74  public void memberSuppression() {75    compilationHelper76        .addSourceLines(77            "in/Test.java",78            "import org.junit.runner.RunWith;",79            "import org.junit.runners.JUnit4;",80            "import org.mockito.Mock;",81            "@RunWith(JUnit4.class)",82            "public class Test {",83            "  @SuppressWarnings(\"StaticMockMember\")",84            "  @Mock private static String mockedPrivateString;",85            "}")86        .doTest();87  }88  @Test89  public void flagIfRemovingStaticWontCompile() {90    compilationHelper91        .addSourceLines(92            "in/Test.java",93            "import org.junit.runner.RunWith;",94            "import org.junit.runners.JUnit4;",95            "import org.mockito.Mock;",96            "@RunWith(JUnit4.class)",97            "public class Test {",98            "  // BUG: Diagnostic contains: StaticMockMember",99            "  @Mock private static String mockedPrivateString;",100            "  static String someStaticMethod() {",101            "    return mockedPrivateString;",102            "  }",103            "}")104        .doTest();105  }106}...

Source:TheoryButNoTheoriesTest.java

...17import com.google.errorprone.BugCheckerRefactoringTestHelper;18import com.google.errorprone.CompilationTestHelper;19import org.junit.Test;20import org.junit.runner.RunWith;21import org.junit.runners.JUnit4;22/** Tests for {@link TheoryButNoTheories}. */23@RunWith(JUnit4.class)24public final class TheoryButNoTheoriesTest {25  private final CompilationTestHelper helper =26      CompilationTestHelper.newInstance(TheoryButNoTheories.class, getClass());27  private final BugCheckerRefactoringTestHelper refactoringHelper =28      BugCheckerRefactoringTestHelper.newInstance(TheoryButNoTheories.class, getClass());29  @Test30  public void positive() {31    refactoringHelper32        .addInputLines(33            "Test.java",34            "import org.junit.experimental.theories.Theory;",35            "import org.junit.runner.RunWith;",36            "import org.junit.runners.JUnit4;",37            "@RunWith(JUnit4.class)",38            "public class Test {",39            "  @Theory public void test() {}",40            "}")41        .addOutputLines(42            "Test.java",43            "import org.junit.experimental.theories.Theories;",44            "import org.junit.experimental.theories.Theory;",45            "import org.junit.runner.RunWith;",46            "import org.junit.runners.JUnit4;",47            "@RunWith(Theories.class)",48            "public class Test {",49            "  @Theory public void test() {}",50            "}")51        .doTest();52  }53  @Test54  public void alreadyParameterized_noFinding() {55    helper56        .addSourceLines(57            "Test.java",58            "import org.junit.experimental.theories.Theories;",59            "import org.junit.experimental.theories.Theory;",60            "import org.junit.runner.RunWith;",61            "import org.junit.runners.JUnit4;",62            "@RunWith(Theories.class)",63            "public class Test {",64            "  @Theory public void test() {}",65            "}")66        .doTest();67  }68  @Test69  public void noParameters_noFinding() {70    helper71        .addSourceLines(72            "Test.java",73            "import org.junit.runner.RunWith;",74            "import org.junit.runners.JUnit4;",75            "@RunWith(JUnit4.class)",76            "public class Test {",77            "}")78        .doTest();79  }80}...

Source:ParametersButNotParameterizedTest.java

...17import com.google.errorprone.BugCheckerRefactoringTestHelper;18import com.google.errorprone.CompilationTestHelper;19import org.junit.Test;20import org.junit.runner.RunWith;21import org.junit.runners.JUnit4;22/** Tests for {@link ParametersButNotParameterized}. */23@RunWith(JUnit4.class)24public final class ParametersButNotParameterizedTest {25  private final CompilationTestHelper helper =26      CompilationTestHelper.newInstance(ParametersButNotParameterized.class, getClass());27  private final BugCheckerRefactoringTestHelper refactoringHelper =28      BugCheckerRefactoringTestHelper.newInstance(ParametersButNotParameterized.class, getClass());29  @Test30  public void positive() {31    refactoringHelper32        .addInputLines(33            "Test.java",34            "import org.junit.runner.RunWith;",35            "import org.junit.runners.JUnit4;",36            "import org.junit.runners.Parameterized.Parameter;",37            "@RunWith(JUnit4.class)",38            "public class Test {",39            "  @Parameter public int foo;",40            "}")41        .addOutputLines(42            "Test.java",43            "import org.junit.runner.RunWith;",44            "import org.junit.runners.JUnit4;",45            "import org.junit.runners.Parameterized;",46            "import org.junit.runners.Parameterized.Parameter;",47            "@RunWith(Parameterized.class)",48            "public class Test {",49            "  @Parameter public int foo;",50            "}")51        .doTest();52  }53  @Test54  public void alreadyParameterized_noFinding() {55    helper56        .addSourceLines(57            "Test.java",58            "import org.junit.runner.RunWith;",59            "import org.junit.runners.Parameterized;",60            "import org.junit.runners.Parameterized.Parameter;",61            "@RunWith(Parameterized.class)",62            "public class Test {",63            "  @Parameter public int foo;",64            "}")65        .doTest();66  }67  @Test68  public void noParameters_noFinding() {69    helper70        .addSourceLines(71            "Test.java",72            "import org.junit.runner.RunWith;",73            "import org.junit.runners.JUnit4;",74            "@RunWith(JUnit4.class)",75            "public class Test {",76            "}")77        .doTest();78  }79}...

JUnit4

Using AI Code Generation

1import org.junit.runners.JUnit4;2import org.junit.runner.RunWith;3import org.junit.runner.JUnitCore;4import org.junit.Test;5import org.junit.Assert;6import org.junit.BeforeClass;7import org.junit.AfterClass;8import org.junit.Before;9import org.junit.After;10import org.junit.Ignore;11import org.junit.Rule;12import org.junit.rules.TestName;13import org.junit.rules.ExpectedException;14import org.junit.rules.Timeout;15import org.junit.rules.TestWatcher;16import org.junit.runner.Description;17import org.junit.runner.notification.Failure;18import org.junit.runner.notification.RunListener;19import org.junit.runner.Result;20import org.junit.runner.notification.RunNotifier;21import org.junit.runner.Request;22import org.junit.runner.notification.StoppedByUserException;23import org.junit.runner.notification.Failure;24import org.junit.runner.notification.RunListener;25import org.junit.runner.Result;26import org.junit.runner.notification.RunNotifier;27import org.junit.runner

JUnit4

Using AI Code Generation

1import org.junit.Test;2import org.junit.runner.RunWith;3import org.junit.runners.JUnit4;4@RunWith(JUnit4.class)5public class TestClass {6   public void testMethod() {7      System.out.println("Test method executed");8   }9}

JUnit4

Using AI Code Generation

1@RunWith(JUnit4.class)2public class TestClass {3}4@RunWith(JUnit4.class)5public class TestClass {6}7@RunWith(JUnit4.class)8public class TestClass {9}

Source: How do you assert that a certain exception is thrown in JUnit 4 tests?

1/**2 * A SocketImpl implementation which works on a pair3 * of streams.4 *5 * A instance of this class represents an already6 * connected socket, thus all the methods relating to7 * connecting, accepting and such are not implemented.8 *9 * The implemented methods are {@link #getInputStream},10 * {@link #getOutputStream}, {@link #available} and the11 * shutdown methods {@link #close}, {@link #shutdownInput},12 * {@link #shutdownOutput}.13 */14private static class WrappingSocketImpl extends SocketImpl {15    private InputStream inStream;16    private OutputStream outStream;1718    private Socket base;1920    WrappingSocketImpl(StreamPair pair, Socket base) {21        this.inStream = pair.input;22        this.outStream = pair.output;23        this.base = base;24    }25

Source:How do you assert that a certain exception is thrown in JUnit 4 tests?

/**
 * A SocketImpl implementation which works on a pair
 * of streams.
 *
 * A instance of this class represents an already
 * connected socket, thus all the methods relating to
 * connecting, accepting and such are not implemented.
 *
 * The implemented methods are {@link #getInputStream},
 * {@link #getOutputStream}, {@link #available} and the
 * shutdown methods {@link #close}, {@link #shutdownInput},
 * {@link #shutdownOutput}.
 */
private static class WrappingSocketImpl extends SocketImpl {
    private InputStream inStream;
    private OutputStream outStream;

    private Socket base;

    WrappingSocketImpl(StreamPair pair, Socket base) {
        this.inStream = pair.input;
        this.outStream = pair.output;
        this.base = base;
    }

Source: How do you assert that a certain exception is thrown in JUnit 4 tests?

1try{}2catch(Exception e) {Logger.logExceptionToDatabase(e); }3

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

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.