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How to use MockitoExtension class of org.mockito.junit.jupiter package

Best Mockito code snippet using org.mockito.junit.jupiter.MockitoExtension

Source:MockitoAnnotatedObjectsShouldBeInitialized.java

...21import org.mockito.Spy;22import org.mockito.junit.MockitoJUnit;23import org.mockito.junit.MockitoJUnitRunner;24import org.mockito.junit.MockitoRule;25import org.mockito.junit.jupiter.MockitoExtension;26import org.mockito.junit.jupiter.MockitoSettings;27import org.mockito.quality.Strictness;28public class MockitoAnnotatedObjectsShouldBeInitialized {29  class MixedNonCompliant {30    @Mock // Noncompliant {{Initialize mocks before using them.}}31    private Bar bar;32    @Spy // Issue is only reported on the first annotation33    private Baz baz;34    @InjectMocks // Issue is only reported on the first annotation35    private Foo fooUnderTest;36    @Test37    void someTest() {38      // test something ...39    }40  }41  @RunWith(EmptyRunner.class)42  public class RunWithBadParameter {43    @Mock // Compliant FN is a runner that does not initialize anything44    private Bar bar;45  }46  @RunWith(Runner.class)47  public class RunWithAbstractRunner {48    @Mock // Compliant FN is a runner that but not a concrete one49    private Bar bar;50  }51  @Nullable52  public class IrrelevantAnnotationOnClass {53    @Mock // Noncompliant54    private Bar bar;55  }56  @RunWith(MockitoJUnitRunner.class)57  public class JUnit4AnnotatedTest {58    @Mock // Compliant59    private Bar bar;60  }61  @ExtendWith(EmptyExtension.class)62  public class ExtendWithEmptyParameter {63    @Mock // Compliant FN is an extension that does not initialize anything64    private Bar bar;65  }66  @ExtendWith(Extension.class)67  public class ExtendWithAbstractExtension {68    @Mock // Compliant FN use the base interface69    private Bar bar;70  }71  @ExtendWith(MockitoExtension.class)72  public class JUnit5AnnotatedTest {73    @Mock // Compliant74    private Bar bar;75  }76  public class UntaggedRule {77    public MockitoRule rule = MockitoJUnit.rule();78    @Mock // Noncompliant {{Initialize mocks before using them.}}79    private Bar bar;80  }81  public class UninitializedRule {82    @Rule83    public MockitoRule rule;84    @Mock // Noncompliant {{Initialize mocks before using them.}}85    private Bar bar;86  }87  public class NullInitializedRule {88    @Rule89    public MockitoRule rule = null;90    @Mock // Noncompliant {{Initialize mocks before using them.}}91    private Bar bar;92  }93  public class PoorlyInitializedRule {94    @Rule95    public MockitoRule rule = FakeRule.returnNull();96    @Mock // Noncompliant {{Initialize mocks before using them.}}97    private Bar bar;98  }99  public class FakeRuleInitialization {100    @Rule101    public MockitoRule rule = FakeRule.rule();102    @Mock // Noncompliant {{Initialize mocks before using them.}}103    private Bar bar;104  }105  public class FooTest2 {106    @Rule107    public MockitoRule rule = MockitoJUnit.rule();108    @Mock // Compliant109    private Bar bar;110  }111  public class InheritedRuleProviderInitialization {112    @Rule113    public MockitoRule rule = InheritedRuleProvider.rule();114    @Mock // Compliant115    private Bar bar;116  }117  public class MockitoRuleWithTheStrictness {118    @Rule119    public MockitoRule mockitoRule = MockitoJUnit.rule().strictness(Strictness.STRICT_STUBS);120    @Mock // Compliant121    private Bar bar;122    @Test123    public void someTest() {124      // ...125    }126  }127  public class MockitoRuleWrongStaticMethod {128    @Rule129    public MockitoRule rule = foo();130    @Mock // Noncompliant  {{Initialize mocks before using them.}}131    private Bar bar;132    private MockitoRule foo() { return null; }133  }134  public class UntaggedSetup {135    @Mock // Noncompliant {{Initialize mocks before using them.}}136    private Bar bar;137    void setUp() {138      MockitoAnnotations.initMocks(this);139    }140  }141  public class SetupWithoutInitMocks {142    @Mock // Noncompliant {{Initialize mocks before using them.}}143    private Bar bar;144    @BeforeEach145    void setUp() {146      System.out.println("No call to initMocks");147    }148  }149  public class EmptySetup {150    @Mock // Noncompliant {{Initialize mocks before using them.}}151    private Bar bar;152    @BeforeEach153    void setUp() {154    }155  }156  public class SetupJunit4 {157    @Mock // compliant158    private Bar bar;159    @Before160    void setUp() {161      MockitoAnnotations.initMocks(this);162    }163  }164  public class SetupJUnit5 {165    @Mock // Compliant166    private Bar bar;167    @BeforeEach168    void setUp() {169      MockitoAnnotations.openMocks(this);170    }171  }172  public class SetupMix {173    @Mock // Compliant174    private Bar bar;175    @BeforeEach176    void setUp() {177      MockitoAnnotations.initMocks(this);178    }179  }180  class SetupInBaseClass {181    @BeforeEach182    void baseSetUp() {183      MockitoAnnotations.initMocks(this);184    }185  }186  class MockInChild extends SetupInBaseClass {187    @Mock // Compliant188    private Bar bar;189  }190  class NoSetup {191  }192  class MockInGrandChild extends NoSetup {193    @Mock // Compliant FN Super classes are not explored194    private Bar bar;195  }196  @ExtendWith(MockitoExtension.class)197  public class Nesting {198    @org.junit.jupiter.api.Nested199    public class Nested {200      @Mock201      private Bar bar;202    }203    public class NestedAsWell {204      @Mock // Noncompliant205      private Bar bar;206      @org.junit.jupiter.api.Nested207      public class NestedFurther {208        @Mock209        private Bar bar;210      }211    }212  }213  @RunWith(MockitoJUnitRunner.class)214  public class NestingWithWrongAnnotation {215    @Nested216    public class NestedButNotAnnotated {217      @Mock // Noncompliant218      private Bar bar;219    }220    public class NestedAsWellButAnnotated {221      @Nested222      public class NestedFurther {223        @Mock // Noncompliant224        private Bar bar;225      }226    }227  }228  public class NestingButNotAnnotated {229    public class NestedButNotAnnotated {230      @Mock // Noncompliant231      private Bar bar;232    }233    @ExtendWith(MockitoExtension.class)234    public class NestedAsWellButAnnotated {235      @org.junit.jupiter.api.Nested236      public class NestedFurther {237        @Mock238        private Bar bar;239      }240    }241  }242  private class Bar {243  }244  private class Baz {245  }246  private class Foo {247  }248  private static class EmptyRunner extends org.junit.runner.Runner {249    @Override250    public Description getDescription() {251      return null;252    }253    @Override254    public void run(RunNotifier runNotifier) {255    }256  }257  private static class EmptyExtension implements Extension {258  }259  private static class InheritedRuleProvider extends MockitoJUnit {260  }261  private static class FakeRule {262    static MockitoRule rule() {263      return null;264    }265    static MockitoRule returnNull() {266      return null;267    }268  }269  // Meta annotations270  @ExtendWith(MockitoExtension.class)271  public @interface SetupItTest272  {273  }274  @SetupItTest275  class SetUpViaMetaAnnotation {276    @Captor277    private ArgumentCaptor<String> someCaptor; // Compliant, ExtendWith setup via meta annotation278  }279  @MockitoSettings280  class SetUpViaMockitoSettings {281    @Captor private ArgumentCaptor<String> someCaptor; // Compliant, MockitoSettings is a meta annotation containing @ExtendWith({MockitoExtension.class})282  }283  @LoopB284  public @interface LoopA285  {286  }287  @LoopC288  public @interface LoopB289  {290  }291  @LoopA292  public @interface LoopC293  {294  }295  @LoopA296  class LoopInAnnotation {297    @Captor private ArgumentCaptor<String> someCaptor; // Noncompliant298  }299  // Meta annotations300  public @interface UnRelatedAnnotation301  {302  }303  @UnRelatedAnnotation304  @ExtendWith(MockitoExtension.class)305  class WithUnrelatedAnnotation1 {306    @Captor private ArgumentCaptor<String> someCaptor; // Compliant307  }308  @ExtendWith(MockitoExtension.class)309  @UnRelatedAnnotation310  class WithUnrelatedAnnotation2 {311    @Captor private ArgumentCaptor<String> someCaptor; // Compliant312  }313}...

Source:ClientRepositoryTest.java

...5import org.junit.runner.RunWith;6import org.mockito.Mock;7import org.mockito.Mockito;8import org.mockito.junit.MockitoJUnitRunner;9import org.mockito.junit.jupiter.MockitoExtension;10import java.util.Optional;11import static org.junit.jupiter.api.Assertions.*;12import org.junit.jupiter.api.Test;13import org.junit.jupiter.api.extension.ExtendWith;14import org.junit.runner.RunWith;15import org.mockito.Mock;16import org.mockito.Mockito;17import org.mockito.junit.MockitoJUnitRunner;18import org.mockito.junit.jupiter.MockitoExtension;19import java.util.ArrayList;20import java.util.List;21import java.util.Optional;22import static org.junit.jupiter.api.Assertions.*;23import static org.assertj.core.api.Assertions.assertThat;24@ExtendWith(MockitoExtension.class)25@RunWith(MockitoJUnitRunner.Silent.class)26class ClientRepositoryTest {27    @Mock28    private ClientRepository clientRepository;29    @Test30    void findByEmail() {31        Client client1 = new Client(1L, "test1@gmail.com","0659697087","test1",12,"F",true);32        Mockito.when(clientRepository.findByEmail("test1@gmail.com")).thenReturn(Optional.of(client1));33        assertThat(clientRepository.findByEmail("test1@gmail.com").get().getEmail()).isEqualTo("test1@gmail.com");34    }35   /* @Test36    void findByGender() {37        Client client1 = new Client(1L, "test1@gmail.com","0659697087","test1",12,"F",true);38        Client client2 = new Client(1L, "test1@gmail.com","0659697087","test1",12,"F",true);...

Source:CategoryServiceImplTest.java

...8import org.junit.jupiter.api.extension.ExtendWith;9import org.mockito.InjectMocks;10import org.mockito.Mock;11import org.mockito.Mockito;12import org.mockito.junit.jupiter.MockitoExtension;13import org.mockito.junit.jupiter.MockitoSettings;14import org.mockito.quality.Strictness;15@ExtendWith(MockitoExtension.class)16@MockitoSettings(strictness = Strictness.LENIENT)17class CategoryServiceImplTest {18    @Mock19    CategoryRepository categoryRepository;20    @InjectMocks21    CategoryServiceImpl categoryService;22    private static final Category category = new Category();23    @BeforeAll24    static void createCategory() {25        category.setCategoryName("History");26        category.setBooks(null);27    }28    @BeforeEach29    void setMockOutput(){...

MockitoExtension

Using AI Code Generation

1import static org.junit.jupiter.api.Assertions.assertEquals;2import static org.mockito.Mockito.when;3import org.junit.jupiter.api.Test;4import org.junit.jupiter.api.extension.ExtendWith;5import org.mockito.InjectMocks;6import org.mockito.Mock;7import org.mockito.junit.jupiter.MockitoExtension;8@ExtendWith(MockitoExtension.class)9public class MockitoExtensionTest {10    private Dependency dependency;11    private SystemUnderTest systemUnderTest;12    public void test() {13        when(dependency.retrieveAllStats()).thenReturn(new int[] { 1, 2, 3 });14        assertEquals(6, systemUnderTest.methodUsingAnArrayListConstructor());15    }16}17import static org.junit.jupiter.api.Assertions.assertEquals;18import static org.mockito.Mockito.when;19import org.junit.jupiter.api.Test;20import org.junit.jupiter.api.extension.ExtendWith;21import org.mockito.InjectMocks;22import org.mockito.Mock;23import org.mockito.junit.jupiter.MockitoExtension;24@ExtendWith(MockitoExtension.class)25public class MockitoExtensionTest {26    private Dependency dependency;27    private SystemUnderTest systemUnderTest;28    public void test() {29        when(dependency.retrieveAllStats()).thenReturn(new int[] { 1, 2, 3 });30        assertEquals(6, systemUnderTest.methodUsingAnArrayListConstructor());31    }32}

MockitoExtension

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.extension.ExtendWith;3import org.mockito.InjectMocks;4import org.mockito.Mock;5import org.mockito.junit.jupiter.MockitoExtension;6import static org.junit.jupiter.api.Assertions.assertEquals;7import static org.mockito.Mockito.when;8@ExtendWith(MockitoExtension.class)9public class MockitoExtensionTest {10    private Collaborator collaborator;11    private ClassUnderTest classUnderTest;12    public void test() {13        when(collaborator.doSomething()).thenReturn("hello world");14        assertEquals("hello world", classUnderTest.doSomething());15    }16}

MockitoExtension

Using AI Code Generation

1import static org.junit.jupiter.api.Assertions.*;2import static org.mockito.Mockito.*;3import org.junit.jupiter.api.Test;4import org.junit.jupiter.api.extension.ExtendWith;5import org.mockito.Mock;6import org.mockito.junit.jupiter.MockitoExtension;7@ExtendWith(MockitoExtension.class)8class MockitoExtensionTest {9    private MyService myService;10    public void testMock() {11        when(myService.get()).thenReturn("Hello");12        assertEquals("Hello", myService.get());13    }14}15import static org.junit.jupiter.api.Assertions.*;16import static org.mockito.Mockito.*;17import org.junit.jupiter.api.Test;18import org.mockito.Mock;19class MockitoAnnotationTest {20    private MyService myService;21    public void testMock() {22        when(myService.get()).thenReturn("Hello");23        assertEquals("Hello", myService.get());24    }25}26import static org.junit.jupiter.api.Assertions.*;27import static org.mockito.Mockito.*;28import org.junit.jupiter.api.Test;29import org.mockito.Mock;30import org.mockito.MockitoAnnotations;31class MockitoInitTest {32    private MyService myService;33    public MockitoInitTest() {34        MockitoAnnotations.initMocks(this);35    }36    public void testMock() {37        when(myService.get()).thenReturn("Hello");38        assertEquals("Hello", myService.get());39    }40}41import static org.junit.jupiter.api.Assertions.*;42import static org.mockito.Mockito.*;43import org.junit.jupiter.api.Test;44import org.junit.runner.RunWith;45import org.mockito.Mock;46import org.mockito.junit.MockitoJUnitRunner;47@RunWith(MockitoJUnitRunner.class)48class MockitoRunWithTest {49    private MyService myService;50    public void testMock() {51        when(myService.get()).thenReturn("Hello");52        assertEquals("Hello", myService.get());53    }54}55import static org.junit.jupiter.api.Assertions.*;56import static org.mockito.Mockito.*;57import org.junit.jupiter.api.Test;58import org.junit.Rule;59import org.mockito.Mock;60import org.mockito.junit.MockitoJUnit;61import org.mockito.junit.MockitoRule;

MockitoExtension

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.extension.ExtendWith;3import org.mockito.Mock;4import org.mockito.junit.jupiter.MockitoExtension;5import static org.junit.jupiter.api.Assertions.assertEquals;6import static org.mockito.Mockito.when;7@ExtendWith(MockitoExtension.class)8public class MockitoExtensionTest {9    private Person person;10    public void testMock() {11        when(person.getName()).thenReturn("John");12        assertEquals("John", person.getName());13    }14}15│     └─ testMock() ✔16public class Person {17    private String name;18    public String getName() {19        return name;20    }21}

MockitoExtension

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.extension.ExtendWith;3import org.mockito.Mock;4import org.mockito.junit.jupiter.MockitoExtension;5import static org.junit.jupiter.api.Assertions.assertEquals;6import static org.mockito.Mockito.when;7@ExtendWith(MockitoExtension.class)8public class MockitoExtensionTest {9   private MathApplication mathApplication;10   public void testAdd() {11      when(mathApplication.add(10.0,20.0)).thenReturn(30.0);12      assertEquals(mathApplication.add(10.0, 20.0),30.0,0);13   }14}15│  │  └─ testAdd() ✔16│     └─ testAdd() ✔17      └─ testAdd() ✔

MockitoExtension

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.extension.ExtendWith;3import org.mockito.Mock;4import org.mockito.junit.jupiter.MockitoExtension;5import java.util.List;6import static org.junit.jupiter.api.Assertions.assertEquals;7import static org.mockito.Mockito.when;8@ExtendWith(MockitoExtension.class)9public class MockitoExtensionTest {10    List<String> mockList;11    public void testMock() {12        when(mockList.size()).thenReturn(10);13        assertEquals(10, mockList.size());14    }15}16C:\Users\javatpoint>javac -cp .;junit-4.12.jar;hamcrest-core-1.3.jar;mockito-core-1.10.19.jar 1.java17C:\Users\javatpoint>java -cp .;junit-4.12.jar;hamcrest-core-1.3.jar;mockito-core-1.10.19.jar org.junit.runner.JUnitCore MockitoExtensionTest18OK (1 test)

MockitoExtension

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.extension.ExtendWith;3import org.mockito.Mock;4import org.mockito.junit.jupiter.MockitoExtension;5import static org.mockito.Mockito.when;6@ExtendWith(MockitoExtension.class)7public class MockitoExtensionTest {8    private MathApplication mathApplication;9    public void testAdd() {10        when(mathApplication.add(10,20)).thenReturn(30);11        when(mathApplication.add(20,20)).thenReturn(40);12        when(mathApplication.add(30,20)).thenReturn(50);13        System.out.println("Addition of 10 and 20 is " + mathApplication.add(10,20));14        System.out.println("Addition of 20 and 20 is " + mathApplication.add(20,20));15        System.out.println("Addition of 30 and 20 is " + mathApplication.add(30,20));16    }17}

MockitoExtension

Using AI Code Generation

1import org.mockito.junit.jupiter.MockitoExtension;2import org.junit.jupiter.api.extension.ExtendWith;3import org.junit.jupiter.api.Test;4import org.junit.jupiter.api.BeforeEach;5import static org.junit.jupiter.api.Assertions.assertEquals;6import static org.mockito.Mockito.*;7@ExtendWith(MockitoExtension.class)8public class TestJunit5 {9    private List<String> mockList;10    public void testMockList() {11        mockList.add("one");12        verify(mockList).add("one");13        assertEquals(0, mockList.size());14        when(mockList.size()).thenReturn(100);15        assertEquals(100, mockList.size());16    }17}18TestJunit5 > testMockList() STANDARD_OUT

MockitoExtension

Using AI Code Generation

1import org.mockito.junit.jupiter.MockitoExtension;2import org.junit.jupiter.api.extension.ExtendWith;3import org.junit.jupiter.api.Test;4import static org.junit.jupiter.api.Assertions.assertEquals;5import static org.mockito.Mockito.mock;6import static org.mockito.Mockito.when;7import static org.mockito.Mockito.verify;8import static org.mockito.Mockito.times;9import static org.mockito.Mockito.anyInt;10import static org.mockito.Mockito.anyString;11import static org.mockito.Mockito.doThrow;12import static org.mockito.Mockito.doNothing;13import static org.mockito.Mockito.doAnswer;14import static org.mockito.Mockito.spy;15import static org.mockito.Mockito.never;16import static org.mockito.Mockito.atLeast;17import static org.mockito.Mockito.atLeastOnce;18import static org.mockito.Mockito.atMost;19import static org.mockito.Mockito.timeout;20import static org.mockito.Mockito.timeout;21import static org.mockito.Mockito.only;22import static org.mockito.Mockito.inOrder;23import static org.mockito.Mockito.verifyNoMoreInteractions;24import static org.mockito.Mockito.verifyNoInteractions;25import static org.mockito.Mockito.reset;26import static org.mockito.Mockito.spy;27import static org.mockito.Mockito.when;28import static org.mockito.Mockito.doReturn;29import static org.mockito.Mockito.doThrow;30import static org.mockito.Mockito.doAnswer;31import static org.mockito.Mockito.doNothing;32import static org.mockito.Mockito.verify;33import static org.mockito.Mockito.mock;34import static org.mockito.Mockito.spy;35import static org.mockito.Mockito.verify;36import static org.mockito.Mockito.doReturn;37import static org.mockito.Mockito.doThrow;38import static org.mockito.Mockito.doAnswer;39import static org.mockito.Mockito.doNothing;40import static org.mockito.Mockito.mock;41import static org.mockito.Mockito.spy;42import static org.mockito.Mockito.verify;43import static org.mockito.Mockito.doReturn;44import static org.mockito.Mockito.doThrow;45import static org.mockito.Mockito.doAnswer;46import static org.mockito.Mockito.doNothing;47import static org.mockito.Mockito.mock;48import static org.mockito.Mockito.spy;49import static org.mockito.Mockito.verify;50import static org.mockito.Mockito.doReturn;51import static org.mockito.Mockito.doThrow;52import static org.mockito.Mockito.doAnswer;53import static org.mockito.Mockito.doNothing;54import static org.mockito.Mockito.mock;55import static org.mockito.Mockito.spy;56import static org.mockito.Mockito.verify;57import static org.mockito.Mockito.doReturn;58import static org.mockito.Mockito.doThrow;59import static org.mockito.Mockito.doAnswer;60import static org.mockito.Mockito.doNothing;61import static org.mockito.Mockito.mock;62import static org.mockito.Mockito.spy;63import static org.mockito.Mockito.verify;64import static org.mockito.Mockito.doReturn;65import

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