How to use Stubber class of org.mockito.stubbing package

Best Mockito code snippet using org.mockito.stubbing.Stubber

Source:BDDMockito.java Github

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...5package org.mockito;67import org.mockito.stubbing.Answer;8import org.mockito.stubbing.OngoingStubbing;9import org.mockito.stubbing.Stubber;1011/**12 * Behavior Driven Development style of writing tests uses <b>//given //when //then</b> comments as fundamental parts of your test methods.13 * This is exactly how we write our tests and we warmly encourage you to do so!14 * <p>15 * Start learning about BDD here: <a href="http://en.wikipedia.org/wiki/Behavior_Driven_Development">http://en.wikipedia.org/wiki/Behavior_Driven_Development</a>16 * <p>17 * The problem is that current stubbing api with canonical role of <b>when</b> word does not integrate nicely with <b>//given //when //then</b> comments.18 * It's because stubbing belongs to <b>given</b> component of the test and not to the <b>when</b> component of the test. 19 * Hence {@link BDDMockito} class introduces an alias so that you stub method calls with {@link BDDMockito#given(Object)} method. 20 * Now it really nicely integrates with the <b>given</b> component of a BDD style test! 21 * <p>22 * Here is how the test might look like: 23 * <pre>24 * import static org.mockito.BDDMockito.*;25 * 26 * Seller seller = mock(Seller.class);27 * Shop shop = new Shop(seller);28 * 29 * public void shouldBuyBread() throws Exception {30 * //given 31 * given(seller.askForBread()).willReturn(new Bread());32 * 33 * //when34 * Goods goods = shop.buyBread();35 * 36 * //then37 * assertThat(goods, containBread());38 * } 39 * </pre>40 * 41 * Stubbing voids with throwables:42 * <pre>43 * //given44 * willThrow(new RuntimeException("boo")).given(mock).foo();45 * 46 * //when47 * Result result = systemUnderTest.perform();48 * 49 * //then50 * assertEquals(failure, result);51 * </pre>52 * <p>53 * One of the purposes of BDDMockito is also to show how to tailor the mocking syntax to a different programming style. 54 */55@SuppressWarnings("unchecked")56public class BDDMockito extends Mockito {57 58 /**59 * See original {@link OngoingStubbing}60 */61 public static interface BDDMyOngoingStubbing<T> {62 63 /**64 * See original {@link OngoingStubbing#thenAnswer(Answer)}65 */66 BDDMyOngoingStubbing<T> willAnswer(Answer<?> answer);67 68 /**69 * See original {@link OngoingStubbing#thenReturn(Object)}70 */71 BDDMyOngoingStubbing<T> willReturn(T value);72 73 /**74 * See original {@link OngoingStubbing#thenReturn(Object, Object...)}75 */76 BDDMyOngoingStubbing<T> willReturn(T value, T... values);77 78 /**79 * See original {@link OngoingStubbing#thenThrow(Throwable...)}80 */81 BDDMyOngoingStubbing<T> willThrow(Throwable... throwables);8283 /**84 * See original {@link OngoingStubbing#thenCallRealMethod()}85 */86 BDDMyOngoingStubbing<T> willCallRealMethod();87 }88 89 public static class BDDOngoingStubbingImpl<T> implements BDDMyOngoingStubbing<T> {9091 private final OngoingStubbing<T> mockitoOngoingStubbing;9293 public BDDOngoingStubbingImpl(OngoingStubbing<T> ongoingStubbing) {94 this.mockitoOngoingStubbing = ongoingStubbing;95 }9697 /* (non-Javadoc)98 * @see org.mockitousage.customization.BDDMockito.BDDMyOngoingStubbing#willAnswer(org.mockito.stubbing.Answer)99 */100 public BDDMyOngoingStubbing<T> willAnswer(Answer<?> answer) {101 return new BDDOngoingStubbingImpl<T>(mockitoOngoingStubbing.thenAnswer(answer));102 }103104 /* (non-Javadoc)105 * @see org.mockitousage.customization.BDDMockito.BDDMyOngoingStubbing#willReturn(java.lang.Object)106 */107 public BDDMyOngoingStubbing<T> willReturn(T value) {108 return new BDDOngoingStubbingImpl<T>(mockitoOngoingStubbing.thenReturn(value));109 }110111 /* (non-Javadoc)112 * @see org.mockitousage.customization.BDDMockito.BDDMyOngoingStubbing#willReturn(java.lang.Object, T[])113 */114 public BDDMyOngoingStubbing<T> willReturn(T value, T... values) {115 return new BDDOngoingStubbingImpl<T>(mockitoOngoingStubbing.thenReturn(value, values));116 }117118 /* (non-Javadoc)119 * @see org.mockitousage.customization.BDDMockito.BDDMyOngoingStubbing#willThrow(java.lang.Throwable[])120 */121 public BDDMyOngoingStubbing<T> willThrow(Throwable... throwables) {122 return new BDDOngoingStubbingImpl<T>(mockitoOngoingStubbing.thenThrow(throwables));123 }124125 public BDDMyOngoingStubbing<T> willCallRealMethod() {126 return new BDDOngoingStubbingImpl<T>(mockitoOngoingStubbing.thenCallRealMethod());127 }128 }129 130 /**131 * see original {@link Mockito#when(Object)}132 */133 public static <T> BDDMyOngoingStubbing<T> given(T methodCall) {134 return new BDDOngoingStubbingImpl<T>(Mockito.when(methodCall));135 }136 137 /**138 * See original {@link Stubber}139 */140 public static interface BDDStubber {141 /**142 * See original {@link Stubber#doAnswer(Answer)}143 */144 BDDStubber willAnswer(Answer answer);145 146 /**147 * See original {@link Stubber#doNothing()}148 */149 BDDStubber willNothing();150 151 /**152 * See original {@link Stubber#doReturn(Object)}153 */154 BDDStubber willReturn(Object toBeReturned);155 156 /**157 * See original {@link Stubber#doThrow(Throwable)}158 */159 BDDStubber willThrow(Throwable toBeThrown);160 161 /**162 * See original {@link Stubber#when(Object)}163 */164 <T> T given(T mock);165 }166 167 public static class BDDStubberImpl implements BDDStubber {168169 private final Stubber mockitoStubber;170171 public BDDStubberImpl(Stubber mockitoStubber) {172 this.mockitoStubber = mockitoStubber;173 }174175 /* (non-Javadoc)176 * @see org.mockitousage.customization.BDDMockito.BDDStubber#given(java.lang.Object)177 */178 public <T> T given(T mock) {179 return mockitoStubber.when(mock);180 }181182 /* (non-Javadoc)183 * @see org.mockitousage.customization.BDDMockito.BDDStubber#willAnswer(org.mockito.stubbing.Answer)184 */185 public BDDStubber willAnswer(Answer answer) {186 return new BDDStubberImpl(mockitoStubber.doAnswer(answer));187 }188189 /* (non-Javadoc)190 * @see org.mockitousage.customization.BDDMockito.BDDStubber#willNothing()191 */192 public BDDStubber willNothing() {193 return new BDDStubberImpl(mockitoStubber.doNothing());194 }195196 /* (non-Javadoc)197 * @see org.mockitousage.customization.BDDMockito.BDDStubber#willReturn(java.lang.Object)198 */199 public BDDStubber willReturn(Object toBeReturned) {200 return new BDDStubberImpl(mockitoStubber.doReturn(toBeReturned));201 }202203 /* (non-Javadoc)204 * @see org.mockitousage.customization.BDDMockito.BDDStubber#willThrow(java.lang.Throwable)205 */206 public BDDStubber willThrow(Throwable toBeThrown) {207 return new BDDStubberImpl(mockitoStubber.doThrow(toBeThrown));208 }209 }210 211 /**212 * see original {@link Mockito#doThrow(Throwable)}213 */214 public static BDDStubber willThrow(Throwable toBeThrown) {215 return new BDDStubberImpl(Mockito.doThrow(toBeThrown));216 }217 218 /**219 * see original {@link Mockito#doAnswer(Answer)}220 */221 public static BDDStubber willAnswer(Answer answer) {222 return new BDDStubberImpl(Mockito.doAnswer(answer));223 } 224 225 /**226 * see original {@link Mockito#doNothing()}227 */228 public static BDDStubber willDoNothing() {229 return new BDDStubberImpl(Mockito.doNothing());230 } 231 232 /**233 * see original {@link Mockito#doReturn(Object)}234 */235 public static BDDStubber willReturn(Object toBeReturned) {236 return new BDDStubberImpl(Mockito.doReturn(toBeReturned));237 }238239 /**240 * see original {@link Mockito#doCallRealMethod()}241 */242 public static BDDStubber willCallRealMethod() {243 return new BDDStubberImpl(Mockito.doCallRealMethod());244 } ...

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Source:DefaultLenientStubber.java Github

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...5package org.mockito.internal.stubbing;6import org.mockito.internal.MockitoCore;7import org.mockito.quality.Strictness;8import org.mockito.stubbing.Answer;9import org.mockito.stubbing.LenientStubber;10import org.mockito.stubbing.OngoingStubbing;11import org.mockito.stubbing.Stubber;12public class DefaultLenientStubber implements LenientStubber {13 private static final MockitoCore MOCKITO_CORE = new MockitoCore();14 @Override15 public Stubber doThrow(Throwable... toBeThrown) {16 return stubber().doThrow(toBeThrown);17 }18 @Override19 public Stubber doThrow(Class<? extends Throwable> toBeThrown) {20 return stubber().doThrow(toBeThrown);21 }22 @Override23 public Stubber doThrow(24 Class<? extends Throwable> toBeThrown, Class<? extends Throwable>... nextToBeThrown) {25 return stubber().doThrow(toBeThrown, nextToBeThrown);26 }27 @Override28 public Stubber doAnswer(Answer answer) {29 return stubber().doAnswer(answer);30 }31 @Override32 public Stubber doNothing() {33 return stubber().doNothing();34 }35 @Override36 public Stubber doReturn(Object toBeReturned) {37 return stubber().doReturn(toBeReturned);38 }39 @Override40 public Stubber doReturn(Object toBeReturned, Object... nextToBeReturned) {41 return stubber().doReturn(toBeReturned, nextToBeReturned);42 }43 @Override44 public Stubber doCallRealMethod() {45 return stubber().doCallRealMethod();46 }47 @Override48 public <T> OngoingStubbing<T> when(T methodCall) {49 OngoingStubbingImpl<T> ongoingStubbing =50 (OngoingStubbingImpl) MOCKITO_CORE.when(methodCall);51 ongoingStubbing.setStrictness(Strictness.LENIENT);52 return ongoingStubbing;53 }54 private static Stubber stubber() {55 return MOCKITO_CORE.stubber(Strictness.LENIENT);56 }57}...

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Stubber

Using AI Code Generation

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1import org.mockito.stubbing.Stubber;2import org.mockito.invocation.InvocationOnMock;3import org.mockito.stubbing.Answer;4import org.mockito.stubbing.OngoingStubbing;5import org.mockito.InOrder;6import org.mockito.stubbing.Stubber;7import org.mockito.stubbing.Answer;8import org.mockito.stubbing.Answer;9import

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Stubber

Using AI Code Generation

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1import org.mockito.stubbing.Stubber;2import org.mockito.stubbing.Answer;3import org.mockito.invocation.InvocationOnMock;4import org.mockito.stubbing.OngoingStubbing;5import org.mockito.stubbing.Stubber;6{7 public static void main(String[] args)8 {9 List<String> mockList = mock(List.class);10 Stubber stubber = doReturn("Hello").when(mockList);11 stubber.get(0);12 System.out.println(mockList.get(0));13 }14}

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Stubber

Using AI Code Generation

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1import org.mockito.stubbing.Stubber;2import org.mockito.stubbing.Answer;3import org.mockito.stubbing.OngoingStubbing;4import org.mockito.stubbing.Stubber;5import org.mockito.stubbing.Stubber;6public class StubberTest {7 public static void main(String[] args) {8 List mockList = mock(List.class);9 Stubber stubber = doReturn("Mockito").when(mockList).get(0);10 stubber.thenReturn("rocks");11 System.out.println(mockList.get(0));12 System.out.println(mockList.get(0));13 }14}

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Stubber

Using AI Code Generation

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1package org.mockito.stubbing;2import org.mockito.Mockito;3public class Stubber {4 private final Mockito mockito;5 private final Object mock;6 public Stubber(Mockito mockito, Object mock) {7 this.mockito = mockito;8 this.mock = mock;9 }10 public <T> OngoingStubbing<T> when(T methodCall) {11 return mockito.when(methodCall);12 }13}14package org.mockito;15import org.mockito.stubbing.Stubber;16public class Mockito {17 public static <T> OngoingStubbing<T> when(T methodCall) {18 return new OngoingStubbing<T>();19 }20}21package org.mockito.stubbing;22public class OngoingStubbing<T> {23 public OngoingStubbing<T> thenReturn(T value) {24 return this;25 }26}27package org.mockito.stubbing;28import org.junit.Test;29public class MockitoTest {30 public void test() {31 Object mock = new Object();32 Mockito mockito = new Mockito();33 Stubber stubber = new Stubber(mockito, mock);34 OngoingStubbing<Object> ongoingStubbing = stubber.when(mock);35 ongoingStubbing.thenReturn(new Object());36 }37}

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Stubber

Using AI Code Generation

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1package org.mockito.stubbing;2import org.mockito.Mockito;3import org.mockito.stubbing.Stubber;4import java.util.List;5public class StubberClass {6 public static void main(String[] args) {7 List mockedList = Mockito.mock(List.class);8 Stubber stubber = Mockito.doThrow(new RuntimeException()).doNothing().doReturn("foo");9 stubber.when(mockedList).get(0);10 System.out.println(mockedList.get(0));11 System.out.println(mockedList.get(0));12 }13}14Related posts: Mockito – doReturn() method with Stubber class Mockito – doAnswer() method with Stubber class Mockito – doThrow() method with Stubber class Mockito – doNothing() method with Stubber class Mockito – doCallRealMethod() method with Stubber class Mockito – doNothing() method Mockito – doThrow() method Mockito – doCallRealMethod() method Mockito – doAnswer() method Mockito – doReturn() method Mockito – Stubbing void methods with Exceptions Mockito – Stubbing void methods with Answers Mockito – Stubbing void methods with doThrow() Mockito – Stubbing void methods with doAnswer() Mockito – Stubbing void methods with doNothing() Mockito – Stubbing void methods with doCallRealMethod() Mockito – Stubbing void methods with

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Stubber

Using AI Code Generation

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1import static org.mockito.Mockito.*;2import org.mockito.stubbing.*;3import org.mockito.invocation.*;4import org.mockito.stubbing.Stubber;5import org.mockito.stubbing.Answer;6import org.mockito.stubbing.Stubber;7public class 1 {8 public static void main(String[] args) {9 List<String> mockedList = mock(List.class);10 Stubber stubber = doReturn("Hello").doReturn("World").when(mockedList);11 stubber.get(0);12 stubber.get(1);13 verify(mockedList, times(2)).get(anyInt());14 }15}16import static org.mockito.Mockito.*;17import org.mockito.stubbing.*;18import org.mockito.invocation.*;19import org.mockito.stubbing.Stubber;20import org.mockito.stubbing.Answer;21import org.mockito.stubbing.Stubber;22public class 2 {23 public static void main(String[] args) {24 List<String> mockedList = mock(List.class);25 Stubber stubber = doReturn("Hello").doReturn("World").when(mockedList);26 stubber.get(0);27 stubber.get(1);28 verify(mockedList, times(2)).get(anyInt());29 }30}31import static org.mockito.Mockito.*;32import org.mockito.stubbing.*;33import org.mockito.invocation.*;34import org.mockito.stubbing.Stubber;35import org.mockito.stubbing.Answer;36import org.mockito.stubbing.Stubber;37public class 3 {38 public static void main(String[] args) {39 List<String> mockedList = mock(List.class);40 Stubber stubber = doReturn("Hello").doReturn("World").when(mockedList);41 stubber.get(0);42 stubber.get(1);43 verify(mockedList, times(2)).get(anyInt());44 }45}

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Stubber

Using AI Code Generation

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1import org.mockito.stubbing.Stubber;2import org.mockito.Mockito;3import static org.mockito.Mockito.*;4import static org.junit.Assert.*;5import java.util.*;6import org.junit.Test;7public class StubberDemo {8 public void testStubber() {9 List mockedList = mock(List.class);10 Stubber stubber = doReturn("one").doReturn("two").when(mockedList);11 assertEquals("one", mockedList.get(0));12 assertEquals("two", mockedList.get(0));13 }14}

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Stubber

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1import org.mockito.stubbing.Stubber;2import static org.mockito.Mockito.*;3import org.mockito.Mock;4import org.mockito.MockitoAnnotations;5import org.junit.Test;6import org.junit.Before;7import static org.junit.Assert.assertEquals;8public class StubberExample {9 Calculator calc;10 public void setUp(){11 MockitoAnnotations.initMocks(this);12 }13 public void testStubber(){14 Stubber stubber = doReturn(5);15 stubber.when(calc).add(10,20);16 assertEquals(5,calc.add(10,20));17 assertEquals(0,calc.add(0,0));18 }19}

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1import static org.mockito.Mockito.*;2import org.mockito.stubbing.*;3import java.util.*;4class TestClass{5 public static void main(String args[]){6 List list = mock(List.class);7 Stubber stubber = doReturn("Hello").when(list);8 stubber.withArguments("World");9 System.out.println(list.get(0));10 System.out.println(list.get("World"));11 }12}

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