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

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

Source:BDDMockito.java

...3 * This program is made available under the terms of the MIT License.4 */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));
...

Source:InvocationContainerImpl.java

...17import org.mockito.invocation.InvocationContainer;18import org.mockito.invocation.MatchableInvocation;19import org.mockito.mock.MockCreationSettings;20import org.mockito.quality.Strictness;21import org.mockito.stubbing.Answer;22import org.mockito.stubbing.Stubbing;23import org.mockito.stubbing.ValidableAnswer;24@SuppressWarnings("unchecked")25public class InvocationContainerImpl implements InvocationContainer, Serializable {26    private static final long serialVersionUID = -5334301962749537177L;27    private final LinkedList<StubbedInvocationMatcher> stubbed = new LinkedList<>();28    private final DoAnswerStyleStubbing doAnswerStyleStubbing;29    private final RegisteredInvocations registeredInvocations;30    private final Strictness mockStrictness;31    private MatchableInvocation invocationForStubbing;32    public InvocationContainerImpl(MockCreationSettings mockSettings) {33        this.registeredInvocations = createRegisteredInvocations(mockSettings);34        this.mockStrictness = mockSettings.isLenient() ? Strictness.LENIENT : null;35        this.doAnswerStyleStubbing = new DoAnswerStyleStubbing();36    }37    public void setInvocationForPotentialStubbing(MatchableInvocation invocation) {38        registeredInvocations.add(invocation.getInvocation());39        this.invocationForStubbing = invocation;40    }41    public void resetInvocationForPotentialStubbing(MatchableInvocation invocationMatcher) {42        this.invocationForStubbing = invocationMatcher;43    }44    public void addAnswer(Answer answer, Strictness stubbingStrictness) {45        registeredInvocations.removeLast();46        addAnswer(answer, false, stubbingStrictness);47    }48    /** Adds new stubbed answer and returns the invocation matcher the answer was added to. */49    public StubbedInvocationMatcher addAnswer(50            Answer answer, boolean isConsecutive, Strictness stubbingStrictness) {51        Invocation invocation = invocationForStubbing.getInvocation();52        mockingProgress().stubbingCompleted();53        if (answer instanceof ValidableAnswer) {54            ((ValidableAnswer) answer).validateFor(invocation);55        }56        synchronized (stubbed) {57            if (isConsecutive) {58                stubbed.getFirst().addAnswer(answer);59            } else {60                Strictness effectiveStrictness =61                        stubbingStrictness != null ? stubbingStrictness : this.mockStrictness;62                stubbed.addFirst(63                        new StubbedInvocationMatcher(64                                answer, invocationForStubbing, effectiveStrictness));65            }66            return stubbed.getFirst();67        }68    }69    public void addConsecutiveAnswer(Answer answer) {70        addAnswer(answer, true, null);71    }72    Object answerTo(Invocation invocation) throws Throwable {73        return findAnswerFor(invocation).answer(invocation);74    }75    public StubbedInvocationMatcher findAnswerFor(Invocation invocation) {76        synchronized (stubbed) {77            for (StubbedInvocationMatcher s : stubbed) {78                if (s.matches(invocation)) {79                    s.markStubUsed(invocation);80                    // TODO we should mark stubbed at the point of stubbing, not at the point where81                    // the stub is being used82                    invocation.markStubbed(new StubInfoImpl(s));83                    return s;84                }85            }86        }87        return null;88    }89    /**90     * Sets the answers declared with 'doAnswer' style.91     */92    public void setAnswersForStubbing(List<Answer<?>> answers, Strictness strictness) {93        doAnswerStyleStubbing.setAnswers(answers, strictness);94    }95    public boolean hasAnswersForStubbing() {96        return !doAnswerStyleStubbing.isSet();97    }98    public boolean hasInvocationForPotentialStubbing() {99        return !registeredInvocations.isEmpty();100    }101    public void setMethodForStubbing(MatchableInvocation invocation) {102        invocationForStubbing = invocation;103        assert hasAnswersForStubbing();104        for (int i = 0; i < doAnswerStyleStubbing.getAnswers().size(); i++) {105            addAnswer(106                    doAnswerStyleStubbing.getAnswers().get(i),107                    i != 0,108                    doAnswerStyleStubbing.getStubbingStrictness());109        }110        doAnswerStyleStubbing.clear();111    }112    @Override113    public String toString() {114        return "invocationForStubbing: " + invocationForStubbing;115    }116    public List<Invocation> getInvocations() {117        return registeredInvocations.getAll();118    }119    public void clearInvocations() {120        registeredInvocations.clear();121    }122    /**123     * Stubbings in descending order, most recent first124     */125    public List<Stubbing> getStubbingsDescending() {126        return (List) stubbed;127    }128    /**129     * Stubbings in ascending order, most recent last130     */131    public Collection<Stubbing> getStubbingsAscending() {132        List<Stubbing> result = new LinkedList<>(stubbed);133        Collections.reverse(result);134        return result;135    }136    public Object invokedMock() {137        return invocationForStubbing.getInvocation().getMock();138    }139    private RegisteredInvocations createRegisteredInvocations(MockCreationSettings mockSettings) {140        return mockSettings.isStubOnly()141                ? new SingleRegisteredInvocation()142                : new DefaultRegisteredInvocations();143    }144    public Answer findStubbedAnswer() {145        synchronized (stubbed) {146            for (StubbedInvocationMatcher s : stubbed) {147                if (invocationForStubbing.matches(s.getInvocation())) {148                    return s;149                }150            }151        }152        return null;153    }154}...

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import org.mockito.Mockito;3import static org.mockito.Mockito.when;4import static org.mockito.Mockito.doAnswer;5import static org.mockito.Matchers.anyString;6import static org.mockito.Mockito.verify;7import static org.mockito.Mockito.times;8import static org.mockito.Mockito.verifyNoMoreInteractions;9import static org.mockito.Mockito.verifyZeroInteractions;10import static org.mockito.Mockito.doThrow;11import static org.mockito.Mockito.doNothing;12import static org.mockito.Mockito.doReturn;13import static org.mockito.Mockito.doThrow;14import static org.mockito.Mockito.doCallRealMethod;15import static org.mockito.Matchers.anyInt;16import static org.mockito.Matchers.any;17import static org.mockito.Matchers.anyLong;18import static org.mockito.Matchers.anyDouble;19import static org.mockito.Matchers.anyFloat;20import static org.mockito.Matchers.anyChar;21import static org.mockito.Matchers.anyByte;22import static org.mockito.Matchers.anyShort;23import static org.mockito.Matchers.anyBoolean;24import static org.mockito.Matchers.anyObject;

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import org.mockito.Mockito;3import static org.mockito.Mockito.mock;4import static org.mockito.Mockito.when;5import static org.mockito.stubbing.OngoingStubbing.thenAnswer;6import static org.mockito.Matchers.anyString;7import static org.mockito.Matchers.anyInt;8import static org.mockito.Matchers.any;9import static org.mockito.Mockito.verify;10import static org.mockito.Mockito.times;11import static org.mockito.Mockito.doReturn;12import static org.mockito.Mockito.doThrow;13import static org.mockito.Mockito.doNothing;14import static org.mockito.Mockito.doAnswer;15import static org.mockito.Mockito.doCallRealMethod;16import static org.mockito.Mockito.verifyNoMoreInteractions;17import static org.mockito.Mockito.verifyZeroInteractions;18import static org.mockito.Mockito.verifyNoMoreInteractions;19import static org.mockito.Mockito.verifyZeroInteractions;20import static org.mockito.Mockito.inOrder;21import static org.mockito.Mockito.never;22import static org.mockito.Mockito.atLeastOnce;23import static org.mockito.Mockito.atLeast;

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import static org.mockito.Mockito.mock;3import static org.mockito.Mockito.when;4import static org.mockito.Mockito.doAnswer;5import static org.mockito.Mockito.doNothing;6import static org.mockito.Mockito.doThrow;7import static org.mockito.Mockito.doReturn;8import static org.mockito.Mockito.doCallRealMethod;9public class 1 {10    public static void main(String []args) {11        Answer answer = mock(Answer.class);12        when(answer.answer(null)).thenReturn(null);13        doAnswer(answer).when(null).answer(null);14        doNothing().when(null).answer(null);15        doThrow(new RuntimeException()).when(null).answer(null);16        doReturn(null).when(null).answer(null);17        doCallRealMethod().when(null).answer(null);18    }19}

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import org.mockito.Mockito;3import org.mockito.MockitoAnnotations;4import org.mockito.MockingDetails;5import org.mockito.MockHandler;6import org.mockito.MockCreationSettings;7import org.mockito.MockSettings;8import org.mockito.MockName;9import org.mockito.MockingProgress;10import org.mockito.MockFactory;11import org.mockito.VerificationData;12import org.mockito.VerificationMode;13import org.mockito.VerificationStrategy;14import org.mockito.VerificationAfterDelay;15import org.mockito.VerificationWithTimeout;16import org.mockito.VerificationInOrder;17import org.mockito.VerificationInOrderMode;18import org.mockito.VerificationModeFactory;19import org.mockito.VerificationModeImpl;20import org.mockito.VerificationModeBuilder;21import org.mockito.VerificationModeBuilderImpl;22import org.mockito.VerificationInOrderModeImpl;23import org.mockito.VerificationInOrderModeBuilder;24import org.mockito.VerificationInOrderModeBuilderImpl;25import org.mockito.Verification

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import org.mockito.invocation.InvocationOnMock;3import static org.mockito.Mockito.*;4import static org.junit.Assert.*;5import org.junit.Test;6public class Test1 {7    public void test() {8        List<String> mockList = mock(List.class);9        when(mockList.get(0)).thenReturn("first");10        assertEquals("first", mockList.get(0));11        assertEquals(null, mockList.get(999));12    }13}

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import org.mockito.stubbing.Stubber;3import static org.mockito.Mockito.when;4import static org.mockito.Matchers.anyString;5import static org.mockito.Mockito.verify;6import static org.mockito.internal.verification.Times.times;7import static org.mockito.Mockito.doThrow;8import static org.mockito.Mockito.doAnswer;9import static org.mockito.Mockito.doReturn;10import static org.mockito.Mockito.doNothing;11import static org.mockito.Mockito.doCallRealMethod;12import static org.mockito.Matchers.eq;13import static org.mockito.Matchers.anyInt;14import static org.mockito.Matchers.any;15import static org.mockito.Matchers.anyObject;16import static org.mockito.Matchers.anyVararg;17import static org.mockito.Matchers.anyBoolean;18import static org.mockito.Matchers.anyByte;19import static org.mockito.Matchers.anyChar;20import static org.mockito.Matchers.anyDouble;21import static org.mockito.Matchers.anyFloat;22import static org.mockito.Matchers.anyLong;23import static org.mockito.Matchers.anyShort;24import static org.mockito.Matchers.argThat;25import static org

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2import static org.mockito.Mockito.*;3import static org.mockito.Mockito.when;4import static org.mockito.Mockito.mock;5import static org.mockito.Mockito.doAnswer;6import static org.mockito.Mockito.times;7import static org.mockito.Mockito.verify;8import static org.mockito.Mockito.any;9import static org.mockito.Mockito.anyString;10import static org.mockito.Mockito.anyInt;11import static org.mockito.Mockito.anyBoolean;12import static org.mockito.Mockito.anyFloat;13import static org.mockito.Mockito.anyDouble;14import static org.mockito.Mockito.anyLong;15import static org.mockito.Mockito.anyShort;16import static org.mockito.Mockito.anyByte;17import static org.mockito.Mockito.anyChar;18import static org.mockito.Mockito.anyList;19import static org.mockito.Mockito.anyMap;20import static org.mockito.Mockito.anySet;21import static org.mockito.Mockito.anyCollection;22import static org.mockito.Mockito.anyObject;23import static org.mockito.Mockito.anyVararg;24import java.util.*;25import java.util.concurrent.*;26import java.util.function.*;27import java.util.stream.*;28import java.util

Answer

Using AI Code Generation

1import org.mockito.stubbing.Answer;2public class AnswerDemo {3    public static void main(String[] args) {4        List list = mock(List.class);5        when(list.get(0)).thenAnswer(new Answer<String>() {6            public String answer(InvocationOnMock invocation) throws Throwable {7                return "first";8            }9        });10        when(list.get(1)).thenAnswer(new Answer<String>() {11            public String answer(InvocationOnMock invocation) throws Throwable {12                return "second";13            }14        });15        System.out.println(list.get(0));16        System.out.println(list.get(1));17    }18}

Answer

Using AI Code Generation

1package org.mockito.stubbing;2public class Answer{3  public void doSomething(){4    System.out.println("Answer class from org.mockito.stubbing package");5  }6}7package org.mockito;8public class Answer{9  public void doSomething(){10    System.out.println("Answer class from org.mockito package");11  }12}13package org.mockito.stubbing;14public class Answer{15  public void doSomething(){16    System.out.println("Answer class from org.mockito.stubbing package");17  }18}19package org.mockito;20public class Answer{21  public void doSomething(){22    System.out.println("Answer class from org.mockito package");23  }24}25package org.mockito.stubbing;26public class Answer{27  public void doSomething(){28    System.out.println("Answer class from org.mockito.stubbing package");29  }30}31package org.mockito;32public class Answer{33  public void doSomething(){34    System.out.println("Answer class from org.mockito package");35  }36}37package org.mockito.stubbing;38public class Answer{39  public void doSomething(){40    System.out.println("Answer class from org.mockito.stubbing package");41  }42}43package org.mockito;44public class Answer{45  public void doSomething(){46    System.out.println("Answer class from org.mockito package");47  }48}49package org.mockito.stubbing;50public class Answer{51  public void doSomething(){52    System.out.println("Answer class from org.mockito.stubbing package");53  }54}55package org.mockito;56public class Answer{57  public void doSomething(){58    System.out.println("Answer class from org.mockito package");59  }60}61package org.mockito.stubbing;62public class Answer{63  public void doSomething(){64    System.out.println("Answer class from org.mockito.stubbing package");65  }66}67package org.mockito;68public class Answer{69  public void doSomething(){70    System.out.println("Answer class from org.mockito

Answer

Using AI Code Generation

1package org.mockito.stubbing;2import org.mockito.Mockito;3import org.mockito.stubbing.Answer;4public class Answer1 {5    public static void main(String[] args) {6        DummyClass mock = Mockito.mock(DummyClass.class);7        Mockito.when(mock.getUniqueId()).thenAnswer(new Answer<Integer>() {8            public Integer answer(InvocationOnMock invocation) {9                Object[] args = invocation.getArguments();10                Object mock = invocation.getMock();11                return 45;12            }13        });14        System.out.println("mock.getUniqueId(): " + mock.getUniqueId());15    }16}17package org.mockito.invocation;18import org.mockito.Mockito;19import org.mockito.invocation.Answer;20public class Answer2 {21    public static void main(String[] args) {22        DummyClass mock = Mockito.mock(DummyClass.class);23        Mockito.when(mock.getUniqueId()).thenAnswer(new Answer<Integer>() {24            public Integer answer(InvocationOnMock invocation) {25                Object[] args = invocation.getArguments();26                Object mock = invocation.getMock();27                return 45;28            }29        });30        System.out.println("mock.getUniqueId(): " + mock.getUniqueId());31    }32}33package org.mockito.stubbing;34import org.mockito.Mockito;35import org.mockito.stubbing.Answer;36public class Answer3 {37    public static void main(String[] args) {38        DummyClass mock = Mockito.mock(DummyClass.class);39        Mockito.when(mock.getUniqueId()).thenAnswer(new Answer<Integer>() {40            public Integer answer(InvocationOnMock invocation) {41                Object[] args = invocation.getArguments();42                Object mock = invocation.getMock();43                return 45;44            }45        });46        System.out.println("mock.getUniqueId(): " + mock.getUniqueId());47    }48}49package org.mockito.invocation;50import org.mockito.Mockito;51import org.mockito.invocation.Answer;52public class Answer4 {

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