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

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

Source:BDDMockito.java

...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    }
...

Source:DefaultLenientStubber.java

...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}...

Stubber

Using AI Code Generation

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

Stubber

Using AI Code Generation

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}

Stubber

Using AI Code Generation

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}

Stubber

Using AI Code Generation

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}

Stubber

Using AI Code Generation

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

Stubber

Using AI Code Generation

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}

Stubber

Using AI Code Generation

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}

Stubber

Using AI Code Generation

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}

Stubber

Using AI Code Generation

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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