How to use init method of org.mockito.Spy class

Best Mockito code snippet using org.mockito.Spy.init

Source:SpyAnnotationTest.java

...39    MockTranslator translator;40    @Rule41    public final ExpectedException shouldThrow = ExpectedException.none();42    @Test43    public void should_init_spy_by_instance() throws Exception {44        doReturn("foo").when(spiedList).get(10);45        assertEquals("foo", spiedList.get(10));46        assertTrue(spiedList.isEmpty());47    }48    @Test49    public void should_init_spy_and_automatically_create_instance() throws Exception {50        when(staticTypeWithNoArgConstructor.toString()).thenReturn("x");51        when(staticTypeWithoutDefinedConstructor.toString()).thenReturn("y");52        assertEquals("x", staticTypeWithNoArgConstructor.toString());53        assertEquals("y", staticTypeWithoutDefinedConstructor.toString());54    }55    @Test56    public void should_allow_spying_on_interfaces() throws Exception {57        class WithSpy {58            @Spy59            List<String> list;60        }61        WithSpy withSpy = new WithSpy();62        MockitoAnnotations.initMocks(withSpy);63        when(withSpy.list.size()).thenReturn(3);64        assertEquals(3, withSpy.list.size());65    }66    @Test67    public void should_allow_spying_on_interfaces_when_instance_is_concrete() throws Exception {68        class WithSpy {69            @Spy70            List<String> list = new LinkedList<String>();71        }72        WithSpy withSpy = new WithSpy();73        //when74        MockitoAnnotations.initMocks(withSpy);75        //then76        verify(withSpy.list, never()).clear();77    }78    @Test79    public void should_report_when_no_arg_less_constructor() throws Exception {80        class FailingSpy {81            @Spy82            NoValidConstructor noValidConstructor;83        }84        try {85            MockitoAnnotations.initMocks(new FailingSpy());86            fail();87        } catch (MockitoException e) {88            assertThat(e.getMessage()).contains("Please ensure that the type")89                    .contains(NoValidConstructor.class.getSimpleName())90                    .contains("has a no-arg constructor");91        }92    }93    @Test94    public void should_report_when_constructor_is_explosive() throws Exception {95        class FailingSpy {96            @Spy97            ThrowingConstructor throwingConstructor;98        }99        try {100            MockitoAnnotations.initMocks(new FailingSpy());101            fail();102        } catch (MockitoException e) {103            assertThat(e.getMessage()).contains("Unable to create mock instance");104        }105    }106    @Test107    public void should_spy_abstract_class() throws Exception {108        class SpyAbstractClass {109            @Spy110            AbstractList<String> list;111            List<String> asSingletonList(String s) {112                when(list.size()).thenReturn(1);113                when(list.get(0)).thenReturn(s);114                return list;115            }116        }117        SpyAbstractClass withSpy = new SpyAbstractClass();118        MockitoAnnotations.initMocks(withSpy);119        assertEquals(Arrays.asList("a"), withSpy.asSingletonList("a"));120    }121    @Test122    public void should_spy_inner_class() throws Exception {123        class WithMockAndSpy {124            @Spy125            private InnerStrength strength;126            @Mock127            private List<String> list;128            abstract class InnerStrength {129                private final String name;130                InnerStrength() {131                    // Make sure that @Mock fields are always injected before @Spy fields.132                    assertNotNull(list);133                    // Make sure constructor is indeed called.134                    this.name = "inner";135                }136                abstract String strength();137                String fullStrength() {138                    return name + " " + strength();139                }140            }141        }142        WithMockAndSpy outer = new WithMockAndSpy();143        MockitoAnnotations.initMocks(outer);144        when(outer.strength.strength()).thenReturn("strength");145        assertEquals("inner strength", outer.strength.fullStrength());146    }147    @Test(expected = IndexOutOfBoundsException.class)148    public void should_reset_spy() throws Exception {149        spiedList.get(10); // see shouldInitSpy150    }151    @Test152    public void should_report_when_enclosing_instance_is_needed() throws Exception {153        class Outer {154            class Inner {155            }156        }157        class WithSpy {158            @Spy159            private Outer.Inner inner;160        }161        try {162            MockitoAnnotations.initMocks(new WithSpy());163            fail();164        } catch (MockitoException e) {165            assertThat(e).hasMessageContaining("@Spy annotation can only initialize inner classes");166        }167    }168    @Test169    public void should_report_private_inner_not_supported() throws Exception {170        try {171            MockitoAnnotations.initMocks(new WithInnerPrivate());172            fail();173        } catch (MockitoException e) {174            // Currently fails at instantiation time, because the mock subclass don't have the175            // 1-arg constructor expected for the outerclass.176            // org.mockito.internal.creation.instance.ConstructorInstantiator.withParams()177            assertThat(e).hasMessageContaining("Unable to initialize @Spy annotated field 'spy_field'")178                    .hasMessageContaining(WithInnerPrivate.InnerPrivate.class.getSimpleName());179        }180    }181    @Test182    public void should_report_private_abstract_inner_not_supported() throws Exception {183        try {184            MockitoAnnotations.initMocks(new WithInnerPrivateAbstract());185            fail();186        } catch (MockitoException e) {187            assertThat(e).hasMessageContaining("@Spy annotation can't initialize private abstract inner classes")188                    .hasMessageContaining(WithInnerPrivateAbstract.class.getSimpleName())189                    .hasMessageContaining(WithInnerPrivateAbstract.InnerPrivateAbstract.class.getSimpleName())190                    .hasMessageContaining("You should augment the visibility of this inner class");191        }192    }193    @Test194    public void should_report_private_static_abstract_inner_not_supported() throws Exception {195        try {196            MockitoAnnotations.initMocks(new WithInnerPrivateStaticAbstract());197            fail();198        } catch (MockitoException e) {199            assertThat(e).hasMessageContaining("@Spy annotation can't initialize private abstract inner classes")200                    .hasMessageContaining(WithInnerPrivateStaticAbstract.class.getSimpleName())201                    .hasMessageContaining(WithInnerPrivateStaticAbstract.InnerPrivateStaticAbstract.class.getSimpleName())202                    .hasMessageContaining("You should augment the visibility of this inner class");203        }204    }205    @Test206    public void should_be_able_to_stub_and_verify_via_varargs_for_list_params() throws Exception {207      // You can stub with varargs.208      when(translator.translate("hello", "mockito")).thenReturn(Arrays.asList("you", "too"));209      // Pretend the prod code will call translate(List<String>) with these elements.210      assertThat(translator.translate(Arrays.asList("hello", "mockito"))).containsExactly("you", "too");211      assertThat(translator.translate(Arrays.asList("not stubbed"))).isEmpty();212      // You can verify with varargs.213      verify(translator).translate("hello", "mockito");...

init

Using AI Code Generation

1[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ mockito-example ---2[INFO] --- maven-compiler-plugin:2.3.2:testCompile (default-testCompile) @ mockito-example ---3[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ mockito-example ---4[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ mockito-example ---5[INFO] --- maven-failsafe-plugin:2.12.4:integration-test (default) @ mockito-example ---6[INFO] --- maven-failsafe-plugin:2.12.4:verify (default) @ mockito-example ---7[INFO] --- maven-install-plugin:2.4:install (default-install) @ mockito-example ---

init

Using AI Code Generation

1import org.mockito.Spy2import org.mockito.Mockito.mock3import org.mockito.Mockito.spy4import org.mockito.Mockito.verify5import org.mockito.Mockito.times6import org.mockito.Mockito.doReturn7import org.mockito.Mockito.doThrow8import org.mockito.Mockito.doNothing9import org.mockito.Mockito.doAnswer10import org.mockito.Mockito.doNothing11import org.mockito.Mockito.doCallRealMethod12import org.mockito.Mockito.doAnswer13import org.mockito.Mockito.doReturn14import org.mockito.Mockito.doThrow15import org.mockito.invocation.InvocationOnMock16import org.mockito.stubbing.Answer17import org.mockito.stubbing.Stubber18import org.mockito.Mockito.*19import org.mockito.Mockito.mock20import org.mockito.Mockito.spy21import org.mockito.Mockito.verify22import org.mockito.Mockito.times23import org.mockito.Mockito.doReturn24import org.mockito.Mockito.doThrow25import org.mockito.Mockito.doNothing26import org.mockito.Mockito.doAnswer27import org.mockito.Mockito.doNothing28import org.mockito.Mockito.doCallRealMethod29import org.mockito.Mockito.doAnswer30import org.mockito.Mockito.doReturn31import org.mockito.Mockito.doThrow32import org.mockito.invocation.InvocationOnMock33import org.mockito.stubbing.Answer34import org.mockito.stubbing.Stubber35import org.mockito.Matchers.*36import org.mockito.Matchers.anyInt37import org.mockito.Matchers.anyString38import org.mockito.Matchers.any39import org.mockito.Matchers.anyVararg40import org.mockito.Matchers.anyCollection41import org.mockito.Matchers.anyCollectionOf42import org.mockito.Matchers.anyIterable43import org.mockito.Matchers.anyList44import org.mockito.Matchers.anyMap45import org.mockito.Matchers.anyMapOf46import org.mockito.Matchers.anySet47import org.mockito.Matchers.anySetOf48import org.mockito.Matchers.anyVararg49import org.mockito.Matchers.argThat50import org.mockito.Matchers.contains51import org.mockito.Matchers.eq52import org.mockito.Matchers.isA53import org.mockito.Matchers.isNull54import org.mockito.Matchers.notNull55import org.mockito.Matchers.refEq56import org.mockito.Matchers.same57import org.mockito.ArgumentMatchers.*58import org.mockito.ArgumentMatchers.anyInt59import org.mockito.ArgumentMatchers.anyString60import org.mockito.ArgumentMatchers.any61import org.mockito.ArgumentMatchers.anyVararg62import org.mockito.ArgumentMatchers.anyCollection63import org.mockito.ArgumentMatchers.anyCollectionOf64import org.mockito.ArgumentMatchers.anyIterable65import org.mockito.ArgumentMatchers.any

init

Using AI Code Generation

1import org.mockito.Spy;2import org.mockito.MockitoAnnotations;3import org.mockito.InjectMocks;4import org.mockito.Mock;5import org.junit.Before;6import org.junit.Test;7import static org.mockito.Mockito.*;8import static org.junit.Assert.*;9public class MockitoSpyTest {10    private List<String> spyList;11    private List<String> list;12    private List<String> mockList;13    public void init() {14        MockitoAnnotations.initMocks(this);15    }16    public void testSpy() {17        spyList.add("one");18        spyList.add("two");19        verify(spyList).add("one");20        verify(spyList).add("two");21        assertEquals(2, spyList.size());22        assertEquals(0, list.size());23        assertEquals(0, mockList.size());24    }25}26You have a Mockito spy() on a final class that is not a mock. 27You have a Mockito spy() on a final class th

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