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How to use instantiate method of org.mockito.internal.util.reflection.FieldInitializer class

Best Mockito code snippet using org.mockito.internal.util.reflection.FieldInitializer.instantiate

Source:FieldInitializerTest.java

...22    private StaticClassThrowingExceptionDefaultConstructor throwingExDefaultConstructor;23    private AbstractStaticClass abstractType;24    private Interface interfaceType;25    private InnerClassType innerClassType;26    private AbstractStaticClass instantiatedAbstractType = new ConcreteStaticClass();27    private Interface instantiatedInterfaceType =  new ConcreteStaticClass();28    private InnerClassType instantiatedInnerClassType = new InnerClassType();29    @Test30    public void should_keep_same_instance_if_field_initialized() throws Exception {31        final StaticClass backupInstance = alreadyInstantiated;32        FieldInitializer fieldInitializer = new FieldInitializer(this, field("alreadyInstantiated"));33        FieldInitializationReport report = fieldInitializer.initialize();34        assertSame(backupInstance, report.fieldInstance());35        assertFalse(report.fieldWasInitialized());36        assertFalse(report.fieldWasInitializedUsingContructorArgs());37    }38    @Test39    public void should_instantiate_field_when_type_has_no_constructor() throws Exception {40        FieldInitializer fieldInitializer = new FieldInitializer(this, field("noConstructor"));41        FieldInitializationReport report = fieldInitializer.initialize();42        assertNotNull(report.fieldInstance());43        assertTrue(report.fieldWasInitialized());44        assertFalse(report.fieldWasInitializedUsingContructorArgs());45    }46    @Test47    public void should_instantiate_field_with_default_constructor() throws Exception {48        FieldInitializer fieldInitializer = new FieldInitializer(this, field("defaultConstructor"));49        FieldInitializationReport report = fieldInitializer.initialize();50        assertNotNull(report.fieldInstance());51        assertTrue(report.fieldWasInitialized());52        assertFalse(report.fieldWasInitializedUsingContructorArgs());53    }54    @Test55    public void should_instantiate_field_with_private_default_constructor() throws Exception {56        FieldInitializer fieldInitializer = new FieldInitializer(this, field("privateDefaultConstructor"));57        FieldInitializationReport report = fieldInitializer.initialize();58        assertNotNull(report.fieldInstance());59        assertTrue(report.fieldWasInitialized());60        assertFalse(report.fieldWasInitializedUsingContructorArgs());61    }62    @Test(expected = MockitoException.class)63    public void should_fail_to_instantiate_field_if_no_default_constructor() throws Exception {64        FieldInitializer fieldInitializer = new FieldInitializer(this, field("noDefaultConstructor"));65        fieldInitializer.initialize();66    }67    @Test68    public void should_fail_to_instantiate_field_if_default_constructor_throws_exception() throws Exception {69        FieldInitializer fieldInitializer = new FieldInitializer(this, field("throwingExDefaultConstructor"));70        try {71            fieldInitializer.initialize();72            fail();73        } catch (MockitoException e) {74            InvocationTargetException ite = (InvocationTargetException) e.getCause();75            assertTrue(ite.getTargetException() instanceof NullPointerException);76            assertEquals("business logic failed", ite.getTargetException().getMessage());77        }78    }79    @Test(expected = MockitoException.class)80    public void should_fail_for_abstract_field() throws Exception {81        new FieldInitializer(this, field("abstractType"));82    }83    @Test84    public void should_not_fail_if_abstract_field_is_instantiated() throws Exception {85        new FieldInitializer(this, field("instantiatedAbstractType"));86    }87    @Test(expected = MockitoException.class)88    public void should_fail_for_interface_field() throws Exception {89        new FieldInitializer(this, field("interfaceType"));90    }91    @Test92    public void should_not_fail_if_interface_field_is_instantiated() throws Exception {93        new FieldInitializer(this, field("instantiatedInterfaceType"));94    }95    @Test(expected = MockitoException.class)96    public void should_fail_for_local_type_field() throws Exception {97        // when98        class LocalType { }99        class TheTestWithLocalType {100            @InjectMocks LocalType field;101        }102        TheTestWithLocalType testWithLocalType = new TheTestWithLocalType();103        // when104        new FieldInitializer(testWithLocalType, testWithLocalType.getClass().getDeclaredField("field"));105    }106    @Test107    public void should_not_fail_if_local_type_field_is_instantiated() throws Exception {108        // when109        class LocalType { }110        class TheTestWithLocalType {111            @InjectMocks LocalType field = new LocalType();112        }113        TheTestWithLocalType testWithLocalType = new TheTestWithLocalType();114        // when115        new FieldInitializer(testWithLocalType, testWithLocalType.getClass().getDeclaredField("field"));116    }117    @Test(expected = MockitoException.class)118    public void should_fail_for_inner_class_field() throws Exception {119        new FieldInitializer(this, field("innerClassType"));120    }121    @Test122    public void should_not_fail_if_inner_class_field_is_instantiated() throws Exception {123        new FieldInitializer(this, field("instantiatedInnerClassType"));124    }125    @Test126    public void can_instantiate_class_with_parameterized_constructor() throws Exception {127        ConstructorArgumentResolver resolver = given(mock(ConstructorArgumentResolver.class).resolveTypeInstances(any(Class.class)))128                        .willReturn(new Object[]{null}).getMock();129        new FieldInitializer(this, field("noDefaultConstructor"), resolver).initialize();130        assertNotNull(noDefaultConstructor);131    }132    private Field field(String fieldName) throws NoSuchFieldException {133        return this.getClass().getDeclaredField(fieldName);134    }135    static class StaticClass {136    }137    static class StaticClassWithDefaultConstructor {138        StaticClassWithDefaultConstructor() { }139    }140    static class StaticClassWithPrivateDefaultConstructor {...

instantiate

Using AI Code Generation

1import static org.mockito.Mockito.*;2import static org.mockito.internal.util.reflection.FieldInitializer.*;3import static org.junit.Assert.*;4import org.junit.Test;5import org.mockito.internal.util.reflection.FieldInitializer;6import java.lang.reflect.Field;7public class FieldInitializerTest {8  public void testInstantiate() throws Exception {9    Field field = FieldInitializerTest.class.getDeclaredField("field");10    field.setAccessible(true);11    FieldInitializer fieldInitializer = new FieldInitializer(field, FieldInitializerTest.class);12    fieldInitializer.instantiate();13    assertEquals(1, field.get(this));14  }15  private int field;16}

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