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

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

Source:FieldInitializerTest.java

...5package org.mockito.internal.util.reflection;6import org.junit.Test;7import org.mockito.InjectMocks;8import org.mockito.exceptions.base.MockitoException;9import org.mockito.internal.util.reflection.FieldInitializer.ConstructorArgumentResolver;10import java.lang.reflect.Field;11import java.lang.reflect.InvocationTargetException;12import static org.junit.Assert.*;13import static org.mockito.BDDMockito.given;14import static org.mockito.Matchers.any;15import static org.mockito.Mockito.mock;16public class FieldInitializerTest {17    private StaticClass alreadyInstantiated = new StaticClass();18    private StaticClass noConstructor;19    private StaticClassWithDefaultConstructor defaultConstructor;20    private StaticClassWithPrivateDefaultConstructor privateDefaultConstructor;21    private StaticClassWithoutDefaultConstructor noDefaultConstructor;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 {141        private StaticClassWithPrivateDefaultConstructor() { }142    }143    static class StaticClassWithoutDefaultConstructor {...

Source:GwtSpyAnnotationEngine.java

...4import org.mockito.exceptions.base.MockitoException;5import org.mockito.internal.configuration.SpyAnnotationEngine;6import org.mockito.internal.util.MockUtil;7import org.mockito.internal.util.reflection.FieldInitializationReport;8import org.mockito.internal.util.reflection.FieldInitializer;9import java.lang.annotation.Annotation;10import java.lang.reflect.Field;11import static org.mockito.Mockito.withSettings;12/**13 * Overrides Mockito's SpyAnnotationEngine to handle {@link com.googlecode.gwt.test.Mock}14 * annotation.15 *16 * @author Gael Lazzari17 */18class GwtSpyAnnotationEngine extends SpyAnnotationEngine {19    @Override20    @SuppressWarnings("deprecation")21    // for MockitoAnnotations.Mock22    public void process(Class<?> context, Object testInstance) {23        Field[] fields = context.getDeclaredFields();24        for (Field field : fields) {25            if (field.isAnnotationPresent(Spy.class) && !field.isAnnotationPresent(InjectMocks.class)) {26                assertNoIncompatibleAnnotations(Spy.class, field, com.googlecode.gwt.test.Mock.class,27                        Mock.class, org.mockito.MockitoAnnotations.Mock.class, Captor.class);28                Object instance = null;29                try {30                    FieldInitializationReport report = new FieldInitializer(testInstance, field).initialize();31                    instance = report.fieldInstance();32                } catch (MockitoException e) {33                    new Reporter().cannotInitializeForSpyAnnotation(field.getName(), e);34                }35                try {36                    if (new MockUtil().isMock(instance)) {37                        // instance has been spied earlier38                        // for example happens when MockitoAnnotations.initMocks is called two times.39                        Mockito.reset(instance);40                    } else {41                        field.setAccessible(true);42                        field.set(testInstance, Mockito.mock(43                                instance.getClass(),44                                withSettings().spiedInstance(instance).defaultAnswer(...

Source:ConstructorInjection.java

...4 */5package org.mockito.internal.configuration.injection;6import org.mockito.exceptions.base.MockitoException;7import org.mockito.internal.util.reflection.FieldInitializationReport;8import org.mockito.internal.util.reflection.FieldInitializer;9import org.mockito.internal.util.reflection.FieldInitializer.ConstructorArgumentResolver;10import static org.mockito.internal.exceptions.Reporter.fieldInitialisationThrewException;11import java.lang.reflect.Field;12import java.lang.reflect.InvocationTargetException;13import java.util.ArrayList;14import java.util.List;15import java.util.Set;16/**17 * Injection strategy based on constructor.18 *19 * <p>20 * The strategy will search for the constructor with most parameters21 * and try to resolve mocks by type.22 * </p>23 *24 * <blockquote>25 * TODO on missing mock type, shall it abandon or create "noname" mocks.26 * TODO and what if the arg type is not mockable.27 * </blockquote>28 *29 * <p>30 * For now the algorithm tries to create anonymous mocks if an argument type is missing.31 * If not possible the algorithm abandon resolution.32 * </p>33 */34public class ConstructorInjection extends MockInjectionStrategy {35    public ConstructorInjection() { }36    public boolean processInjection(Field field, Object fieldOwner, Set<Object> mockCandidates) {37        try {38            SimpleArgumentResolver simpleArgumentResolver = new SimpleArgumentResolver(mockCandidates);39            FieldInitializationReport report = new FieldInitializer(fieldOwner, field, simpleArgumentResolver).initialize();40            return report.fieldWasInitializedUsingContructorArgs();41        } catch (MockitoException e) {42            if(e.getCause() instanceof InvocationTargetException) {43                Throwable realCause = e.getCause().getCause();44                throw fieldInitialisationThrewException(field, realCause);45            }46            // other causes should be fine47            return false;48        }49    }50    /**51     * Returns mocks that match the argument type, if not possible assigns null.52     */53    static class SimpleArgumentResolver implements ConstructorArgumentResolver {...

FieldInitializer

Using AI Code Generation

1import org.mockito.internal.util.reflection.FieldInitializer;2import org.mockito.internal.util.reflection.FieldReader;3public class Main {4    public static void main(String[] args) {5        FieldInitializer fieldInitializer = new FieldInitializer();6        FieldReader fieldReader = new FieldReader();7        TestClass testClass = new TestClass();8        fieldInitializer.initializeFields(testClass);9        System.out.println("name: "+fieldReader.readField("name", testClass));10        System.out.println("age: "+fieldReader.readField("age", testClass));11        System.out.println("address: "+fieldReader.readField("address", testClass));12    }13}14import org.mockito.internal.util.reflection.FieldInitializer;15import org.mockito.internal.util.reflection.FieldReader;16public class Main {17    public static void main(String[] args) {18        FieldInitializer fieldInitializer = new FieldInitializer();19        FieldReader fieldReader = new FieldReader();20        TestClass testClass = new TestClass();21        fieldInitializer.initializeFields(testClass);22        System.out.println("name: "+fieldReader.readField("name", testClass));23        System.out.println("age: "+fieldReader.readField("age", testClass));24        System.out.println("address: "+fieldReader.readField("address", testClass));25    }26}27import org.mockito.internal.util.reflection.FieldInitializer;28import org.mockito.internal.util.reflection.FieldReader;29public class Main {30    public static void main(String[] args) {31        FieldInitializer fieldInitializer = new FieldInitializer();32        FieldReader fieldReader = new FieldReader();33        TestClass testClass = new TestClass();34        fieldInitializer.initializeFields(testClass);35        System.out.println("name: "+fieldReader.readField("name", testClass));36        System.out.println("age: "+fieldReader.readField("age", testClass));37        System.out.println("address: "+fieldReader.readField("address", testClass));38    }39}40import org.mockito.internal.util.reflection.FieldInitializer;41import org.mockito.internal.util.reflection.FieldReader;42public class Main {43    public static void main(String[] args) {

FieldInitializer

Using AI Code Generation

1package com.mycompany.app;2import org.mockito.internal.util.reflection.FieldInitializer;3{4    public static void main( String[] args )5    {6        FieldInitializer fieldInitializer = new FieldInitializer();7        fieldInitializer.initializeFields(new Object());8    }9}10package com.mycompany.app;11import org.mockito.internal.util.reflection.FieldInitializer;12{13    public static void main( String[] args )14    {15        FieldInitializer fieldInitializer = new FieldInitializer();16        fieldInitializer.initializeFields(new Object());17    }18}19Exception in thread "main" java.lang.RuntimeException: java.lang.NoSuchMethodError: org.mockito.internal.util.reflection.FieldInitializer.initializeFields(Ljava/lang/Object;)V20	at org.mockito.internal.util.reflection.FieldInitializer.initializeFields(FieldInitializer.java:17)21	at com.mycompany.app.App.main(App.java:10)22Caused by: java.lang.NoSuchMethodError: org.mockito.internal.util.reflection.FieldInitializer.initializeFields(Ljava/lang/Object;)V23	at com.mycompany.app.App.main(App.java:10)

FieldInitializer

Using AI Code Generation

1import org.mockito.internal.util.reflection.FieldInitializer;2import org.mockito.internal.util.reflection.FieldInitializationReport;3public class FieldInitializerTest {4    public static void main(String[] args) {5        FieldInitializerTest test = new FieldInitializerTest();6        test.testInitializeFields();7    }8    public void testInitializeFields() {9        FieldInitializer initializer = new FieldInitializer();10        FieldInitializationReport report = initializer.initializeFields(this);11        System.out.println(report);12    }13    private int i = 0;14    public int getI() {

FieldInitializer

Using AI Code Generation

1package com.test;2import org.mockito.internal.util.reflection.FieldInitializer;3import org.mockito.internal.util.reflection.FieldReader;4public class Test {5public static void main(String[] args) {6FieldInitializer fieldInitializer = new FieldInitializer();7fieldInitializer.initializeFields(new Test(), new FieldReader() {8public Object read(Object target, String name) {9if ("name".equals(name)) {10return "Test";11}12return null;13}14});15System.out.println(name);16}17}

FieldInitializer

Using AI Code Generation

1package org.mockito.internal.util.reflection;2import org.mockito.internal.util.reflection.FieldInitializer;3import java.lang.reflect.Field;4import java.lang.reflect.Modifier;5public class FieldInitializer {6    private static final Field[] NO_FIELDS = new Field[0];7    private final Object target;8    private final Field field;9    private final Object value;10    public FieldInitializer(Object target, Field field, Object value) {11        this.target = target;12        this.field = field;13        this.value = value;14    }15    public static FieldInitializer of(Object target, Field field, Object value) {16        return new FieldInitializer(target, field, value);17    }18    public static FieldInitializer of(Object target, String fieldName, Object value) {19        Field field = findField(target.getClass(), fieldName);20        if (field == null) {21            throw new RuntimeException("Cannot find field '" + fieldName + "' on " + target);22        }23        return of(target, field, value);24    }25    public static Field findField(Class<?> clazz, String fieldName) {26        for (Field field : clazz.getDeclaredFields()) {27            if (field.getName().equals(fieldName)) {28                return field;29            }30        }31        return null;32    }33    public static Field[] findFields(Class<?> clazz) {34        return clazz.getDeclaredFields();35    }36    public static FieldInitializer of(Object target, String fieldName) {37        return of(target, fieldName, null);38    }39    public FieldInitializer initialize() {40        if (field == null) {41            return this;42        }43        try {44            field.setAccessible(true);45            field.set(target, value);46        } catch (Exception e) {47            throw new RuntimeException("Cannot set field value on " + field, e);48        }49        return this;50    }51    public FieldInitializer initializeAll() {52        for (Field field : findFields(target.getClass())) {53            of(target, field, value).initialize();54        }55        return this;56    }57    public FieldInitializer initializeAllExcept(String... fieldNames) {58        for (Field field : findFields(target.getClass())) {59            if (!isIn(field.getName(), fieldNames)) {60                of(target, field, value).initialize();61            }62        }63        return this;64    }65    public FieldInitializer initializeAllExcept(Field... fields) {66        for (Field field : findFields(target.getClass())) {67            if (!isIn(field, fields)) {68                of(target, field, value).initialize();

FieldInitializer

Using AI Code Generation

1import org.mockito.internal.util.reflection.FieldInitializer;2class Test {3    public static void main(String[] args) {4        FieldInitializer fieldInitializer = new FieldInitializer();5        fieldInitializer.initializeFields(new Test(), new Test());6    }7}8import org.mockito.internal.util.reflection.FieldInitializer;9class Test {10    private int a;11    public static void main(String[] args) {12        Test test1 = new Test();13        Test test2 = new Test();14        test1.a = 10;15        FieldInitializer fieldInitializer = new FieldInitializer();16        fieldInitializer.initializeFields(test1, test2);17        System.out.println(test1.a);18    }19}

FieldInitializer

Using AI Code Generation

1package org.mockito.internal.util.reflection;2import java.lang.reflect.Field;3public class FieldInitializer {4    public static void setField(Object obj, Field field, Object value) {5        boolean wasAccessible = field.isAccessible();6        try {7            field.setAccessible(true);8            field.set(obj, value);9        } catch (IllegalAccessException e) {10            throw new RuntimeException(e);11        } finally {12            field.setAccessible(wasAccessible);13        }14    }15}16package org.mockito.internal.util.reflection;17import java.lang.reflect.Field;18public class FieldInitializer {19    public static void setField(Object obj, Field field, Object value) {20        boolean wasAccessible = field.isAccessible();21        try {22            field.setAccessible(true);23            field.set(obj, value);24        } catch (IllegalAccessException e) {25            throw new RuntimeException(e);26        } finally {27            field.setAccessible(wasAccessible);28        }29    }30}31package org.mockito.internal.util.reflection;32import java.lang.reflect.Field;33public class FieldInitializer {34    public static void setField(Object obj, Field field, Object value) {35        boolean wasAccessible = field.isAccessible();36        try {37            field.setAccessible(true);38            field.set(obj, value);39        } catch (IllegalAccessException e) {40            throw new RuntimeException(e);41        } finally {42            field.setAccessible(wasAccessible);43        }44    }45}46package org.mockito.internal.util.reflection;47import java.lang.reflect.Field;48public class FieldInitializer {49    public static void setField(Object obj, Field field, Object value) {50        boolean wasAccessible = field.isAccessible();51        try {52            field.setAccessible(true);53            field.set(obj, value);54        } catch (IllegalAccessException e) {55            throw new RuntimeException(e);56        } finally {57            field.setAccessible(wasAccessible);58        }59    }60}

FieldInitializer

Using AI Code Generation

1package com.mycompany.myapp;2import org.mockito.internal.util.reflection.FieldInitializer;3public class MyClass1 {4    private String str;5    public MyClass1() {6        FieldInitializer.initialize(this);7    }8    public String getStr() {9        return str;10    }11}12package com.mycompany.myapp;13import org.mockito.internal.util.reflection.FieldInitializer;14public class MyClass2 {15    private String str;16    public MyClass2() {17        FieldInitializer.initialize(this);18    }19    public String getStr() {20        return str;21    }22}23package com.mycompany.myapp;24import org.mockito.internal.util.reflection.FieldInitializer;25public class MyClass3 {26    private String str;27    public MyClass3() {28        FieldInitializer.initialize(this);29    }30    public String getStr() {31        return str;32    }33}34package com.mycompany.myapp;35import org.mockito.internal.util.reflection.FieldInitializer;36public class MyClass4 {37    private String str;38    public MyClass4() {39        FieldInitializer.initialize(this);40    }41    public String getStr() {42        return str;43    }44}45package com.mycompany.myapp;46import org.mockito.internal.util.reflection.FieldInitializer;47public class MyClass5 {48    private String str;49    public MyClass5() {50        FieldInitializer.initialize(this);51    }52    public String getStr() {53        return str;54    }55}56package com.mycompany.myapp;57import org.mockito.internal.util.reflection.FieldInitializer;58public class MyClass6 {59    private String str;60    public MyClass6() {61        FieldInitializer.initialize(this);62    }63    public String getStr() {64        return str;65    }66}

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