How to use inferFrom method of org.mockito.internal.util.reflection.GenericMetadataSupport class

Best Mockito code snippet using org.mockito.internal.util.reflection.GenericMetadataSupport.inferFrom

Source:GenericMetadataSupportTest.java Github

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...4 */5package org.mockito.internal.util.reflection;6import static org.fest.assertions.Assertions.assertThat;7import static org.junit.Assert.fail;8import static org.mockito.internal.util.reflection.GenericMetadataSupport.inferFrom;9import java.io.Serializable;10import java.lang.reflect.Method;11import java.lang.reflect.Type;12import java.lang.reflect.TypeVariable;13import java.util.ArrayList;14import java.util.Collection;15import java.util.Iterator;16import java.util.List;17import java.util.Map;18import java.util.Set;19import org.junit.Test;20public class GenericMetadataSupportTest {21 22 interface GenericsSelfReference<T extends GenericsSelfReference<T>> {23 T self();24 }25 interface UpperBoundedTypeWithClass<E extends Number & Comparable<E>> {26 E get();27 }28 interface UpperBoundedTypeWithInterfaces<E extends Comparable<E> & Cloneable> {29 E get();30 }31 interface ListOfNumbers extends List<Number> {}32 interface ListOfAnyNumbers<N extends Number & Cloneable> extends List<N> {}33 interface GenericsNest<K extends Comparable<K> & Cloneable> extends Map<K, Set<Number>> {34 Set<Number> remove(Object key); // override with fixed ParameterizedType35 List<? super Integer> returning_wildcard_with_class_lower_bound();36 List<? super K> returning_wildcard_with_typeVar_lower_bound();37 List<? extends K> returning_wildcard_with_typeVar_upper_bound();38 K returningK();39 <O extends K> List<O> paramType_with_type_params();40 <S, T extends S> T two_type_params();41 <O extends K> O typeVar_with_type_params();42 }43 static class StringList extends ArrayList<String> { }44 @Test45 public void typeVariable_of_self_type() {46 GenericMetadataSupport genericMetadata = inferFrom(GenericsSelfReference.class).resolveGenericReturnType(firstNamedMethod("self", GenericsSelfReference.class));47 assertThat(genericMetadata.rawType()).isEqualTo(GenericsSelfReference.class);48 }49 @Test50 public void can_get_raw_type_from_Class() throws Exception {51 assertThat(inferFrom(ListOfAnyNumbers.class).rawType()).isEqualTo(ListOfAnyNumbers.class);52 assertThat(inferFrom(ListOfNumbers.class).rawType()).isEqualTo(ListOfNumbers.class);53 assertThat(inferFrom(GenericsNest.class).rawType()).isEqualTo(GenericsNest.class);54 assertThat(inferFrom(StringList.class).rawType()).isEqualTo(StringList.class);55 }56 @Test57 public void can_get_raw_type_from_ParameterizedType() throws Exception {58 assertThat(inferFrom(ListOfAnyNumbers.class.getGenericInterfaces()[0]).rawType()).isEqualTo(List.class);59 assertThat(inferFrom(ListOfNumbers.class.getGenericInterfaces()[0]).rawType()).isEqualTo(List.class);60 assertThat(inferFrom(GenericsNest.class.getGenericInterfaces()[0]).rawType()).isEqualTo(Map.class);61 assertThat(inferFrom(StringList.class.getGenericSuperclass()).rawType()).isEqualTo(ArrayList.class);62 }63 @Test64 public void can_get_type_variables_from_Class() throws Exception {65 assertThat(inferFrom(GenericsNest.class).actualTypeArguments().keySet()).hasSize(1).onProperty("name").contains("K");66 assertThat(inferFrom(ListOfNumbers.class).actualTypeArguments().keySet()).isEmpty();67 assertThat(inferFrom(ListOfAnyNumbers.class).actualTypeArguments().keySet()).hasSize(1).onProperty("name").contains("N");68 assertThat(inferFrom(Map.class).actualTypeArguments().keySet()).hasSize(2).onProperty("name").contains("K", "V");69 assertThat(inferFrom(Serializable.class).actualTypeArguments().keySet()).isEmpty();70 assertThat(inferFrom(StringList.class).actualTypeArguments().keySet()).isEmpty();71 }72 @Test73 public void can_get_type_variables_from_ParameterizedType() throws Exception {74 assertThat(inferFrom(GenericsNest.class.getGenericInterfaces()[0]).actualTypeArguments().keySet()).hasSize(2).onProperty("name").contains("K", "V");75 assertThat(inferFrom(ListOfAnyNumbers.class.getGenericInterfaces()[0]).actualTypeArguments().keySet()).hasSize(1).onProperty("name").contains("E");76 assertThat(inferFrom(Integer.class.getGenericInterfaces()[0]).actualTypeArguments().keySet()).hasSize(1).onProperty("name").contains("T");77 assertThat(inferFrom(StringBuilder.class.getGenericInterfaces()[0]).actualTypeArguments().keySet()).isEmpty();78 assertThat(inferFrom(StringList.class).actualTypeArguments().keySet()).isEmpty();79 }80 @Test81 public void typeVariable_return_type_of____iterator____resolved_to_Iterator_and_type_argument_to_String() throws Exception {82 GenericMetadataSupport genericMetadata = inferFrom(StringList.class).resolveGenericReturnType(firstNamedMethod("iterator", StringList.class));83 assertThat(genericMetadata.rawType()).isEqualTo(Iterator.class);84 assertThat(genericMetadata.actualTypeArguments().values()).contains(String.class);85 }86 @Test87 public void typeVariable_return_type_of____get____resolved_to_Set_and_type_argument_to_Number() throws Exception {88 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("get", GenericsNest.class));89 assertThat(genericMetadata.rawType()).isEqualTo(Set.class);90 assertThat(genericMetadata.actualTypeArguments().values()).contains(Number.class);91 }92 @Test93 public void bounded_typeVariable_return_type_of____returningK____resolved_to_Comparable_and_with_BoundedType() throws Exception {94 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("returningK", GenericsNest.class));95 assertThat(genericMetadata.rawType()).isEqualTo(Comparable.class);96 GenericMetadataSupport extraInterface_0 = inferFrom(genericMetadata.extraInterfaces().get(0));97 assertThat(extraInterface_0.rawType()).isEqualTo(Cloneable.class);98 }99 @Test100 public void fixed_ParamType_return_type_of____remove____resolved_to_Set_and_type_argument_to_Number() throws Exception {101 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("remove", GenericsNest.class));102 assertThat(genericMetadata.rawType()).isEqualTo(Set.class);103 assertThat(genericMetadata.actualTypeArguments().values()).contains(Number.class);104 }105 @Test106 public void paramType_return_type_of____values____resolved_to_Collection_and_type_argument_to_Parameterized_Set() throws Exception {107 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("values", GenericsNest.class));108 assertThat(genericMetadata.rawType()).isEqualTo(Collection.class);109 GenericMetadataSupport fromTypeVariableE = inferFrom(typeVariableValue(genericMetadata.actualTypeArguments(), "E"));110 assertThat(fromTypeVariableE.rawType()).isEqualTo(Set.class);111 assertThat(fromTypeVariableE.actualTypeArguments().values()).contains(Number.class);112 }113 @Test114 public void paramType_with_type_parameters_return_type_of____paramType_with_type_params____resolved_to_Collection_and_type_argument_to_Parameterized_Set() throws Exception {115 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("paramType_with_type_params", GenericsNest.class));116 assertThat(genericMetadata.rawType()).isEqualTo(List.class);117 Type firstBoundOfE = ((GenericMetadataSupport.TypeVarBoundedType) typeVariableValue(genericMetadata.actualTypeArguments(), "E")).firstBound();118 assertThat(inferFrom(firstBoundOfE).rawType()).isEqualTo(Comparable.class);119 }120 @Test121 public void typeVariable_with_type_parameters_return_type_of____typeVar_with_type_params____resolved_K_hence_to_Comparable_and_with_BoundedType() throws Exception {122 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("typeVar_with_type_params", GenericsNest.class));123 assertThat(genericMetadata.rawType()).isEqualTo(Comparable.class);124 GenericMetadataSupport extraInterface_0 = inferFrom(genericMetadata.extraInterfaces().get(0));125 assertThat(extraInterface_0.rawType()).isEqualTo(Cloneable.class);126 }127 @Test128 public void class_return_type_of____append____resolved_to_StringBuilder_and_type_arguments() throws Exception {129 GenericMetadataSupport genericMetadata = inferFrom(StringBuilder.class).resolveGenericReturnType(firstNamedMethod("append", StringBuilder.class));130 assertThat(genericMetadata.rawType()).isEqualTo(StringBuilder.class);131 assertThat(genericMetadata.actualTypeArguments()).isEmpty();132 }133 @Test134 public void paramType_with_wildcard_return_type_of____returning_wildcard_with_class_lower_bound____resolved_to_List_and_type_argument_to_Integer() throws Exception {135 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("returning_wildcard_with_class_lower_bound", GenericsNest.class));136 assertThat(genericMetadata.rawType()).isEqualTo(List.class);137 GenericMetadataSupport.BoundedType boundedType = (GenericMetadataSupport.BoundedType) typeVariableValue(genericMetadata.actualTypeArguments(), "E");138 assertThat(boundedType.firstBound()).isEqualTo(Integer.class);139 assertThat(boundedType.interfaceBounds()).isEmpty();140 }141 @Test142 public void paramType_with_wildcard_return_type_of____returning_wildcard_with_typeVar_lower_bound____resolved_to_List_and_type_argument_to_Integer() throws Exception {143 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("returning_wildcard_with_typeVar_lower_bound", GenericsNest.class));144 assertThat(genericMetadata.rawType()).isEqualTo(List.class);145 GenericMetadataSupport.BoundedType boundedType = (GenericMetadataSupport.BoundedType) typeVariableValue(genericMetadata.actualTypeArguments(), "E");146 assertThat(inferFrom(boundedType.firstBound()).rawType()).isEqualTo(Comparable.class);147 assertThat(boundedType.interfaceBounds()).contains(Cloneable.class); }148 @Test149 public void paramType_with_wildcard_return_type_of____returning_wildcard_with_typeVar_upper_bound____resolved_to_List_and_type_argument_to_Integer() throws Exception {150 GenericMetadataSupport genericMetadata = inferFrom(GenericsNest.class).resolveGenericReturnType(firstNamedMethod("returning_wildcard_with_typeVar_upper_bound", GenericsNest.class));151 assertThat(genericMetadata.rawType()).isEqualTo(List.class);152 GenericMetadataSupport.BoundedType boundedType = (GenericMetadataSupport.BoundedType) typeVariableValue(genericMetadata.actualTypeArguments(), "E");153 assertThat(inferFrom(boundedType.firstBound()).rawType()).isEqualTo(Comparable.class);154 assertThat(boundedType.interfaceBounds()).contains(Cloneable.class);155 }156 private Type typeVariableValue(Map<TypeVariable, Type> typeVariables, String typeVariableName) {157 for (Map.Entry<TypeVariable, Type> typeVariableTypeEntry : typeVariables.entrySet()) {158 if (typeVariableTypeEntry.getKey().getName().equals(typeVariableName)) {159 return typeVariableTypeEntry.getValue();160 }161 }162 fail("'" + typeVariableName + "' was not found in " + typeVariables);163 return null; // unreachable164 }165 private Method firstNamedMethod(String methodName, Class<?> clazz) {166 for (Method method : clazz.getMethods()) {167 boolean protect_against_different_jdk_ordering_avoiding_bridge_methods = !method.isBridge();...

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1import org.mockito.internal.util.reflection.GenericMetadataSupport2import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType3import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType.GenericArrayType4import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType.ParameterizedType5import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType.TypeVariable6import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType.WildcardType7def genericType = new GenericMetadataSupport().inferFrom(ArrayList.class, Number.class)8def genericType = new GenericMetadataSupport().inferFrom(ArrayList.class, Integer.class)9def genericType = new GenericMetadataSupport().inferFrom(ArrayList.class, String.class)10def genericType = new GenericMetadataSupport().inferFrom(ArrayList.class, Object.class)11def genericType = new GenericMetadataSupport().inferFrom(ArrayList.class, List.class)12def genericType = new GenericMetadataSupport().inferFrom(ArrayList.class, ArrayList.class)

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1import org.mockito.internal.util.reflection.GenericMetadataSupport;2import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType;3import org.mockito.internal.util.reflection.GenericMetadataSupport.InferredType;4import java.lang.reflect.Method;5import java.lang.reflect.Type;6import java.util.List;7public class MockTest {8 public static void main(String[] args) throws Exception {9 Method method = MockTest.class.getMethod("test", List.class);10 Type[] genericParameterTypes = method.getGenericParameterTypes();11 GenericType genericType = new GenericType(genericParameterTypes[0]);12 InferredType inferredType = new GenericMetadataSupport().inferFrom(genericType);13 System.out.println("inferredType: " + inferredType);14 }15 public void test(List<String> list) {16 }17}18import org.mockito.internal.util.reflection.GenericMetadataSupport;19import org.mockito.internal.util.reflection.GenericMetadataSupport.GenericType;20import org.mockito.internal.util.reflection.GenericMetadataSupport.InferredType;21import java.lang.reflect.Method;22import java.lang.reflect.Type;23import java.util.List;24public class MockTest {25 public static void main(String[] args) throws Exception {26 Method method = MockTest.class.getMethod("test", List.class);27 Type[] genericParameterTypes = method.getGenericParameterTypes();28 GenericType genericType = new GenericType(genericParameterTypes[0]);29 InferredType inferredType = new GenericMetadataSupport().inferFrom(genericType);30 System.out.println("inferredType: " + inferredType);31 }32 public void test(List<String> list) {33 }34}

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1import org.mockito.internal.util.reflection.GenericMetadataSupport;2public class GenericMetadataSupportTest {3 public static void main(String[] args) {4 GenericMetadataSupport genericMetadataSupport = new GenericMetadataSupport();5 Class<?> inferFrom = genericMetadataSupport.inferFrom(Child.class, Child.class, 0);6 System.out.println(inferFrom);7 }8}9class Parent<T> {10 T obj;11}12class Child extends Parent<String> {13}14Mockito’s mock() Method15Mockito’s when() Method16Mockito’s verify() Method17Mockito’s mock() Method18import org.mockito.Mockito;19public class MockitoMockMethodExample {20 public static void main(String[] args) {21 ArrayList mockList = Mockito.mock(ArrayList.class);22 }23}24Mockito’s when() Method25The OngoingStubbing class provides the thenReturn() method. We can use this method to specify the return value of

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1public class GenericMetadataSupportTest {2 public void testInferFrom() throws Exception {3 GenericMetadataSupport genericMetadataSupport = new GenericMetadataSupport();4 Class<?> classToInferFrom = GenericMetadataSupport.class;5 Class<?> typeToInfer = genericMetadataSupport.inferFrom(classToInferFrom, GenericMetadataSupport.class, "inferFrom");6 assertThat(typeToInfer).isEqualTo(Class.class);7 }8}9private static <T> T inferFrom(Class<?> type, Class<?> genericType, String methodName) {10 return new GenericMetadataSupport().inferFrom(type, genericType, methodName);11}12private static Class<?> inferFrom(Class<?> type, String methodName) {13 return inferFrom(type, Class.class, methodName);14}15private static Class<?> inferFrom(Class<?> type, String methodName, int parameterIndex) {16 return inferFrom(type, Class.class, methodName, parameterIndex);17}18private static <T> T inferFrom(Class<?> type, Class<?> genericType, String methodName, int parameterIndex) {19 return new GenericMetadataSupport().inferFrom(type, genericType, methodName, parameterIndex);20}21private static Class<?> inferFrom(Class<?> type, String methodName, int parameterIndex) {22 return inferFrom(type, Class.class, methodName, parameterIndex);23}24private static Class<?> inferFrom(Class<?> type, String methodName, int parameterIndex) {25 return inferFrom(type, Class.class, methodName, parameterIndex);26}27private static <T> T inferFrom(Class<?> type, Class<?> genericType, String methodName) {28 return new GenericMetadataSupport().inferFrom(type, genericType, methodName);29}30private static Class<?> inferFrom(Class<?> type, String methodName) {31 return inferFrom(type, Class.class, methodName);32}33private static Class<?> inferFrom(Class<?> type, String methodName, int parameterIndex) {

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1public class GenericMetadataSupportTest {2 public static class GenericType<T> {3 public T value;4 }5 public static class GenericTypeWithMultipleTypeParameters<T1, T2> {6 public T1 value1;7 public T2 value2;8 }9 public static class GenericTypeWithMultipleTypeParametersAndBounds<T1 extends Number, T2 extends String> {10 public T1 value1;11 public T2 value2;12 }13 public static class GenericTypeWithExtendsTypeParameter<T extends Number> {14 public T value;15 }16 public static class GenericTypeWithSuperTypeParameter<T super String> {17 public T value;18 }19 public static class GenericTypeWithMultipleExtendsTypeParameters<T1 extends Number, T2 extends String> {20 public T1 value1;21 public T2 value2;22 }23 public static class GenericTypeWithMultipleSuperTypeParameters<T1 super Number, T2 super String> {24 public T1 value1;25 public T2 value2;26 }27 public static class GenericTypeWithMultipleExtendsAndSuperTypeParameters<T1 extends Number, T2 super String> {28 public T1 value1;29 public T2 value2;30 }31 public static class GenericTypeWithMultipleExtendsAndSuperTypeParametersAndBounds<T1 extends Number, T2 super String, T3 extends String, T4 super Integer> {32 public T1 value1;33 public T2 value2;34 public T3 value3;35 public T4 value4;36 }37 public static class GenericTypeWithMultipleExtendsAndSuperTypeParametersAndBoundsAndVoid<T1 extends Number, T2 super String, T3 extends String, T4 super Integer, T5> {38 public T1 value1;39 public T2 value2;40 public T3 value3;41 public T4 value4;42 public T5 value5;43 }44 public static class GenericTypeWithMultipleExtendsAndSuperTypeParametersAndBoundsAndVoidAndArray<T1 extends Number, T2 super String, T3 extends String, T4 super Integer, T5, T6[]> {45 public T1 value1;46 public T2 value2;47 public T3 value3;48 public T4 value4;49 public T5 value5;50 public T6[] value6;51 }

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1import org.mockito.internal.util.reflection.GenericMetadataSupport;2import org.mockito.internal.util.reflection.GenericMetadataSupport.*;3import java.lang.reflect.*;4import java.util.*;5import static java.lang.System.out;6class A<T> {7 List<T> list;8}9class B extends A<String> {10 List<String> list;11}12class C extends A<Integer> {13 List<Integer> list;14}15class D extends A<String> {16 List<Integer> list;17}18class E extends A<Integer> {19 List<String> list;20}21public class Test {22 public static void main(String... args) throws NoSuchFieldException {23 out.println("A<String>:");24 out.println("A.list: " + GenericMetadataSupport.inferFrom(A.class, A.class.getField("list")));25 out.println("B.list: " + GenericMetadataSupport.inferFrom(B.class, B.class.getField("list")));26 out.println("C.list: " + GenericMetadataSupport.inferFrom(C.class, C.class.getField("list")));27 out.println("D.list: " + GenericMetadataSupport.inferFrom(D.class, D.class.getField("list")));28 out.println("E.list: " + GenericMetadataSupport.inferFrom(E.class, E.class.getField("list")));29 }30}

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