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AutowireUtilsTests.java
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AutowireUtilsTests.java
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/*
* Copyright 2002-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.beans.factory.support;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
import org.springframework.util.ReflectionUtils;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Unit tests for {@link AutowireUtils}.
*
* @author Juergen Hoeller
* @author Sam Brannen
* @author Loïc Ledoyen
*/
public class AutowireUtilsTests {
@Test
public void genericMethodReturnTypes() {
Method notParameterized = ReflectionUtils.findMethod(MyTypeWithMethods.class, "notParameterized");
Object actual = AutowireUtils.resolveReturnTypeForFactoryMethod(notParameterized, new Object[0], getClass().getClassLoader());
assertThat(actual).isEqualTo(String.class);
Method notParameterizedWithArguments = ReflectionUtils.findMethod(MyTypeWithMethods.class, "notParameterizedWithArguments", Integer.class, Boolean.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(notParameterizedWithArguments, new Object[]{99, true}, getClass().getClassLoader())).isEqualTo(String.class);
Method createProxy = ReflectionUtils.findMethod(MyTypeWithMethods.class, "createProxy", Object.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createProxy, new Object[]{"foo"}, getClass().getClassLoader())).isEqualTo(String.class);
Method createNamedProxyWithDifferentTypes = ReflectionUtils.findMethod(MyTypeWithMethods.class, "createNamedProxy", String.class, Object.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createNamedProxyWithDifferentTypes, new Object[]{"enigma", 99L}, getClass().getClassLoader())).isEqualTo(Long.class);
Method createNamedProxyWithDuplicateTypes = ReflectionUtils.findMethod(MyTypeWithMethods.class, "createNamedProxy", String.class, Object.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createNamedProxyWithDuplicateTypes, new Object[]{"enigma", "foo"}, getClass().getClassLoader())).isEqualTo(String.class);
Method createMock = ReflectionUtils.findMethod(MyTypeWithMethods.class, "createMock", Class.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createMock, new Object[]{Runnable.class}, getClass().getClassLoader())).isEqualTo(Runnable.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createMock, new Object[]{Runnable.class.getName()}, getClass().getClassLoader())).isEqualTo(Runnable.class);
Method createNamedMock = ReflectionUtils.findMethod(MyTypeWithMethods.class, "createNamedMock", String.class, Class.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createNamedMock, new Object[]{"foo", Runnable.class}, getClass().getClassLoader())).isEqualTo(Runnable.class);
Method createVMock = ReflectionUtils.findMethod(MyTypeWithMethods.class, "createVMock", Object.class, Class.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(createVMock, new Object[]{"foo", Runnable.class}, getClass().getClassLoader())).isEqualTo(Runnable.class);
// Ideally we would expect String.class instead of Object.class, but
// resolveReturnTypeForFactoryMethod() does not currently support this form of
// look-up.
Method extractValueFrom = ReflectionUtils.findMethod(MyTypeWithMethods.class, "extractValueFrom", MyInterfaceType.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(extractValueFrom, new Object[]{new MySimpleInterfaceType()}, getClass().getClassLoader())).isEqualTo(Object.class);
// Ideally we would expect Boolean.class instead of Object.class, but this
// information is not available at run-time due to type erasure.
Map<Integer, Boolean> map = new HashMap<>();
map.put(0, false);
map.put(1, true);
Method extractMagicValue = ReflectionUtils.findMethod(MyTypeWithMethods.class, "extractMagicValue", Map.class);
assertThat(AutowireUtils.resolveReturnTypeForFactoryMethod(extractMagicValue, new Object[]{map}, getClass().getClassLoader())).isEqualTo(Object.class);
}
public interface MyInterfaceType<T> {
}
public class MySimpleInterfaceType implements MyInterfaceType<String> {
}
public static class MyTypeWithMethods<T> {
/**
* Simulates a factory method that wraps the supplied object in a proxy of the
* same type.
*/
public static <T> T createProxy(T object) {
return null;
}
/**
* Similar to {@link #createProxy(Object)} but adds an additional argument before
* the argument of type {@code T}. Note that they may potentially be of the same
* time when invoked!
*/
public static <T> T createNamedProxy(String name, T object) {
return null;
}
/**
* Simulates factory methods found in libraries such as Mockito and EasyMock.
*/
public static <MOCK> MOCK createMock(Class<MOCK> toMock) {
return null;
}
/**
* Similar to {@link #createMock(Class)} but adds an additional method argument
* before the parameterized argument.
*/
public static <T> T createNamedMock(String name, Class<T> toMock) {
return null;
}
/**
* Similar to {@link #createNamedMock(String, Class)} but adds an additional
* parameterized type.
*/
public static <V extends Object, T> T createVMock(V name, Class<T> toMock) {
return null;
}
/**
* Extract some value of the type supported by the interface (i.e., by a concrete,
* non-generic implementation of the interface).
*/
public static <T> T extractValueFrom(MyInterfaceType<T> myInterfaceType) {
return null;
}
/**
* Extract some magic value from the supplied map.
*/
public static <K, V> V extractMagicValue(Map<K, V> map) {
return null;
}
public MyInterfaceType<Integer> integer() {
return null;
}
public MySimpleInterfaceType string() {
return null;
}
public Object object() {
return null;
}
@SuppressWarnings("rawtypes")
public MyInterfaceType raw() {
return null;
}
public String notParameterized() {
return null;
}
public String notParameterizedWithArguments(Integer x, Boolean b) {
return null;
}
public void readIntegerInputMessage(MyInterfaceType<Integer> message) {
}
public void readIntegerArrayInputMessage(MyInterfaceType<Integer>[] message) {
}
public void readGenericArrayInputMessage(T[] message) {
}
}
}