Prevent beans created with @MockBean from being post-processed

Post-processing of mocked beans causes a number of problems:

 - The mock may be proxied for asynchronous processing which can cause
   problems when configuring expectations on a mock (gh-6573)
 - The mock may be proxied so that its return values can be cached or
   so that its methods can be transactional. This causes problems with
   verification of the expected calls to a mock (gh-6573, gh-5837)
 - If the mock is created from a class that uses field injection, the
   container will attempt to inject values into its fields. This causes
   problems if the mock is being created to avoid the use of one of
   those dependencies (gh-6663)
 - Proxying a mocked bean can lead to a JDK proxy being created
   (if proxyTargetClass=false) as the mock implements a Mockito
   interface. This can then cause injection failures as the types don’t
   match (gh-6405, gh-6665)

All of these problems can be avoided if a mocked bean is not
post-processed. Avoiding post-processing prevents proxies from being
created and autowiring from being performed. This commit avoids
post-processing by registering mocked beans as singletons as well as
via a bean definition. The latter is still used by the context for type
matching purposes.

Closes gh-6573, gh-6663, gh-6664

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/DefinitionsParser.java

@@ -92,8 +92,7 @@ class DefinitionsParser {
 		for (ResolvableType typeToMock : typesToMock) {
 			MockDefinition definition = new MockDefinition(annotation.name(), typeToMock,
 					annotation.extraInterfaces(), annotation.answer(),
-					annotation.serializable(), annotation.reset(),
-					annotation.proxyTargetAware());
+					annotation.serializable(), annotation.reset());
 			addDefinition(element, definition, "mock");
 		}
 	}

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/MockBean.java

@@ -26,7 +26,6 @@ import java.lang.annotation.Target;
 import org.junit.runner.RunWith;
 import org.mockito.Answers;
 import org.mockito.MockSettings;
-import org.mockito.Mockito;
 
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.annotation.AliasFor;
@@ -140,15 +139,4 @@ public @interface MockBean {
 	 */
 	MockReset reset() default MockReset.AFTER;
 
-	/**
-	 * Indicates that Mockito methods such as {@link Mockito#verify(Object) verify(mock)}
-	 * should use the {@code target} of AOP advised beans, rather than the proxy itself.
-	 * If set to {@code false} you may need to use the result of
-	 * {@link org.springframework.test.util.AopTestUtils#getUltimateTargetObject(Object)
-	 * AopTestUtils.getUltimateTargetObject(...)} when calling Mockito methods.
-	 * @return {@code true} if the target of AOP advised beans is used or {@code false} if
-	 * the proxy is used directly
-	 */
-	boolean proxyTargetAware() default true;
-
 }

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/MockDefinition.java

@@ -54,13 +54,12 @@ class MockDefinition extends Definition {
 	}
 
 	MockDefinition(ResolvableType typeToMock) {
-		this(null, typeToMock, null, null, false, null, true);
+		this(null, typeToMock, null, null, false, null);
 	}
 
 	MockDefinition(String name, ResolvableType typeToMock, Class<?>[] extraInterfaces,
-			Answers answer, boolean serializable, MockReset reset,
-			boolean proxyTargetAware) {
-		super(name, reset, proxyTargetAware);
+			Answers answer, boolean serializable, MockReset reset) {
+		super(name, reset, false);
 		Assert.notNull(typeToMock, "TypeToMock must not be null");
 		this.typeToMock = typeToMock;
 		this.extraInterfaces = asClassSet(extraInterfaces);

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/MockitoBeans.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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.boot.test.mock.mockito;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * Beans created using Mockito.
+ *
+ * @author Andy Wilkinson
+ */
+public class MockitoBeans implements Iterable<Object> {
+
+	private final List<Object> beans = new ArrayList<Object>();
+
+	void add(Object bean) {
+		this.beans.add(bean);
+	}
+
+	@Override
+	public Iterator<Object> iterator() {
+		return this.beans.iterator();
+	}
+
+}

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/MockitoPostProcessor.java

@@ -94,6 +94,8 @@ public class MockitoPostProcessor extends InstantiationAwareBeanPostProcessorAda
 
 	private final BeanNameGenerator beanNameGenerator = new DefaultBeanNameGenerator();
 
+	private final MockitoBeans mockitoBeans = new MockitoBeans();
+
 	private Map<Definition, String> beanNameRegistry = new HashMap<Definition, String>();
 
 	private Map<Field, RegisteredField> fieldRegistry = new HashMap<Field, RegisteredField>();
@@ -132,6 +134,7 @@ public class MockitoPostProcessor extends InstantiationAwareBeanPostProcessorAda
 
 	private void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory,
 			BeanDefinitionRegistry registry) {
+		beanFactory.registerSingleton(MockitoBeans.class.getName(), this.mockitoBeans);
 		DefinitionsParser parser = new DefinitionsParser(this.definitions);
 		for (Class<?> configurationClass : getConfigurationClasses(beanFactory)) {
 			parser.parse(configurationClass);
@@ -182,7 +185,13 @@ public class MockitoPostProcessor extends InstantiationAwareBeanPostProcessorAda
 		String beanName = getBeanName(beanFactory, registry, definition, beanDefinition);
 		beanDefinition.getConstructorArgumentValues().addIndexedArgumentValue(1,
 				beanName);
+		if (registry.containsBeanDefinition(beanName)) {
+			registry.removeBeanDefinition(beanName);
+		}
 		registry.registerBeanDefinition(beanName, beanDefinition);
+		Object mock = createMock(definition, beanName);
+		beanFactory.registerSingleton(beanName, mock);
+		this.mockitoBeans.add(mock);
 		this.beanNameRegistry.put(definition, beanName);
 		if (field != null) {
 			this.fieldRegistry.put(field, new RegisteredField(definition, beanName));

spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/ResetMocksTestExecutionListener.java

@@ -22,6 +22,7 @@ import java.util.Set;
 
 import org.mockito.Mockito;
 
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.context.ApplicationContext;
@@ -70,6 +71,17 @@ public class ResetMocksTestExecutionListener extends AbstractTestExecutionListen
 				}
 			}
 		}
+		try {
+			MockitoBeans mockedBeans = beanFactory.getBean(MockitoBeans.class);
+			for (Object mockedBean : mockedBeans) {
+				if (reset.equals(MockReset.get(mockedBean))) {
+					Mockito.reset(mockedBean);
+				}
+			}
+		}
+		catch (NoSuchBeanDefinitionException ex) {
+			// Continue
+		}
 		if (applicationContext.getParent() != null) {
 			resetMocks(applicationContext.getParent(), reset);
 		}

spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockBeanWithAopProxyAndNotProxyTargetAwareTests.java

@@ -1,91 +0,0 @@
-/*
- * Copyright 2012-2016 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
- *
- *      http://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.boot.test.mock.mockito;
-
-import java.util.Arrays;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.exceptions.misusing.UnfinishedVerificationException;
-
-import org.springframework.cache.CacheManager;
-import org.springframework.cache.annotation.Cacheable;
-import org.springframework.cache.annotation.EnableCaching;
-import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
-import org.springframework.cache.interceptor.CacheResolver;
-import org.springframework.cache.interceptor.SimpleCacheResolver;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Import;
-import org.springframework.stereotype.Service;
-import org.springframework.test.context.junit4.SpringRunner;
-
-import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
-
-/**
- * Test {@link MockBean} when mixed with Spring AOP.
- *
- * @author Phillip Webb
- * @see <a href="https://github.com/spring-projects/spring-boot/issues/5837">5837</a>
- */
-@RunWith(SpringRunner.class)
-public class MockBeanWithAopProxyAndNotProxyTargetAwareTests {
-
-	@MockBean(proxyTargetAware = false)
-	private DateService dateService;
-
-	@Test(expected = UnfinishedVerificationException.class)
-	public void verifyShouldUseProxyTarget() throws Exception {
-		this.dateService.getDate();
-		verify(this.dateService, times(1)).getDate();
-		reset(this.dateService);
-	}
-
-	@Configuration
-	@EnableCaching(proxyTargetClass = true)
-	@Import(DateService.class)
-	static class Config {
-
-		@Bean
-		public CacheResolver cacheResolver(CacheManager cacheManager) {
-			SimpleCacheResolver resolver = new SimpleCacheResolver();
-			resolver.setCacheManager(cacheManager);
-			return resolver;
-		}
-
-		@Bean
-		public ConcurrentMapCacheManager cacheManager() {
-			ConcurrentMapCacheManager cacheManager = new ConcurrentMapCacheManager();
-			cacheManager.setCacheNames(Arrays.asList("test"));
-			return cacheManager;
-		}
-
-	}
-
-	@Service
-	static class DateService {
-
-		@Cacheable(cacheNames = "test")
-		public Long getDate() {
-			return System.nanoTime();
-		}
-
-	}
-
-}

spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockBeanWithAopProxyTests.java

@@ -34,6 +34,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
@@ -51,11 +52,13 @@ public class MockBeanWithAopProxyTests {
 
 	@Test
 	public void verifyShouldUseProxyTarget() throws Exception {
+		given(this.dateService.getDate()).willReturn(1L);
 		Long d1 = this.dateService.getDate();
-		Thread.sleep(200);
+		assertThat(d1).isEqualTo(1L);
+		given(this.dateService.getDate()).willReturn(2L);
 		Long d2 = this.dateService.getDate();
-		assertThat(d1).isEqualTo(d2);
-		verify(this.dateService, times(1)).getDate();
+		assertThat(d2).isEqualTo(2L);
+		verify(this.dateService, times(2)).getDate();
 	}
 
 	@Configuration

spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockBeanWithAsyncInterfaceMethodIntegrationTests.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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.boot.test.mock.mockito;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+
+/**
+ * Tests for a mock bean where the mocked interface has an async method.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+public class MockBeanWithAsyncInterfaceMethodIntegrationTests {
+
+	@MockBean
+	private Transformer transformer;
+
+	@Autowired
+	private MyService service;
+
+	@Test
+	public void mockedMethodsAreNotAsync() {
+		given(this.transformer.transform("foo")).willReturn("bar");
+		assertThat(this.service.transform("foo")).isEqualTo("bar");
+	}
+
+	private interface Transformer {
+
+		@Async
+		String transform(String input);
+
+	}
+
+	private static class MyService {
+
+		private final Transformer transformer;
+
+		MyService(Transformer transformer) {
+			this.transformer = transformer;
+		}
+
+		public String transform(String input) {
+			return this.transformer.transform(input);
+		}
+
+	}
+
+	@Configuration
+	@EnableAsync
+	static class MyConfiguration {
+
+		@Bean
+		public MyService myService(Transformer transformer) {
+			return new MyService(transformer);
+		}
+	}
+
+}

spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockBeanWithInjectedFieldIntegrationTests.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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.boot.test.mock.mockito;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+
+/**
+ * Tests for a mock bean where the class being mocked uses field injection.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+public class MockBeanWithInjectedFieldIntegrationTests {
+
+	@MockBean
+	private MyService myService;
+
+	@Test
+	public void fieldInjectionIntoMyServiceMockIsNotAttempted() {
+		given(this.myService.getCount()).willReturn(5);
+		assertThat(this.myService.getCount()).isEqualTo(5);
+	}
+
+	private static class MyService {
+
+		@Autowired
+		private MyRepository repository;
+
+		public int getCount() {
+			return this.repository.findAll().size();
+		}
+
+	}
+
+	private interface MyRepository {
+
+		List<Object> findAll();
+
+	}
+
+}

spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/MockDefinitionTests.java

@@ -43,16 +43,16 @@ public class MockDefinitionTests {
 	public ExpectedException thrown = ExpectedException.none();
 
 	@Test
-	public void ClassToMockMustNotBeNull() throws Exception {
+	public void classToMockMustNotBeNull() throws Exception {
 		this.thrown.expect(IllegalArgumentException.class);
 		this.thrown.expectMessage("TypeToMock must not be null");
-		new MockDefinition(null, null, null, null, false, null, true);
+		new MockDefinition(null, null, null, null, false, null);
 	}
 
 	@Test
 	public void createWithDefaults() throws Exception {
 		MockDefinition definition = new MockDefinition(null, EXAMPLE_SERVICE_TYPE, null,
-				null, false, null, true);
+				null, false, null);
 		assertThat(definition.getName()).isNull();
 		assertThat(definition.getTypeToMock()).isEqualTo(EXAMPLE_SERVICE_TYPE);
 		assertThat(definition.getExtraInterfaces()).isEmpty();
@@ -65,7 +65,7 @@ public class MockDefinitionTests {
 	public void createExplicit() throws Exception {
 		MockDefinition definition = new MockDefinition("name", EXAMPLE_SERVICE_TYPE,
 				new Class<?>[] { ExampleExtraInterface.class },
-				Answers.RETURNS_SMART_NULLS, true, MockReset.BEFORE, false);
+				Answers.RETURNS_SMART_NULLS, true, MockReset.BEFORE);
 		assertThat(definition.getName()).isEqualTo("name");
 		assertThat(definition.getTypeToMock()).isEqualTo(EXAMPLE_SERVICE_TYPE);
 		assertThat(definition.getExtraInterfaces())
@@ -80,7 +80,7 @@ public class MockDefinitionTests {
 	public void createMock() throws Exception {
 		MockDefinition definition = new MockDefinition("name", EXAMPLE_SERVICE_TYPE,
 				new Class<?>[] { ExampleExtraInterface.class },
-				Answers.RETURNS_SMART_NULLS, true, MockReset.BEFORE, true);
+				Answers.RETURNS_SMART_NULLS, true, MockReset.BEFORE);
 		ExampleService mock = definition.createMock();
 		MockCreationSettings<?> settings = new MockUtil().getMockSettings(mock);
 		assertThat(mock).isInstanceOf(ExampleService.class);

spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/ResetMocksTestExecutionListenerTests.java

@@ -67,17 +67,23 @@ public class ResetMocksTestExecutionListenerTests {
 	static class Config {
 
 		@Bean
-		public ExampleService before() {
-			return mock(ExampleService.class, MockReset.before());
+		public ExampleService before(MockitoBeans mockedBeans) {
+			ExampleService mock = mock(ExampleService.class, MockReset.before());
+			mockedBeans.add(mock);
+			return mock;
 		}
 
 		@Bean
-		public ExampleService after() {
-			return mock(ExampleService.class, MockReset.before());
+		public ExampleService after(MockitoBeans mockedBeans) {
+			ExampleService mock = mock(ExampleService.class, MockReset.before());
+			mockedBeans.add(mock);
+			return mock;
 		}
 
 		@Bean
-		public ExampleService none() {
+		public ExampleService none(MockitoBeans mockedBeans) {
+			ExampleService mock = mock(ExampleService.class, MockReset.before());
+			mockedBeans.add(mock);
 			return mock(ExampleService.class);
 		}