Reinject mocks when context is dirtied before each method

Closes gh-11903

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

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -24,10 +24,10 @@ import java.util.Set;
 import org.mockito.Captor;
 import org.mockito.MockitoAnnotations;
 
-import org.springframework.context.ApplicationContext;
 import org.springframework.test.context.TestContext;
 import org.springframework.test.context.TestExecutionListener;
 import org.springframework.test.context.support.AbstractTestExecutionListener;
+import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.util.ReflectionUtils.FieldCallback;
 
@@ -37,16 +37,35 @@ import org.springframework.util.ReflectionUtils.FieldCallback;
  * annotations.
  *
  * @author Phillip Webb
+ * @author Andy Wilkinson
  * @since 1.4.2
  */
 public class MockitoTestExecutionListener extends AbstractTestExecutionListener {
 
 	@Override
 	public void prepareTestInstance(TestContext testContext) throws Exception {
+		initMocks(testContext);
+		injectFields(testContext);
+	}
+
+	@Override
+	public void beforeTestMethod(TestContext testContext) throws Exception {
+		if (Boolean.TRUE.equals(testContext.getAttribute(
+				DependencyInjectionTestExecutionListener.REINJECT_DEPENDENCIES_ATTRIBUTE))) {
+			initMocks(testContext);
+			reinjectFields(testContext);
+		}
+	}
+
+	@Override
+	public int getOrder() {
+		return 1950;
+	}
+
+	private void initMocks(TestContext testContext) {
 		if (hasMockitoAnnotations(testContext)) {
 			MockitoAnnotations.initMocks(testContext.getTestInstance());
 		}
-		injectFields(testContext);
 	}
 
 	private boolean hasMockitoAnnotations(TestContext testContext) {
@@ -56,21 +75,46 @@ public class MockitoTestExecutionListener extends AbstractTestExecutionListener
 	}
 
 	private void injectFields(TestContext testContext) {
+		postProcessFields(testContext, new MockitoFieldHandler() {
+
+			@Override
+			public void handle(MockitoField mockitoField,
+					MockitoPostProcessor postProcessor) {
+				postProcessor.inject(mockitoField.field, mockitoField.target,
+						mockitoField.definition);
+			}
+
+		});
+	}
+
+	private void reinjectFields(final TestContext testContext) {
+		postProcessFields(testContext, new MockitoFieldHandler() {
+
+			@Override
+			public void handle(MockitoField mockitoField,
+					MockitoPostProcessor postProcessor) {
+				ReflectionUtils.makeAccessible(mockitoField.field);
+				ReflectionUtils.setField(mockitoField.field,
+						testContext.getTestInstance(), null);
+				postProcessor.inject(mockitoField.field, mockitoField.target,
+						mockitoField.definition);
+			}
+
+		});
+	}
+
+	private void postProcessFields(TestContext testContext, MockitoFieldHandler handler) {
 		DefinitionsParser parser = new DefinitionsParser();
 		parser.parse(testContext.getTestClass());
 		if (!parser.getDefinitions().isEmpty()) {
-			injectFields(testContext, parser);
-		}
-	}
-
-	private void injectFields(TestContext testContext, DefinitionsParser parser) {
-		ApplicationContext applicationContext = testContext.getApplicationContext();
-		MockitoPostProcessor postProcessor = applicationContext
-				.getBean(MockitoPostProcessor.class);
-		for (Definition definition : parser.getDefinitions()) {
-			Field field = parser.getField(definition);
-			if (field != null) {
-				postProcessor.inject(field, testContext.getTestInstance(), definition);
+			MockitoPostProcessor postProcessor = testContext.getApplicationContext()
+					.getBean(MockitoPostProcessor.class);
+			for (Definition definition : parser.getDefinitions()) {
+				Field field = parser.getField(definition);
+				if (field != null) {
+					handler.handle(new MockitoField(field, testContext.getTestInstance(),
+							definition), postProcessor);
+				}
 			}
 		}
 	}
@@ -98,4 +142,26 @@ public class MockitoTestExecutionListener extends AbstractTestExecutionListener
 
 	}
 
+	private static final class MockitoField {
+
+		private final Field field;
+
+		private final Object target;
+
+		private final Definition definition;
+
+		private MockitoField(Field field, Object instance, Definition definition) {
+			this.field = field;
+			this.target = instance;
+			this.definition = definition;
+		}
+
+	}
+
+	private interface MockitoFieldHandler {
+
+		void handle(MockitoField mockitoField, MockitoPostProcessor postProcessor);
+
+	}
+
 }

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

+/*
+ * Copyright 2012-2018 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.boot.test.mock.mockito.example.ExampleService;
+import org.springframework.boot.test.mock.mockito.example.ExampleServiceCaller;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.annotation.DirtiesContext.ClassMode;
+import org.springframework.test.annotation.DirtiesContext.MethodMode;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+
+/**
+ * Integration tests for using {@link MockBean} with {@link DirtiesContext} and
+ * {@link MethodMode#BEFORE_METHOD}.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+@DirtiesContext(classMode = ClassMode.BEFORE_EACH_TEST_METHOD)
+public class MockBeanWithDirtiesContextClassModeBeforeMethodIntegrationTests {
+
+	@MockBean
+	private ExampleService exampleService;
+
+	@Autowired
+	private ExampleServiceCaller caller;
+
+	@Test
+	public void testMocking() throws Exception {
+		given(this.exampleService.greeting()).willReturn("Boot");
+		assertThat(this.caller.sayGreeting()).isEqualTo("I say Boot");
+	}
+
+	@Configuration
+	@Import(ExampleServiceCaller.class)
+	static class Config {
+
+	}
+
+}

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

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -28,6 +28,7 @@ import org.mockito.MockitoAnnotations;
 
 import org.springframework.context.ApplicationContext;
 import org.springframework.test.context.TestContext;
+import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.BDDMockito.given;
@@ -35,6 +36,7 @@ import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
 
 /**
  * Tests for {@link MockitoTestExecutionListener}.
@@ -78,6 +80,28 @@ public class MockitoTestExecutionListenerTests {
 		assertThat(this.fieldCaptor.getValue().getName()).isEqualTo("mockBean");
 	}
 
+	@Test
+	public void beforeTestMethodShouldDoNothingWhenDirtiesContextAttributeIsNotSet()
+			throws Exception {
+		WithMockBean instance = new WithMockBean();
+		this.listener.beforeTestMethod(mockTestContext(instance));
+		verifyNoMoreInteractions(this.postProcessor);
+	}
+
+	@Test
+	public void beforeTestMethodShouldInjectMockBeanWhenDirtiesContextAttributeIsSet()
+			throws Exception {
+		WithMockBean instance = new WithMockBean();
+		TestContext mockTestContext = mockTestContext(instance);
+		given(mockTestContext.getAttribute(
+				DependencyInjectionTestExecutionListener.REINJECT_DEPENDENCIES_ATTRIBUTE))
+						.willReturn(Boolean.TRUE);
+		this.listener.beforeTestMethod(mockTestContext);
+		verify(this.postProcessor).inject(this.fieldCaptor.capture(), eq(instance),
+				(MockDefinition) any());
+		assertThat(this.fieldCaptor.getValue().getName()).isEqualTo("mockBean");
+	}
+
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	private TestContext mockTestContext(Object instance) {
 		TestContext testContext = mock(TestContext.class);

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

+/*
+ * Copyright 2012-2018 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.boot.test.mock.mockito.example.ExampleServiceCaller;
+import org.springframework.boot.test.mock.mockito.example.SimpleExampleService;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.annotation.DirtiesContext.ClassMode;
+import org.springframework.test.annotation.DirtiesContext.MethodMode;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.mockito.Mockito.verify;
+
+/**
+ * Integration tests for using {@link SpyBean} with {@link DirtiesContext} and
+ * {@link MethodMode#BEFORE_METHOD}.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+@DirtiesContext(classMode = ClassMode.BEFORE_EACH_TEST_METHOD)
+public class SpyBeanWithDirtiesContextClassModeBeforeMethodIntegrationTests {
+
+	@SpyBean
+	private SimpleExampleService exampleService;
+
+	@Autowired
+	private ExampleServiceCaller caller;
+
+	@Test
+	public void testSpying() throws Exception {
+		this.caller.sayGreeting();
+		verify(this.exampleService).greeting();
+	}
+
+	@Configuration
+	@Import(ExampleServiceCaller.class)
+	static class Config {
+
+	}
+
+}