Make it easier to customize the auto-configured MockMvcBuilder

Closes gh-5556

spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcAutoConfiguration.java

@@ -16,7 +16,8 @@
 
 package org.springframework.boot.test.autoconfigure.web.servlet;
 
-import org.springframework.beans.factory.annotation.Autowired;
+import java.util.List;
+
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
@@ -35,6 +36,7 @@ import org.springframework.web.context.WebApplicationContext;
  * Auto-configuration for {@link MockMvc}.
  *
  * @author Phillip Webb
+ * @author Andy Wilkinson
  * @see ImportWebMvcAutoConfiguration
  */
 @Configuration
@@ -43,20 +45,27 @@ import org.springframework.web.context.WebApplicationContext;
 @EnableConfigurationProperties
 class MockMvcAutoConfiguration {
 
-	@Autowired
-	private WebApplicationContext context;
+	private final WebApplicationContext context;
+
+	MockMvcAutoConfiguration(WebApplicationContext context) {
+		this.context = context;
+	}
 
 	@Bean
 	@ConditionalOnMissingBean(MockMvcBuilder.class)
-	public DefaultMockMvcBuilder mockMvcBuilder() {
-		return MockMvcBuilders.webAppContextSetup(this.context)
-				.apply(mockMvcConfigurer());
+	public DefaultMockMvcBuilder mockMvcBuilder(
+			List<MockMvcBuilderCustomizer> customizers) {
+		DefaultMockMvcBuilder builder = MockMvcBuilders.webAppContextSetup(this.context);
+		for (MockMvcBuilderCustomizer customizer : customizers) {
+			customizer.customize(builder);
+		}
+		return builder;
 	}
 
 	@Bean
 	@ConfigurationProperties("spring.test.mockmvc")
-	public SpringBootMockMvcConfigurer mockMvcConfigurer() {
-		return new SpringBootMockMvcConfigurer(this.context);
+	public SpringBootMockMvcBuilderCustomizer springBootMockMvcBuilderCustomizer() {
+		return new SpringBootMockMvcBuilderCustomizer(this.context);
 	}
 
 	@Bean

spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/MockMvcBuilderCustomizer.java

@@ -0,0 +1,39 @@
+/*
+ * 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.autoconfigure.web.servlet;
+
+import org.springframework.test.web.servlet.MockMvcBuilder;
+import org.springframework.test.web.servlet.setup.ConfigurableMockMvcBuilder;
+
+/**
+ * A customizer for a {@link ConfigurableMockMvcBuilder}. Any
+ * {@code MockMvcBuilderCustomizer} beans found in the application context will be
+ * {@link #customize called} to customize the auto-configured {@link MockMvcBuilder}.
+ *
+ * @author Andy Wilkinson
+ * @since 1.4.0
+ * @see MockMvcAutoConfiguration
+ */
+public interface MockMvcBuilderCustomizer {
+
+	/**
+	 * Customize the given {@code builder}.
+	 * @param builder the builder
+	 */
+	void customize(ConfigurableMockMvcBuilder<?> builder);
+
+}

spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/servlet/SpringBootMockMvcBuilderCustomizer.java

@@ -24,22 +24,21 @@ import org.springframework.boot.context.embedded.DelegatingFilterProxyRegistrati
 import org.springframework.boot.context.embedded.FilterRegistrationBean;
 import org.springframework.boot.context.embedded.ServletContextInitializer;
 import org.springframework.boot.context.embedded.ServletContextInitializerBeans;
-import org.springframework.test.web.servlet.request.RequestPostProcessor;
 import org.springframework.test.web.servlet.result.MockMvcResultHandlers;
 import org.springframework.test.web.servlet.setup.ConfigurableMockMvcBuilder;
-import org.springframework.test.web.servlet.setup.MockMvcConfigurer;
 import org.springframework.util.Assert;
 import org.springframework.web.context.WebApplicationContext;
 
 /**
- * {@link MockMvcConfigurer} for a typical Spring Boot application. Usually applied
+ * {@link MockMvcBuilderCustomizer} for a typical Spring Boot application. Usually applied
  * automatically via {@link AutoConfigureMockMvc @AutoConfigureMockMvc}, but may also be
  * used directly.
  *
  * @author Phillip Webb
+ * @author Andy Wilkinson
  * @since 1.4.0
  */
-public class SpringBootMockMvcConfigurer implements MockMvcConfigurer {
+public class SpringBootMockMvcBuilderCustomizer implements MockMvcBuilderCustomizer {
 
 	private final WebApplicationContext context;
 
@@ -48,16 +47,16 @@ public class SpringBootMockMvcConfigurer implements MockMvcConfigurer {
 	private boolean alwaysPrint = true;
 
 	/**
-	 * Create a new {@link SpringBootMockMvcConfigurer} instance.
+	 * Create a new {@link SpringBootMockMvcBuilderCustomizer} instance.
 	 * @param context the source application context
 	 */
-	public SpringBootMockMvcConfigurer(WebApplicationContext context) {
+	public SpringBootMockMvcBuilderCustomizer(WebApplicationContext context) {
 		Assert.notNull(context, "Context must not be null");
 		this.context = context;
 	}
 
 	@Override
-	public void afterConfigurerAdded(ConfigurableMockMvcBuilder<?> builder) {
+	public void customize(ConfigurableMockMvcBuilder<?> builder) {
 		if (this.addFilters) {
 			addFilters(builder);
 		}
@@ -66,12 +65,6 @@ public class SpringBootMockMvcConfigurer implements MockMvcConfigurer {
 		}
 	}
 
-	@Override
-	public RequestPostProcessor beforeMockMvcCreated(
-			ConfigurableMockMvcBuilder<?> builder, WebApplicationContext context) {
-		return null;
-	}
-
 	private void addFilters(ConfigurableMockMvcBuilder<?> builder) {
 		ServletContextInitializerBeans Initializers = new ServletContextInitializerBeans(
 				this.context);