Add auto-configuration for using REST Docs with WebTestClient

See gh-10969

spring-boot-project/spring-boot-parent/src/checkstyle/checkstyle.xml

@@ -70,7 +70,7 @@
 		<module name="com.puppycrawl.tools.checkstyle.checks.imports.AvoidStarImportCheck" />
 		<module name="com.puppycrawl.tools.checkstyle.checks.imports.AvoidStaticImportCheck">
 			<property name="excludes"
-				value="io.restassured.RestAssured.*, org.assertj.core.api.Assertions.*, org.junit.Assert.*, org.junit.Assume.*, org.junit.internal.matchers.ThrowableMessageMatcher.*, org.hamcrest.CoreMatchers.*, org.hamcrest.Matchers.*, org.springframework.boot.configurationprocessor.ConfigurationMetadataMatchers.*, org.springframework.boot.configurationprocessor.TestCompiler.*, org.springframework.boot.test.autoconfigure.AutoConfigurationImportedCondition.*, org.mockito.Mockito.*, org.mockito.BDDMockito.*, org.mockito.ArgumentMatchers.*, org.mockito.Matchers.*, org.springframework.restdocs.hypermedia.HypermediaDocumentation.*, org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.*, org.springframework.restdocs.operation.preprocess.Preprocessors.*, org.springframework.restdocs.payload.PayloadDocumentation.*, org.springframework.restdocs.request.RequestDocumentation.*, org.springframework.restdocs.restassured3.operation.preprocess.RestAssuredPreprocessors.*, org.springframework.restdocs.restassured3.RestAssuredRestDocumentation.*, org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*, org.springframework.test.web.servlet.result.MockMvcResultMatchers.*, org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.*, org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.*, org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo, org.springframework.test.web.client.ExpectedCount.*, org.springframework.test.web.client.match.MockRestRequestMatchers.*, org.springframework.test.web.client.response.MockRestResponseCreators.*" />
+				value="io.restassured.RestAssured.*, org.assertj.core.api.Assertions.*, org.junit.Assert.*, org.junit.Assume.*, org.junit.internal.matchers.ThrowableMessageMatcher.*, org.hamcrest.CoreMatchers.*, org.hamcrest.Matchers.*, org.springframework.boot.configurationprocessor.ConfigurationMetadataMatchers.*, org.springframework.boot.configurationprocessor.TestCompiler.*, org.springframework.boot.test.autoconfigure.AutoConfigurationImportedCondition.*, org.mockito.Mockito.*, org.mockito.BDDMockito.*, org.mockito.ArgumentMatchers.*, org.mockito.Matchers.*, org.springframework.restdocs.hypermedia.HypermediaDocumentation.*, org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.*, org.springframework.restdocs.operation.preprocess.Preprocessors.*, org.springframework.restdocs.payload.PayloadDocumentation.*, org.springframework.restdocs.request.RequestDocumentation.*, org.springframework.restdocs.restassured3.operation.preprocess.RestAssuredPreprocessors.*, org.springframework.restdocs.restassured3.RestAssuredRestDocumentation.*, org.springframework.restdocs.webtestclient.WebTestClientRestDocumentation.*, org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*, org.springframework.test.web.servlet.result.MockMvcResultMatchers.*, org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.*, org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.*, org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo, org.springframework.test.web.client.ExpectedCount.*, org.springframework.test.web.client.match.MockRestRequestMatchers.*, org.springframework.test.web.client.response.MockRestResponseCreators.*" />
 		</module>
 		<module name="com.puppycrawl.tools.checkstyle.checks.imports.IllegalImportCheck" >
 			<property name="illegalPkgs" value="sun, org.apache.commons.(?!codec|compress|dbcp2|lang|lang3|logging|pool2).*, com.google.common, org.flywaydb.core.internal"/>

spring-boot-project/spring-boot-test-autoconfigure/pom.xml

@@ -152,6 +152,11 @@
 			<artifactId>spring-restdocs-restassured</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.restdocs</groupId>
+			<artifactId>spring-restdocs-webtestclient</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.security</groupId>
 			<artifactId>spring-security-config</artifactId>

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsAutoConfiguration.java

@@ -35,12 +35,15 @@ import org.springframework.restdocs.mockmvc.MockMvcRestDocumentationConfigurer;
 import org.springframework.restdocs.mockmvc.RestDocumentationResultHandler;
 import org.springframework.restdocs.restassured3.RestAssuredRestDocumentation;
 import org.springframework.restdocs.restassured3.RestAssuredRestDocumentationConfigurer;
+import org.springframework.restdocs.webtestclient.WebTestClientRestDocumentation;
+import org.springframework.restdocs.webtestclient.WebTestClientRestDocumentationConfigurer;
 
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for Spring REST Docs.
  *
  * @author Andy Wilkinson
  * @author Eddú Meléndez
+ * @author Roman Zaynetdinov
  * @since 1.4.0
  */
 @Configuration
@@ -108,4 +111,33 @@ public class RestDocsAutoConfiguration {
 
 	}
 
+	@Configuration
+	@ConditionalOnClass(WebTestClientRestDocumentation.class)
+	@ConditionalOnWebApplication(type = Type.REACTIVE)
+	static class RestDocsWebTestClientAutoConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean(WebTestClientRestDocumentationConfigurer.class)
+		public WebTestClientRestDocumentationConfigurer restDocsWebTestClientConfigurer(
+				ObjectProvider<RestDocsWebTestClientConfigurationCustomizer> configurationCustomizerProvider,
+				RestDocumentationContextProvider contextProvider) {
+			WebTestClientRestDocumentationConfigurer configurer = WebTestClientRestDocumentation
+					.documentationConfiguration(contextProvider);
+			RestDocsWebTestClientConfigurationCustomizer configurationCustomizer = configurationCustomizerProvider
+					.getIfAvailable();
+			if (configurationCustomizer != null) {
+				configurationCustomizer.customize(configurer);
+			}
+			return configurer;
+		}
+
+		@Bean
+		@ConfigurationProperties(prefix = "spring.test.restdocs")
+		public RestDocsWebTestClientBuilderCustomizer restDocumentationConfigurer(
+				WebTestClientRestDocumentationConfigurer configurer) {
+			return new RestDocsWebTestClientBuilderCustomizer(configurer);
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsWebTestClientBuilderCustomizer.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2012-2017 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.restdocs;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.boot.test.autoconfigure.web.reactive.WebTestClientBuilderCustomizer;
+import org.springframework.restdocs.webtestclient.WebTestClientRestDocumentationConfigurer;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.util.StringUtils;
+
+/**
+ * A customizer that configures Spring REST Docs with WebTestClient.
+ *
+ * @author Eddú Meléndez
+ * @author Roman Zaynetdinov
+ */
+class RestDocsWebTestClientBuilderCustomizer implements InitializingBean, WebTestClientBuilderCustomizer {
+
+	private final WebTestClientRestDocumentationConfigurer delegate;
+
+	private String uriScheme;
+
+	private String uriHost;
+
+	private Integer uriPort;
+
+	RestDocsWebTestClientBuilderCustomizer(WebTestClientRestDocumentationConfigurer delegate) {
+		this.delegate = delegate;
+	}
+
+	public String getUriScheme() {
+		return this.uriScheme;
+	}
+
+	public void setUriScheme(String uriScheme) {
+		this.uriScheme = uriScheme;
+	}
+
+	public String getUriHost() {
+		return this.uriHost;
+	}
+
+	public void setUriHost(String uriHost) {
+		this.uriHost = uriHost;
+	}
+
+	public Integer getUriPort() {
+		return this.uriPort;
+	}
+
+	public void setUriPort(Integer uriPort) {
+		this.uriPort = uriPort;
+	}
+
+	@Override
+	public void afterPropertiesSet() throws Exception {
+	}
+
+	@Override
+	public void customize(WebTestClient.Builder builder) {
+		if (StringUtils.hasText(this.uriScheme) && StringUtils.hasText(this.uriHost)) {
+			String baseUrl = this.uriScheme + "://" + this.uriHost;
+
+			if (this.uriPort == 80 && this.uriScheme.equals("http")) {
+				// Don't add default port
+			} else if (this.uriPort == 443 && this.uriScheme.equals("https")) {
+				// Don't add default port
+			} else if (this.uriPort != null) {
+				baseUrl += ":" + this.uriPort;
+			}
+
+			builder.baseUrl(baseUrl);
+		}
+		builder.filter(this.delegate);
+	}
+}

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/restdocs/RestDocsWebTestClientConfigurationCustomizer.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012-2017 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.restdocs;
+
+import org.springframework.restdocs.webtestclient.WebTestClientRestDocumentationConfigurer;
+
+/**
+ * A customizer for {@link WebTestClientRestDocumentationConfigurer}. If a
+ * {@code RestDocsWebTestClientConfigurationCustomizer} bean is found in the application context
+ * it will be {@link #customize called} to customize the
+ * {@code WebTestClientRestDocumentationConfigurer} before it is applied. Intended for use only
+ * when the attributes on {@link AutoConfigureRestDocs} do not provide sufficient
+ * customization.
+ *
+ * @author Andy Wilkinson
+ * @author Roman Zaynetdinov
+ * @since 2.0.0
+ */
+@FunctionalInterface
+public interface RestDocsWebTestClientConfigurationCustomizer {
+
+	/**
+	 * Customize the given {@code configurer}.
+	 * @param configurer the configurer
+	 */
+	void customize(WebTestClientRestDocumentationConfigurer configurer);
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/restdocs/WebTestClientRestDocsAutoConfigurationIntegrationTests.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2012-2017 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.restdocs;
+
+import java.io.File;
+
+import org.assertj.core.api.Condition;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.util.FileSystemUtils;
+
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.restdocs.webtestclient.WebTestClientRestDocumentation.document;
+
+/**
+ * Integration tests for {@link RestDocsAutoConfiguration} with WebClientTest.
+ *
+ * @author Andy Wilkinson
+ * @author Roman Zaynetdinov
+ */
+@RunWith(SpringRunner.class)
+@WebFluxTest
+@AutoConfigureRestDocs(uriScheme = "https", uriHost = "api.example.com", uriPort = 443)
+public class WebTestClientRestDocsAutoConfigurationIntegrationTests {
+
+	@Before
+	public void deleteSnippets() {
+		FileSystemUtils.deleteRecursively(new File("target/generated-snippets"));
+	}
+
+	@Autowired
+	private WebTestClient webTestClient;
+
+	@Test
+	public void defaultSnippetsAreWritten() throws Exception {
+		this.webTestClient.get().uri("/").exchange()
+			.expectBody().consumeWith(document("default-snippets"));
+		File defaultSnippetsDir = new File("target/generated-snippets/default-snippets");
+		assertThat(defaultSnippetsDir).exists();
+		assertThat(new File(defaultSnippetsDir, "curl-request.adoc"))
+				.has(contentContaining("'https://api.example.com/'"));
+		assertThat(new File(defaultSnippetsDir, "http-request.adoc"))
+				.has(contentContaining("api.example.com"));
+		assertThat(new File(defaultSnippetsDir, "http-response.adoc")).isFile();
+	}
+
+	private Condition<File> contentContaining(String toContain) {
+		return new ContentContainingCondition(toContain);
+	}
+
+}