Auto-configure codec customizations and JSON when using @WebFluxTest

Closes gh-15070

Author: wilkinsona

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

@@ -179,6 +179,11 @@
 			<artifactId>logback-classic</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.module</groupId>
+			<artifactId>jackson-module-parameter-names</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>

spring-boot-project/spring-boot-test-autoconfigure/src/main/java/org/springframework/boot/test/autoconfigure/web/reactive/WebFluxTest.java

@@ -28,6 +28,7 @@
 import org.springframework.boot.test.autoconfigure.OverrideAutoConfiguration;
 import org.springframework.boot.test.autoconfigure.core.AutoConfigureCache;
 import org.springframework.boot.test.autoconfigure.filter.TypeExcludeFilters;
+import org.springframework.boot.test.autoconfigure.json.AutoConfigureJson;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.mock.mockito.MockBean;
 import org.springframework.context.annotation.ComponentScan;
@@ -73,6 +74,7 @@
 @OverrideAutoConfiguration(enabled = false)
 @TypeExcludeFilters(WebFluxTypeExcludeFilter.class)
 @AutoConfigureCache
+@AutoConfigureJson
 @AutoConfigureWebFlux
 @AutoConfigureWebTestClient
 @ImportAutoConfiguration

spring-boot-project/spring-boot-test-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -83,6 +83,7 @@ org.springframework.boot.test.autoconfigure.web.reactive.WebTestClientAutoConfig
 
 # AutoConfigureWebFlux auto-configuration imports
 org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebFlux=\
+org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration,\
 org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration,\
 org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration,\
 org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfiguration

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/reactive/webclient/ExamplePojo.java

@@ -0,0 +1,45 @@
+/*
+ * 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.autoconfigure.web.reactive.webclient;
+
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+
+/**
+ * Example POJO used with {@link WebFluxTest} tests.
+ *
+ * @author Andy Wilkinson
+ */
+public class ExamplePojo {
+
+	private final String alpha;
+
+	private final String bravo;
+
+	public ExamplePojo(String alpha, String bravo) {
+		this.alpha = alpha;
+		this.bravo = bravo;
+	}
+
+	public String getAlpha() {
+		return this.alpha;
+	}
+
+	public String getBravo() {
+		return this.bravo;
+	}
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/reactive/webclient/JsonController.java

@@ -0,0 +1,40 @@
+/*
+ * 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.web.reactive.webclient;
+
+import reactor.core.publisher.Mono;
+
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * Example {@link Controller} used with {@link WebFluxTest} tests.
+ *
+ * @author Andy Wilkinson
+ */
+@RestController
+public class JsonController {
+
+	@GetMapping(value = "/json", produces = MediaType.APPLICATION_JSON_VALUE)
+	public Mono<ExamplePojo> json() {
+		return Mono.just(new ExamplePojo("a", "b"));
+	}
+
+}

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/reactive/webclient/WebFluxTestAllControllersIntegrationTests.java

@@ -48,4 +48,9 @@ public void shouldFindController2() {
 				.expectBody(String.class).isEqualTo("two");
 	}
 
+	@Test
+	public void shouldFindJsonController() {
+		this.webClient.get().uri("/json").exchange().expectStatus().isOk();
+	}
+
 }

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/reactive/webclient/WebFluxTestAutoConfigurationIntegrationTests.java

@@ -25,6 +25,7 @@
 import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
 import org.springframework.context.ApplicationContext;
 import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.WebTestClient;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.springframework.boot.test.autoconfigure.AutoConfigurationImportedCondition.importedAutoConfiguration;
@@ -53,4 +54,11 @@ public void validationAutoConfigurationIsImported() {
 				.has(importedAutoConfiguration(ValidationAutoConfiguration.class));
 	}
 
+	@Test
+	public void whatever() {
+		WebTestClient client = this.applicationContext.getBean(WebTestClient.class);
+
+		System.out.println(client);
+	}
+
 }

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/reactive/webclient/WebFluxTestWebTestClientCodecCustomizationIntegrationTests.java

@@ -0,0 +1,46 @@
+/*
+ * 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.autoconfigure.web.reactive.webclient;
+
+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;
+
+/**
+ * Tests for {@link WebFluxTest} to validate the {@link WebTestClient WebTestClient's}
+ * codecs are customized.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+@WebFluxTest(controllers = JsonController.class)
+public class WebFluxTestWebTestClientCodecCustomizationIntegrationTests {
+
+	@Autowired
+	private WebTestClient webClient;
+
+	@Test
+	public void shouldBeAbleToCreatePojoViaParametersModule() {
+		this.webClient.get().uri("/json").exchange().expectStatus().isOk()
+				.expectBody(ExamplePojo.class);
+	}
+
+}