Integration with REST-assured

core/src/main/java/org/microshed/testing/jupiter/MicroShedTestExtension.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 IBM Corporation and others
+ * Copyright (c) 2019,2020 IBM Corporation and others
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information regarding copyright ownership.
@@ -21,6 +21,7 @@
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
+import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
@@ -44,15 +45,16 @@
  */
 class MicroShedTestExtension implements BeforeAllCallback {
 
-    static final Logger LOGGER = LoggerFactory.getLogger(MicroShedTestExtension.class);
+    static final Logger LOG = LoggerFactory.getLogger(MicroShedTestExtension.class);
 
     @Override
     public void beforeAll(ExtensionContext context) throws Exception {
         Class<?> testClass = context.getRequiredTestClass();
         ApplicationEnvironment config = ApplicationEnvironment.load();
-        LOGGER.info("Using ApplicationEnvironment class: " + config.getClass().getCanonicalName());
+        LOG.info("Using ApplicationEnvironment class: " + config.getClass().getCanonicalName());
         config.applyConfiguration(testClass);
         config.start();
+        configureRestAssured(config);
         injectRestClients(testClass);
     }
 
@@ -79,7 +81,7 @@ private static void injectRestClients(Class<?> clazz) {
             Object restClient = rcBuilder.build(restClientField.getType());
             try {
                 restClientField.set(null, restClient);
-                LOGGER.debug("Injected rest client for " + restClientField);
+                LOG.debug("Injected rest client for " + restClientField);
             } catch (Exception e) {
                 throw new ExtensionConfigurationException("Unable to set field " + restClientField, e);
             }
@@ -99,14 +101,60 @@ private static String createJwtIfNeeded(Field restClientField) {
         return null;
     }
 
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    private static void configureRestAssured(ApplicationEnvironment config) {
+        Class<?> RestAssured = tryLoad("io.restassured.RestAssured");
+        if (RestAssured == null)
+            return;
+
+        try {
+            URL appURL = new URL(config.getApplicationURL());
+            String baseURI = appURL.getProtocol() + "://" + appURL.getHost();
+            int port = appURL.getPort();
+            String basePath = appURL.getPath();
+            LOG.info("Configuring RestAssured with baseURI=" + baseURI + "  port=" + port + "  basePath=" + basePath);
+
+            RestAssured.getField("baseURI").set(null, baseURI);
+            RestAssured.getField("basePath").set(null, basePath);
+            RestAssured.getField("port").set(null, port);
+        } catch (Exception e) {
+            LOG.warn("Unable to configure REST Assured because of: " + e.getMessage(), e);
+        }
+
+        try {
+            // Configure JSONB as the JSON object mapper by invoking:
+            //   ObjectMapperType JSONB = ObjectMapperType.JSONB;
+            //   ObjectMapperConfig omConfig = ObjectMapperConfig.objectMapperConfig().defaultObjectMapperType(JSONB);
+            //   RestAssured.config = RestAssured.config.objectMapperConfig(omConfig);
+            ClassLoader cl = MicroShedTestExtension.class.getClassLoader();
+            Class<Enum> ObjectMapperType = (Class<Enum>) Class.forName("io.restassured.mapper.ObjectMapperType", false, cl);
+            Object JSONB = Enum.valueOf(ObjectMapperType, "JSONB");
+            Class<?> ObjectMapperConfig = Class.forName("io.restassured.config.ObjectMapperConfig", false, cl);
+            Object omConfig = ObjectMapperConfig.getMethod("objectMapperConfig").invoke(null);
+            omConfig = omConfig.getClass().getMethod("defaultObjectMapperType", ObjectMapperType).invoke(omConfig, JSONB);
+            Class<?> RestAssuredConfig = Class.forName("io.restassured.config.RestAssuredConfig", false, cl);
+            Object raConfig = RestAssured.getField("config").get(null);
+            raConfig = RestAssuredConfig.getMethod("objectMapperConfig", ObjectMapperConfig).invoke(raConfig, omConfig);
+            RestAssured.getField("config").set(null, raConfig);
+            LOG.debug("Regsitered JSONB ObjectMapper for REST Assured");
+        } catch (IllegalArgumentException e) {
+            // Prior to RestAssured 4.2.0 the ObjectMapperType.JSONB enum is not available
+            LOG.debug("Unable to configure JSON-B object mapper for REST Assured", e);
+        } catch (Exception e) {
+            LOG.warn("Unable to configure JSON-B object mapper for REST Assured", e);
+        }
+    }
+
     @SuppressWarnings("unchecked")
     private static Optional<Class<? extends Annotation>> getMpRestClient() {
+        return Optional.ofNullable((Class<? extends Annotation>) tryLoad("org.eclipse.microprofile.rest.client.inject.RestClient"));
+    }
+
+    private static Class<?> tryLoad(String clazz) {
         try {
-            return Optional.of((Class<? extends Annotation>) Class.forName("org.eclipse.microprofile.rest.client.inject.RestClient",
-                                                                           false,
-                                                                           MicroShedTestExtension.class.getClassLoader()));
+            return Class.forName(clazz, false, MicroShedTestExtension.class.getClassLoader());
         } catch (ClassNotFoundException | LinkageError e) {
-            return Optional.empty();
+            return null;
         }
     }
 }

docs/features/14_RestAssured.md

@@ -0,0 +1,106 @@
+---
+layout: post
+title: "REST Assured"
+---
+
+MicroShed Testing provides auto-configuration for when [REST Assured](https://github.com/rest-assured/rest-assured) is available on the test classpath. REST Assured is a Java DSL library for easy testing of REST services. It is more verbose than using a REST client, but offers more direct control over the request and response.f
+
+## Enable REST Assured
+
+To enable REST Assured, add the following dependency to your pom.xml:
+
+```xml
+<dependency>
+    <groupId>io.rest-assured</groupId>
+    <artifactId>rest-assured</artifactId>
+    <version>4.2.0</version>
+    <scope>test</scope>
+</dependency>
+```
+
+Any version of REST Assured will have basic integration with MicroShed Testing -- the application URL and port will be auto-configured.
+
+As of REST Assured 4.2.0 or newer, a JSON-B based JSON ObjectMapper will be auto-configured.
+
+Because of the auto-configuration, no specific configuration is required in your test classes.
+
+## Example usage
+
+Validating a simple `GET` request:
+
+```java
+import static io.restassured.RestAssured.given;
+import static io.restassured.http.ContentType.JSON;
+// ...
+
+@MicroShedTest
+public class RestAssuredTest {
+
+    @Container
+    public static ApplicationContainer app = new ApplicationContainer()
+                    .withAppContextRoot("/myservice");
+
+    @Test
+    public void testCreatePerson() {
+        given()
+          .queryParam("name", "Hank")
+          .queryParam("age", 45)
+          .contentType(JSON)
+        .when()
+          .post("/")
+        .then()
+          .statusCode(200)
+          .contentType(JSON);
+    }
+}
+```
+
+It is also possible to send/receive POJOs with the JSON-B based ObjectMapper:
+
+```java
+    @Test
+    public void testGetPerson() {
+        // First create the Person
+        long bobId = given()
+                        .queryParam("name", "Bob")
+                        .queryParam("age", 24)
+                        .contentType(JSON)
+                     .when()
+                        .post("/")
+                     .then()
+                        .statusCode(200)
+                        .contentType(JSON)
+                     .extract()
+                        .as(long.class);
+
+        // Validate new created Person can be retrieved
+        Person bob = given()
+                        .pathParam("personId", bobId)
+                      .when()
+                        .get("/{personId}")
+                      .then()
+                        .statusCode(200)
+                        .contentType(JSON)
+                      .extract()
+                        .as(Person.class);
+        assertEquals("Bob", bob.name);
+        assertEquals(24, bob.age);
+        assertNotNull(bob.id);
+    }
+```
+
+For a complete working example, see the [RestAssuredTest class](https://github.com/MicroShed/microshed-testing/blob/master/sample-apps/everything-app/src/test/java/org/example/app/RestAssuredTest.java)
+
+## Auto-configuration override
+
+If you would like to use a different JSON ObjectMapper besides the default (JSON-B/Yasson), you can run the following code in your test initialization flow:
+
+```java
+import io.restassured.RestAssured;
+import io.restassured.config.ObjectMapperConfig;
+import io.restassured.mapper.ObjectMapperType;
+// ...
+
+ObjectMapperConfig omConfig = ObjectMapperConfig.objectMapperConfig().defaultObjectMapperType(ObjectMapperType.JACKSON_2);
+RestAssured.config = RestAssured.config.objectMapperConfig(omConfig);
+```

docs/features/98_Examples.md

@@ -9,6 +9,7 @@ Sometimes code is worth a thousand words. Here are some pointers to working exam
 
 - [Basic JAX-RS application using Gradle](https://github.com/MicroShed/microshed-testing/tree/master/sample-apps/jaxrs-json)
 - [Basic JAX-RS application using Maven](https://github.com/MicroShed/microshed-testing/tree/master/sample-apps/maven-app)
+- [Basic JAX-RS application using REST Assured](https://github.com/MicroShed/microshed-testing/blob/master/sample-apps/everything-app/src/test/java/org/example/app/RestAssuredTest.java)
 - [JAX-RS and JDBC applicaiton using a PostgreSQL database](https://github.com/MicroShed/microshed-testing/tree/master/sample-apps/jdbc-app) 
 - [JAX-RS application secured with MP JWT](https://github.com/MicroShed/microshed-testing/tree/master/sample-apps/jaxrs-mpjwt)
 - [JAX-RS and MongoDB application that depends on an external REST service](https://github.com/MicroShed/microshed-testing/tree/master/sample-apps/everything-app)

sample-apps/everything-app/build.gradle

@@ -10,6 +10,7 @@ dependencies {
   testCompile group: 'org.slf4j', name: 'slf4j-log4j12', version: '1.7.29'
   testCompile 'org.testcontainers:mockserver:1.12.3'
   testCompile 'org.mock-server:mockserver-client-java:5.5.4'
+  testCompile 'io.rest-assured:rest-assured:4.2.0'
   testImplementation 'org.junit.jupiter:junit-jupiter:5.5.2'
 }