Add dropwizard-e2e module

dropwizard-e2e/pom.xml

@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <prerequisites>
+        <maven>3.0.0</maven>
+    </prerequisites>
+
+    <artifactId>dropwizard-e2e</artifactId>
+    <version>1.1.0-SNAPSHOT</version>
+    <groupId>io.dropwizard</groupId>
+    <name>Dropwizard End-to-end Tests</name>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+
+        <!-- No need to deploy dropwizard-e2e -->
+        <maven.deploy.skip>true</maven.deploy.skip>
+        <maven.site.skip>true</maven.site.skip>
+        <maven.site.deploy.skip>true</maven.site.deploy.skip>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.dropwizard</groupId>
+                <artifactId>dropwizard-bom</artifactId>
+                <version>${project.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.dropwizard</groupId>
+            <artifactId>dropwizard-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.dropwizard</groupId>
+            <artifactId>dropwizard-testing</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.dropwizard</groupId>
+            <artifactId>dropwizard-client</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-enforcer-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>enforce</id>
+                        <configuration>
+                            <rules>
+                                <DependencyConvergence />
+                            </rules>
+                        </configuration>
+                        <goals>
+                            <goal>enforce</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <profiles>
+        <profile>
+            <id>dev</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-shade-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>none</phase>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
+</project>

dropwizard-e2e/src/main/java/com/example/app1/App1.java

@@ -0,0 +1,26 @@
+package com.example.app1;
+
+import io.dropwizard.Application;
+import io.dropwizard.Configuration;
+import io.dropwizard.jersey.optional.EmptyOptionalException;
+import io.dropwizard.jersey.optional.EmptyOptionalExceptionMapper;
+import io.dropwizard.setup.Environment;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+
+public class App1 extends Application<Configuration> {
+    @Override
+    public void run(Configuration config, Environment env) throws Exception {
+        // Ensure that we can override the default 404 response on an
+        // empty optional and return a 204 instead
+        env.jersey().register(new ExceptionMapper<EmptyOptionalException>() {
+            @Override
+            public Response toResponse(EmptyOptionalException exception) {
+                return Response.noContent().build();
+            }
+        });
+
+        env.jersey().register(new App1Resource());
+    }
+}

dropwizard-e2e/src/main/java/com/example/app1/App1Resource.java

@@ -0,0 +1,14 @@
+package com.example.app1;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import java.util.OptionalInt;
+
+@Path("/")
+public class App1Resource {
+    @GET
+    @Path("empty-optional")
+    public OptionalInt emptyOptional() {
+        return OptionalInt.empty();
+    }
+}

dropwizard-e2e/src/test/java/com/example/app1/App1Test.java

@@ -0,0 +1,28 @@
+package com.example.app1;
+
+import io.dropwizard.Configuration;
+import io.dropwizard.client.JerseyClientBuilder;
+import io.dropwizard.testing.ResourceHelpers;
+import io.dropwizard.testing.junit.DropwizardAppRule;
+import org.junit.ClassRule;
+import org.junit.Test;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.core.Response;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class App1Test {
+    @ClassRule
+    public static final DropwizardAppRule<Configuration> RULE =
+        new DropwizardAppRule<>(App1.class, ResourceHelpers.resourceFilePath("app1/config.yml"));
+
+    @Test
+    public void custom204OnEmptyOptional() {
+        final Client client = new JerseyClientBuilder(RULE.getEnvironment()).build("test client");
+        final String url = String.format("http://localhost:%d/empty-optional", RULE.getLocalPort());
+
+        final Response response = client.target(url).request().get();
+        assertThat(response.getStatus()).isEqualTo(204);
+    }
+}

dropwizard-e2e/src/test/resources/app1/config.yml

@@ -0,0 +1,7 @@
+server:
+  applicationConnectors:
+    - type: http
+      port: 0
+  adminConnectors:
+    - type: http
+      port: 0

pom.xml

@@ -50,6 +50,7 @@
         <module>dropwizard-benchmarks</module>
         <module>dropwizard-http2</module>
         <module>dropwizard-request-logging</module>
+        <module>dropwizard-e2e</module>
     </modules>
 
     <properties>