Integration tests like in Maven Template

Author: Брахин Борис

.gitignore

@@ -11,3 +11,4 @@ bin
 .factorypath
 .settings
 logs
+.idea/

src/main/g8/build.sbt

@@ -52,6 +52,18 @@ lazy val `$name;format="norm"$-stream-impl` = (project in file("$name;format="no
   )
   .dependsOn(`$name;format="norm"$-stream-api`, `$name;format="norm"$-api`)
 
+lazy val `integration-tests` = (project in file("integration-tests"))
+  .enablePlugins(LagomJava)
+  .settings(common)
+  .settings(
+    libraryDependencies ++= Seq(
+      lagomJavadslApi,
+      lagomJavadslIntegrationClient,
+      lagomLogback
+    )
+  )
+  .dependsOn(`$name;format="norm"$-stream-api`, `$name;format="norm"$-api`)
+
 val lombok = "org.projectlombok" % "lombok" % "1.18.8"
 
 def common = Seq(

src/main/g8/integration-tests/src/test/java/$package$/it/$name__Camel$StreamIT.java

@@ -0,0 +1,75 @@
+package $package$.it;
+
+import akka.actor.ActorSystem;
+import akka.stream.javadsl.Sink;
+import akka.stream.javadsl.Source;
+import com.lightbend.lagom.javadsl.client.integration.LagomClientFactory;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import $package$stream.api.$name;format="Camel"$StreamService;
+import $package$.api.GreetingMessage;
+import $package$.api.$name;format="Camel"$Service;
+
+import java.net.URI;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.TimeUnit;
+
+import static org.junit.Assert.assertEquals;
+
+public class $name;format="Camel"$StreamIT {
+
+    private static final String SERVICE_LOCATOR_URI = "http://localhost:9008";
+
+    private static LagomClientFactory clientFactory;
+    private static $name;format="Camel"$Service $name;format="camel"$Service;
+    private static $name;format="Camel"$StreamService $name;format="camel"$streamService;
+    private static ActorSystem system;
+
+    @BeforeClass
+    public static void setup() {
+        clientFactory = LagomClientFactory.create("integration-test", $name;format="Camel"$StreamIT.class.getClassLoader());
+        // One of the clients can use the service locator, the other can use the service gateway, to test them both.
+        $name;format="camel"$Service = clientFactory.createDevClient($name;format="Camel"$Service.class, URI.create(SERVICE_LOCATOR_URI));
+        $name;format="camel"$streamService = clientFactory.createDevClient($name;format="Camel"$StreamService.class, URI.create(SERVICE_LOCATOR_URI));
+
+        system = ActorSystem.create();
+    }
+
+    @Test
+    public void helloWorld() throws Exception {
+        String answer = await($name;format="camel"$Service.hello("foo").invoke());
+        assertEquals("Hello, foo!", answer);
+        await($name;format="camel"$Service.useGreeting("bar").invoke(new GreetingMessage("Hi")));
+        String answer2 = await($name;format="camel"$Service.hello("bar").invoke());
+        assertEquals("Hi, bar!", answer2);
+    }
+
+    @Test
+    public void helloStream() throws Exception {
+        // Important to concat our source with a maybe, this ensures the connection doesn't get closed once we've
+        // finished feeding our elements in, and then also to take 3 from the response stream, this ensures our
+        // connection does get closed once we've received the 3 elements.
+        Source<String, ?> response = await($name;format="camel"$streamService.directStream().invoke(
+                Source.from(Arrays.asList("a", "b", "c"))
+                        .concat(Source.maybe())));
+        List<String> messages = await(response.take(3).runWith(Sink.seq(), system));
+        assertEquals(Arrays.asList("Hello, a!", "Hello, b!", "Hello, c!"), messages);
+    }
+
+    private <T> T await(CompletionStage<T> future) throws Exception {
+        return future.toCompletableFuture().get(10, TimeUnit.SECONDS);
+    }
+
+    @AfterClass
+    public static void tearDown() {
+        if (clientFactory != null) {
+            clientFactory.close();
+        }
+        if (system != null) {
+            system.terminate();
+        }
+    }
+}

src/main/g8/integration-tests/src/test/resources/application.conf

@@ -0,0 +1 @@
+# Because the client factory needs it

src/main/g8/integration-tests/src/test/resources/logback-test.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%date{ISO8601} %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+
+</configuration>