From: Kai Moritz <kai@juplo.de>
Date: Fri, 10 Jan 2020 19:07:51 +0000 (+0100)
Subject: Implemented a narrow integration-test: DemoApplicationIT
X-Git-Tag: wip-it~23
X-Git-Url: https://juplo.de/gitweb/?p=demos%2Ftesting;a=commitdiff_plain;h=a82d5bd5f72e69bf3ffc53f263595885dfa47a87

Implemented a narrow integration-test: DemoApplicationIT
---

diff --git a/pom.xml b/pom.xml
index 5ba398c..d2dffbf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,6 +16,8 @@
 
 	<properties>
 		<java.version>1.8</java.version>
+		<mockserver.version>5.8.1</mockserver.version>
+		<testcontainers-nginx.version>1.12.4</testcontainers-nginx.version>
 	</properties>
 
 	<dependencies>
@@ -39,6 +41,23 @@
 				</exclusion>
 			</exclusions>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mock-server</groupId>
+			<artifactId>mockserver-netty</artifactId>
+			<version>${mockserver.version}</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>nginx</artifactId>
+			<version>${testcontainers-nginx.version}</version>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>io.projectreactor</groupId>
 			<artifactId>reactor-test</artifactId>
@@ -58,6 +77,10 @@
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
 			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-failsafe-plugin</artifactId>
+			</plugin>
 		</plugins>
 	</build>
 
diff --git a/src/test/java/de/juplo/demo/DemoApplicationIT.java b/src/test/java/de/juplo/demo/DemoApplicationIT.java
new file mode 100644
index 0000000..039b4b6
--- /dev/null
+++ b/src/test/java/de/juplo/demo/DemoApplicationIT.java
@@ -0,0 +1,63 @@
+package de.juplo.demo;
+
+import java.net.URI;
+import org.junit.jupiter.api.Test;
+import static org.mockserver.matchers.Times.exactly;
+import static org.mockserver.model.HttpForward.forward;
+import static org.mockserver.model.HttpRequest.request;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+class DemoApplicationIT extends IntegrationTestBase
+{
+  @Autowired
+  MockMvc mockMvc;
+
+
+  @Test
+  void test() throws Exception
+  {
+    MOCK_SERVER
+        .when(request().withPath("/test.txt"), exactly(1))
+        .forward(forward()
+            .withHost(NGINX.getContainerIpAddress())
+            .withPort(NGINX.getMappedPort(80)));
+    mockMvc
+        .perform(get(URI.create("http://S.U.T/?path=test.txt")))
+        .andExpect(status().isOk())
+        .andExpect(content().contentType(MediaType.TEXT_PLAIN))
+        .andExpect(content().string("Hello World!\n"));
+  }
+
+  @Configuration
+  static class Application
+  {
+    @Bean
+    RemoteContentService service()
+    {
+      return new RemoteContentService(
+          WebClient
+              .builder()
+              .baseUrl("http://localhost:" +
+                  DemoApplicationIT.MOCK_SERVER.getLocalPort())
+              .build());
+    }
+
+    @Bean
+    HtmlController controller(RemoteContentService service)
+    {
+      return new HtmlController(service);
+    }
+  }
+}
diff --git a/src/test/java/de/juplo/demo/IntegrationTestBase.java b/src/test/java/de/juplo/demo/IntegrationTestBase.java
new file mode 100644
index 0000000..2135a6d
--- /dev/null
+++ b/src/test/java/de/juplo/demo/IntegrationTestBase.java
@@ -0,0 +1,51 @@
+package de.juplo.demo;
+
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.mockserver.integration.ClientAndServer;
+import org.testcontainers.containers.NginxContainer;
+import org.testcontainers.containers.wait.strategy.HttpWaitStrategy;
+
+
+
+/**
+ * This class starts a
+ * {@link https://www.testcontainers.org/modules/nginx/ NginX-Webserver}
+ * via a {@link https://www.testcontainers.org/ Testcontainer} and a
+ * standalone {@link http://www.mock-server.com/#what-is-mockserver MockServer},
+ * that can be used to intercept requests for assertions / verifications.
+ * <p>
+ * We use the {@link
+ * https://www.testcontainers.org/test_framework_integration/manual_lifecycle_control/#singleton-containers
+ * Singleton Pattern} to start the NginX-Testcontainer and start the MockServer
+ * programmatically via the {@link
+ * http://www.mock-server.com/mock_server/running_mock_server.html#client_api
+ * Client-API}.
+ * @author Kai Moritz
+ */
+public abstract class IntegrationTestBase
+{
+  static final NginxContainer NGINX;
+  static final ClientAndServer MOCK_SERVER;
+
+
+  static
+  {
+    NGINX = new NginxContainer().withCustomContent("src/test/resources/");
+    MOCK_SERVER = ClientAndServer.startClientAndServer();
+  }
+
+
+  @BeforeAll
+  static void startMockServer()
+  {
+    NGINX.waitingFor(new HttpWaitStrategy()).start();
+  }
+
+  @AfterAll
+  static void stopMockServer()
+  {
+    MOCK_SERVER.stop();
+  }
+}
diff --git a/src/test/resources/index.html b/src/test/resources/index.html
new file mode 100644
index 0000000..f747925
--- /dev/null
+++ b/src/test/resources/index.html
@@ -0,0 +1 @@
+DUMMY
diff --git a/src/test/resources/test.txt b/src/test/resources/test.txt
new file mode 100644
index 0000000..980a0d5
--- /dev/null
+++ b/src/test/resources/test.txt
@@ -0,0 +1 @@
+Hello World!