Add Cloud Gateway smoke tests

See gh-149

ci/smoke-tests.yml

@@ -32,6 +32,7 @@ groups:
     - cloud-discovery-consul
     - cloud-discovery-eureka
     - cloud-discovery-zookeeper
+    - cloud-gateway
     - cloud-function-web
     - cloud-function-webflux
     - cloud-loadbalancing-web

cloud/cloud-gateway/build.gradle

@@ -0,0 +1,30 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot'
+    id 'org.springframework.aot.smoke-test'
+    id 'org.graalvm.buildtools.native'
+}
+
+ext {
+    set('springCloudVersion', "2022.0.0-SNAPSHOT")
+}
+
+dependencies {
+    implementation(platform(
+            org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES))
+    implementation(
+            platform("org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"))
+    implementation("org.springframework.boot:spring-boot-starter")
+    implementation("org.springframework.cloud:spring-cloud-starter-gateway")
+    implementation("org.springframework.cloud:spring-cloud-starter-loadbalancer")
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+
+    appTestImplementation(project(":aot-smoke-test-support"))
+
+}
+
+aotSmokeTest {
+    webApplication = true
+}
+

cloud/cloud-gateway/docker-compose.yml

@@ -0,0 +1,10 @@
+version: '3'
+services:
+  test-service:
+    image: springcloud/test-service:latest
+    ports:
+      - "8081"
+  demo-service:
+    image: springcloud/demo-service:latest
+    ports:
+      - "8082"

cloud/cloud-gateway/src/appTest/java/com/example/cloud/gateway/CloudGatewayApplicationAotTests.java

@@ -0,0 +1,21 @@
+package com.example.cloud.gateway;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.smoketest.support.junit.ApplicationTest;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ApplicationTest
+public class CloudGatewayApplicationAotTests {
+
+	@Test
+	void shouldRouteRequests(WebTestClient client) {
+		client.get().uri("test-service").exchange().expectStatus().isOk().expectBody()
+				.consumeWith((result) -> assertThat(new String(result.getResponseBodyContent())).isEqualTo("test"));
+		client.get().uri("demo-service").exchange().expectStatus().isOk().expectBody()
+				.consumeWith((result) -> assertThat(new String(result.getResponseBodyContent())).isEqualTo("demo"));
+	}
+
+}

cloud/cloud-gateway/src/main/java/org/example/cloud/gateway/CloudGatewayApplication.java

@@ -0,0 +1,13 @@
+package org.example.cloud.gateway;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CloudGatewayApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(CloudGatewayApplication.class, args);
+	}
+
+}

cloud/cloud-gateway/src/main/java/org/example/cloud/gateway/RoutesConfig.java

@@ -0,0 +1,20 @@
+package org.example.cloud.gateway;
+
+import org.springframework.cloud.gateway.route.RouteLocator;
+import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+
+@Configuration
+class RoutesConfig {
+
+	@Bean
+	RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
+		return builder
+				.routes().route("demo_service_route", route -> route.path("/demo-service/**").and()
+						.method(HttpMethod.GET).filters(filter -> filter.stripPrefix(1)).uri("lb://demo-service"))
+				.build();
+	}
+
+}

cloud/cloud-gateway/src/main/resources/application.yml

@@ -0,0 +1,31 @@
+logging:
+  level:
+    org.springframework.cloud: DEBUG
+spring:
+  application:
+    name: gateway
+  cloud:
+    discovery:
+      client:
+        simple:
+            instances:
+              test-service:
+                - uri: http://${TEST-SERVICE_HOST:localhost}:${TEST-SERVICE_PORT_8081:8081}
+              demo-service:
+                - uri: http://${DEMO-SERVICE_HOST:localhost}:${DEMO-SERVICE_PORT_8082:8082}
+    loadbalancer:
+      eager-load:
+        clients:
+          - demo-service
+          - test-service
+    gateway:
+      routes:
+        - id: test_service_route
+          uri: lb://test-service
+          predicates:
+            - Path=/test-service/**
+          filters:
+            - StripPrefix=1
+            - name: Retry
+              args:
+                retries: 3