Add Cloud OpenFeign tests

See gh-174

ci/smoke-tests.yml

@@ -113,6 +113,9 @@ groups:
      - name: cloud-loadbalancing-webflux
        app_test: true
        test: false
+     - name: cloud-openfeign
+       app_test: true
+       test: false
      - name: cloud-stream-kafka
        app_test: true
        test: false

cloud/cloud-openfeign/build.gradle

@@ -0,0 +1,29 @@
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+    id 'java'
+    id 'org.springframework.boot'
+    id 'org.springframework.aot.smoke-test'
+    id 'org.graalvm.buildtools.native'
+}
+
+ext {
+    set('springCloudVersion', "2022.0.2-SNAPSHOT")
+}
+
+dependencies {
+    implementation(platform(SpringBootPlugin.BOM_COORDINATES))
+    implementation(platform("org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"))
+    implementation("org.springframework.cloud:spring-cloud-starter-openfeign")
+    implementation("org.springframework.cloud:spring-cloud-starter-loadbalancer")
+    implementation ('org.springframework.boot:spring-boot-starter-web')
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+
+    appTestImplementation(project(":aot-smoke-test-support"))
+    appTestImplementation("org.awaitility:awaitility:4.2.0")
+}
+
+aotSmokeTest {
+    webApplication = true
+}

cloud/cloud-openfeign/docker-compose.yml

@@ -0,0 +1,6 @@
+version: '3'
+services:
+  test-service:
+    image: springcloud/test-service:latest
+    ports:
+      - "8081"

cloud/cloud-openfeign/src/appTest/java/com/example/cloud/openfeign/CloudOpenFeignApplicationAotTests.java

@@ -0,0 +1,28 @@
+package com.example.cloud.openfeign;
+
+import java.time.Duration;
+
+import org.awaitility.Awaitility;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.smoketest.support.assertj.AssertableOutput;
+import org.springframework.aot.smoketest.support.junit.ApplicationTest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ApplicationTest
+class CloudOpenFeignApplicationAotTests {
+
+	@Test
+	void shouldCallTestService(AssertableOutput output) {
+		Awaitility.await().atMost(Duration.ofSeconds(30)).untilAsserted(() -> {
+			assertThat(output).hasLineContaining("c.e.c.o.CloudOpenFeignApplication        : test");
+			assertThat(output).hasLineContaining("c.e.c.o.CloudOpenFeignApplication        : test type hints");
+			// verify custom config with Logger.Level.FULL loaded
+			assertThat(output).hasLineContaining("---> POST http://test-service/test HTTP/1.1");
+			assertThat(output).hasNoLinesContaining("ERROR");
+		});
+
+	}
+
+}

cloud/cloud-openfeign/src/main/java/com/example/cloud/openfeign/CloudOpenFeignApplication.java

@@ -0,0 +1,95 @@
+package com.example.cloud.openfeign;
+
+import com.example.cloud.openfeign.config.CustomFeignConfig;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
+@SpringBootApplication
+@EnableFeignClients(clients = TestServiceClient.class)
+public class CloudOpenFeignApplication implements CommandLineRunner {
+
+	private static final Log LOG = LogFactory.getLog(CloudOpenFeignApplication.class);
+
+	@Autowired
+	private TestServiceClient testServiceClient;
+
+	public static void main(String[] args) {
+		SpringApplication.run(CloudOpenFeignApplication.class, args);
+	}
+
+	@Override
+	public void run(String... args) {
+		callTestService();
+	}
+
+	private void callTestService() {
+		if (LOG.isInfoEnabled()) {
+			LOG.info(testServiceClient.test());
+			LOG.info(testServiceClient.testTypesForReflection(new TestArgType("test type hints")).getTest());
+		}
+	}
+
+}
+
+@FeignClient(value = "test-service", configuration = CustomFeignConfig.class)
+interface TestServiceClient {
+
+	@GetMapping("/")
+	String test();
+
+	@PostMapping(value = "/test", produces = "application/json", consumes = "application/json")
+	TestReturnType testTypesForReflection(@RequestBody TestArgType testArg);
+
+}
+
+class TestReturnType {
+
+	private String test;
+
+	public TestReturnType(String test) {
+		this.test = test;
+	}
+
+	public TestReturnType() {
+	}
+
+	public String getTest() {
+		return test;
+	}
+
+	public void setTest(String test) {
+		this.test = test;
+	}
+
+}
+
+class TestArgType {
+
+	private String test;
+
+	public TestArgType(String test) {
+		this.test = test;
+	}
+
+	public TestArgType() {
+	}
+
+	public String getTest() {
+		return test;
+	}
+
+	public void setTest(String test) {
+		this.test = test;
+	}
+
+}

cloud/cloud-openfeign/src/main/java/com/example/cloud/openfeign/config/CustomFeignConfig.java

@@ -0,0 +1,14 @@
+package com.example.cloud.openfeign.config;
+
+import feign.Logger;
+
+import org.springframework.context.annotation.Bean;
+
+public class CustomFeignConfig {
+
+	@Bean
+	Logger.Level loggingLevel() {
+		return Logger.Level.FULL;
+	}
+
+}

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

@@ -0,0 +1,19 @@
+logging:
+  level:
+    com.example.cloud.openfeign.TestServiceClient: DEBUG
+spring:
+  application:
+    name: cloud-openfeign
+  cloud:
+    discovery:
+      client:
+        simple:
+          instances:
+            test-service:
+              - uri: http://${TEST-SERVICE_HOST:localhost}:${TEST-SERVICE_PORT_8081:8081}
+    refresh:
+      enabled: false
+    loadbalancer:
+      eager-load:
+        clients:
+          - test-service