Add cache-simple smoke test

See gh-40

cache-simple/README.adoc

@@ -0,0 +1 @@
+Tests if caching with ConcurrentHashMap works

cache-simple/build.gradle

@@ -0,0 +1,16 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot'
+	id 'org.springframework.aot.smoke-test'
+	id 'org.graalvm.buildtools.native'
+}
+
+dependencies {
+	implementation(platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES))
+	implementation("org.springframework.boot:spring-boot-starter-cache")
+
+	testImplementation("org.springframework.boot:spring-boot-starter-test")
+
+	aotTestImplementation(project(":aot-smoke-test-support"))
+	aotTestImplementation("org.awaitility:awaitility:4.2.0")
+}

cache-simple/src/aotTest/java/com/example/cache/simple/CacheSimpleApplicationAotTests.java

@@ -0,0 +1,23 @@
+package com.example.cache.simple;
+
+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.AotSmokeTest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@AotSmokeTest
+class CacheSimpleApplicationAotTests {
+
+	@Test
+	void methodIsCached(AssertableOutput output) {
+		Awaitility.await().atMost(Duration.ofSeconds(10)).untilAsserted(() -> {
+			assertThat(output).hasSingleLineContaining("invoke: 1").hasNoLinesContaining("invoke: 2");
+		});
+	}
+
+}

cache-simple/src/main/java/com/example/cache/simple/CLR.java

@@ -0,0 +1,21 @@
+package com.example.cache.simple;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Component
+class CLR implements CommandLineRunner {
+
+	private final TestService testService;
+
+	public CLR(TestService testService) {
+		this.testService = testService;
+	}
+
+	@Override
+	public void run(String... args) {
+		this.testService.invoke();
+		this.testService.invoke();
+	}
+
+}

cache-simple/src/main/java/com/example/cache/simple/CacheConfiguration.java

@@ -0,0 +1,10 @@
+package com.example.cache.simple;
+
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration(proxyBeanMethods = false)
+@EnableCaching
+class CacheConfiguration {
+
+}

cache-simple/src/main/java/com/example/cache/simple/CacheSimpleApplication.java

@@ -0,0 +1,14 @@
+package com.example.cache.simple;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CacheSimpleApplication {
+
+	public static void main(String[] args) throws InterruptedException {
+		SpringApplication.run(CacheSimpleApplication.class, args);
+		Thread.currentThread().join(); // To be able to measure memory consumption
+	}
+
+}

cache-simple/src/main/java/com/example/cache/simple/TestService.java

@@ -0,0 +1,17 @@
+package com.example.cache.simple;
+
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Service;
+
+@Service
+class TestService {
+
+	private int counter = 1;
+
+	@Cacheable(cacheNames = "invoke")
+	public void invoke() {
+		System.out.printf("invoke: %d%n", this.counter);
+		this.counter++;
+	}
+
+}

cache-simple/src/test/java/com/example/cache/simple/CacheSimpleApplicationTests.java

@@ -0,0 +1,14 @@
+package com.example.cache.simple;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class CacheSimpleApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

ci/smoke-tests.yml

@@ -9,6 +9,7 @@ smoke_tests:
   - cache-cache2k
   - cache-caffeine
   - cache-hazelcast
+  - cache-simple
   - cloud-function-web
   - cloud-function-webflux
   - cloud-task

settings.gradle

@@ -37,6 +37,7 @@ include "batch"
 include "cache-cache2k"
 include "cache-caffeine"
 include "cache-hazelcast"
+include "cache-simple"
 include "cloud-function-web"
 include "cloud-function-webflux"
 include "cloud-task"