feat: add testcontainers

jpa/boot-hibernate2ndlevelcache-sample/pom.xml

@@ -135,6 +135,11 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-testcontainers</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.awaitility</groupId>
             <artifactId>awaitility</artifactId>

jpa/boot-hibernate2ndlevelcache-sample/src/test/java/com/example/hibernatecache/TestApplication.java

@@ -0,0 +1,15 @@
+package com.example.hibernatecache;
+
+import com.example.hibernatecache.common.TestContainersConfig;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.testcontainers.context.ImportTestcontainers;
+
+@TestConfiguration(proxyBeanMethods = false)
+@ImportTestcontainers(TestContainersConfig.class)
+class TestApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.from(Application::main).with(TestApplication.class).run(args);
+    }
+}

jpa/boot-hibernate2ndlevelcache-sample/src/test/java/com/example/hibernatecache/common/TestContainersConfig.java

@@ -0,0 +1,10 @@
+package com.example.hibernatecache.common;
+
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.testcontainers.containers.PostgreSQLContainer;
+
+public interface TestContainersConfig {
+
+    @ServiceConnection
+    PostgreSQLContainer<?> postgreSQLContainer = new PostgreSQLContainer<>("postgres:16.0-alpine");
+}

jpa/boot-hibernate2ndlevelcache-sample/src/test/java/com/example/hibernatecache/web/controllers/OrderControllerIT.java

@@ -122,7 +122,10 @@ void shouldReturn400WhenCreateNewOrderWithoutName() throws Exception {
                 .andExpect(jsonPath("$.violations[0].field", is("name")))
                 .andExpect(jsonPath("$.violations[0].message", is("Name cannot be blank")))
                 .andExpect(jsonPath("$.violations[1].field", is("price")))
-                .andExpect(jsonPath("$.violations[1].message", is("Value must be greater than or equal to 0.01")))
+                .andExpect(
+                        jsonPath(
+                                "$.violations[1].message",
+                                is("Value must be greater than or equal to 0.01")))
                 .andReturn();
     }