separate container configuration

jpa/boot-data-customsequence/src/test/java/com/example/custom/sequence/TestApplication.java

@@ -1,20 +1,14 @@
 package com.example.custom.sequence;
 
+import com.example.custom.sequence.common.ContainersConfig;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.test.context.TestConfiguration;
-import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
-import org.springframework.context.annotation.Bean;
-import org.testcontainers.containers.MariaDBContainer;
+import org.springframework.context.annotation.Import;
 
 @TestConfiguration(proxyBeanMethods = false)
+@Import(ContainersConfig.class)
 public class TestApplication {
 
-    @Bean
-    @ServiceConnection
-    MariaDBContainer<?> mariaDbContainer() {
-        return new MariaDBContainer<>("mariadb:11.4");
-    }
-
     public static void main(String[] args) {
         SpringApplication.from(Application::main).with(TestApplication.class).run(args);
     }

jpa/boot-data-customsequence/src/test/java/com/example/custom/sequence/common/ContainersConfig.java

@@ -0,0 +1,17 @@
+package com.example.custom.sequence.common;
+
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.springframework.context.annotation.Bean;
+import org.testcontainers.containers.MariaDBContainer;
+import org.testcontainers.utility.DockerImageName;
+
+@TestConfiguration(proxyBeanMethods = false)
+public class ContainersConfig {
+
+    @Bean
+    @ServiceConnection
+    MariaDBContainer<?> mariaDbContainer() {
+        return new MariaDBContainer<>(DockerImageName.parse("mariadb").withTag("11.4"));
+    }
+}