[BE] test: 테스트 환경을 MySQL로 통일하기 위해 TestContainers 도입

backend/build.gradle

@@ -49,6 +49,9 @@ dependencies {
     testImplementation 'org.springframework.restdocs:spring-restdocs-mockmvc:3.0.1'
     testImplementation 'io.rest-assured:spring-mock-mvc:5.4.0'
     testImplementation 'io.rest-assured:rest-assured:5.4.0'
+
+    // TestContainers
+    testImplementation 'org.testcontainers:mysql:1.20.2'
 }
 
 ext {

backend/src/test/java/reviewme/support/DatabaseCleaner.java

@@ -13,7 +13,7 @@
 public class DatabaseCleaner {
 
     private static final String TRUNCATE_FORMAT = "TRUNCATE TABLE %s";
-    private static final String ALTER_FORMAT = "ALTER TABLE %s ALTER COLUMN ID RESTART WITH 1";
+    private static final String ALTER_FORMAT = "ALTER TABLE %s AUTO_INCREMENT = 1";
 
     @PersistenceContext
     private EntityManager entityManager;
@@ -32,11 +32,11 @@ public void afterPropertiesSet() {
     @Transactional
     public void execute() {
         entityManager.flush();
-        entityManager.createNativeQuery("SET REFERENTIAL_INTEGRITY FALSE").executeUpdate();
+        entityManager.createNativeQuery("SET FOREIGN_KEY_CHECKS = 0").executeUpdate();
         for (String tableName : tableNames) {
             entityManager.createNativeQuery(TRUNCATE_FORMAT.formatted(tableName)).executeUpdate();
             entityManager.createNativeQuery(ALTER_FORMAT.formatted(tableName)).executeUpdate();
         }
-        entityManager.createNativeQuery("SET REFERENTIAL_INTEGRITY TRUE").executeUpdate();
+        entityManager.createNativeQuery("SET FOREIGN_KEY_CHECKS = 1").executeUpdate();
     }
 }

backend/src/test/java/reviewme/support/ServiceTest.java

@@ -7,11 +7,10 @@
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import reviewme.config.TestConfig;
 
 @Target(ElementType.TYPE)
 @Retention(RetentionPolicy.RUNTIME)
-@SpringBootTest(webEnvironment = WebEnvironment.NONE, classes = TestConfig.class)
+@SpringBootTest(webEnvironment = WebEnvironment.NONE, classes = TestDatabaseConfig.class)
 @ExtendWith(DatabaseCleanerExtension.class)
 public @interface ServiceTest {
 }

backend/src/test/java/reviewme/support/TestDatabaseConfig.java

@@ -0,0 +1,36 @@
+package reviewme.support;
+
+import javax.sql.DataSource;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Primary;
+import org.testcontainers.containers.JdbcDatabaseContainer;
+import org.testcontainers.containers.MySQLContainer;
+
+@TestConfiguration
+public class TestDatabaseConfig {
+
+    private static final String IMAGE_NAME = "mysql:8.0.39";
+    private static final JdbcDatabaseContainer<?> container = new MySQLContainer<>(IMAGE_NAME);
+
+    static {
+        container.start();
+    }
+
+    @Bean
+    @Primary
+    public static DataSource getDataSource() {
+        return DataSourceBuilder.create()
+                .url(container.getJdbcUrl())
+                .username(container.getUsername())
+                .password(container.getPassword())
+                .driverClassName(container.getDriverClassName())
+                .build();
+    }
+
+    @Bean
+    public DatabaseCleaner databaseCleaner() {
+        return new DatabaseCleaner();
+    }
+}

backend/src/test/resources/application.yml

@@ -1,8 +1,4 @@
 spring:
-  datasource:
-    url: jdbc:h2:mem:test
-    username: sa
-    password:
   h2:
     console:
       enabled: true