test: flyway 스크립트를 검증하는 테스트 코드 작성

src/test/java/com/example/solidconnection/database/FlywayMigrationTest.java

@@ -0,0 +1,47 @@
+package com.example.solidconnection.database;
+
+import com.example.solidconnection.support.RedisTestContainer;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
+import org.testcontainers.containers.MySQLContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+
+@SpringBootTest
+@Testcontainers
+@ContextConfiguration(initializers = {RedisTestContainer.class, FlywayMigrationTest.FlywayMySQLInitializer.class})
+@TestPropertySource(properties = {
+        "spring.flyway.enabled=true",
+        "spring.flyway.baseline-on-migrate=true",
+        "spring.jpa.hibernate.ddl-auto=validate"
+})
+class FlywayMigrationTest {
+
+    @Container
+    private static final MySQLContainer<?> MYSQL = new MySQLContainer<>("mysql:8.0")
+            .withDatabaseName("flyway_test")
+            .withUsername("flyway_user")
+            .withPassword("flyway_password");
+
+    static class FlywayMySQLInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+        @Override
+        public void initialize(ConfigurableApplicationContext ctx) {
+            TestPropertyValues.of(
+                    "spring.datasource.url=" + MYSQL.getJdbcUrl(),
+                    "spring.datasource.username=" + MYSQL.getUsername(),
+                    "spring.datasource.password=" + MYSQL.getPassword()
+            ).applyTo(ctx.getEnvironment());
+        }
+    }
+
+    @Test
+    void flyway_스크립트가_정상적으로_수행되는지_확인한다() {
+        // Spring Boot 컨텍스트가 정상적으로 시작되면
+        // Flyway 마이그레이션과 ddl-auto=validate 검증이 성공한 것
+    }
+}