chore: mysql 컨테이너 기다리게 수정

Author: sapiens2000

.github/workflows/dev-build.yml

@@ -1,4 +1,4 @@
-name: log4u-dev-build
+name: dev-build
 on:
   pull_request:
     branches:
@@ -46,6 +46,21 @@ jobs:
             -p 3307:3306 \
             mysql:8.0.33
 
+      - name: Wait for MySQL to be ready
+        run: |
+          for i in {1..10}; do
+            if docker exec log4u-mysql mysqladmin ping -h "127.0.0.1" --silent; then
+              echo "MySQL is ready!"
+              break
+            fi
+            echo "Waiting for MySQL to start..."
+            sleep 1
+          done
+          if ! docker exec log4u-mysql mysqladmin ping -h "127.0.0.1" --silent; then
+            echo "MySQL did not start in time!"
+            exit 1
+          fi
+
       - name: Build and analyze
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

src/test/java/com/example/log4u/domain/follow/FollowTest.java

@@ -69,10 +69,10 @@ void createFollowFailureWithUserNotFound() {
 			.isPremium(false)
 			.build();
 
-		userRepository.save(user);
+		final Long userId = userRepository.save(user).getUserId();
 
 		assertThrows(UserNotFoundException.class,
-			() -> followService.createFollow(user.getUserId(), WRONG_TARGET));
+			() -> followService.createFollow(userId, WRONG_TARGET));
 	}
 
 	@Test