fix: modified to use path param when purchasing packs

Author: tintin010

src/main/java/com/renzzle/backend/domain/puzzle/training/api/TrainingController.java

@@ -119,10 +119,10 @@ public ApiResponse<GetPackPurchaseResponse> PurchaseTrainingPack(
     @Operation(summary = "Purchase Training Puzzle Answer", description = "Purchase Training Puzzle Answer")
     @PostMapping("/puzzle/{puzzleId}/answer")
     public ApiResponse<GetTrainingPuzzleAnswerResponse> PurchaseTrainingPuzzleAnswer(
-            @Valid @RequestBody PurchaseTrainingPuzzleAnswerRequest request,
+            @PathVariable Long puzzleId,
             @AuthenticationPrincipal UserDetailsImpl user
     ){
-        GetTrainingPuzzleAnswerResponse response = trainingService.purchaseTrainingPuzzleAnswer(user.getUser(), request);
+        GetTrainingPuzzleAnswerResponse response = trainingService.purchaseTrainingPuzzleAnswer(user.getUser(), puzzleId);
 
         return ApiUtils.success(response);
     }

src/main/java/com/renzzle/backend/domain/puzzle/training/service/TrainingService.java

@@ -293,10 +293,10 @@ public GetPackPurchaseResponse purchaseTrainingPack(UserEntity user, PurchaseTra
     }
 
     @Transactional
-    public GetTrainingPuzzleAnswerResponse purchaseTrainingPuzzleAnswer(UserEntity user, PurchaseTrainingPuzzleAnswerRequest request) {
+    public GetTrainingPuzzleAnswerResponse purchaseTrainingPuzzleAnswer(UserEntity user, Long puzzleId) {
         UserEntity newUser = userRepository.findById(user.getId())
                 .orElseThrow(() -> new CustomException(ErrorCode.CANNOT_FIND_USER));
-        TrainingPuzzle puzzle = trainingPuzzleRepository.findById(request.puzzleId())
+        TrainingPuzzle puzzle = trainingPuzzleRepository.findById(puzzleId)
                 .orElseThrow(() -> new CustomException(ErrorCode.CANNOT_FIND_TRAINING_PUZZLE));
 
         newUser.purchase(ItemPrice.HINT.getPrice());

src/test/java/com/renzzle/backend/domain/puzzle/rank/service/RankServiceTest.java

@@ -313,6 +313,7 @@ void endRankGame_WhenValidSession_ThenDeletesSessionAndReturnsRating() {
         RankSessionData session = new RankSessionData();
         session.setStarted(true);
 
+         when(userRepository.findById(user.getId())).thenReturn(Optional.of(user));
         when(valueOperations.get("3")).thenReturn(session);
         when(userRepository.findById(user.getId())).thenReturn(Optional.of(user)); // 추가: userRepository Mock
         when(latestRankPuzzleRepository.findAllByUser(user))

src/test/java/com/renzzle/backend/domain/puzzle/training/service/TrainingServiceTest.java

@@ -531,10 +531,10 @@ public void testPurchaseTrainingPuzzleAnswer() {
             when(userRepository.findById(eq(user.getId())))
                     .thenReturn(Optional.of(user));
 
-            PurchaseTrainingPuzzleAnswerRequest request = new PurchaseTrainingPuzzleAnswerRequest(puzzleId);
+//            PurchaseTrainingPuzzleAnswerRequest request = new PurchaseTrainingPuzzleAnswerRequest(puzzleId);
 
             // when
-            GetTrainingPuzzleAnswerResponse response = trainingService.purchaseTrainingPuzzleAnswer(user, request);
+            GetTrainingPuzzleAnswerResponse response = trainingService.purchaseTrainingPuzzleAnswer(user, puzzleId);
 
             // then
             assertThat(response.answer()).isEqualTo("Correct Answer");
@@ -787,7 +787,7 @@ public void testPurchaseTrainingPuzzleAnswer_CannotPurchasePuzzle() {
                     .deletedAt(Instant.now().plus(1, ChronoUnit.DAYS))
                     .status(Status.getDefaultStatus())
                     .build();
-            PurchaseTrainingPuzzleAnswerRequest request = new PurchaseTrainingPuzzleAnswerRequest(puzzleId);
+//            PurchaseTrainingPuzzleAnswerRequest request = new PurchaseTrainingPuzzleAnswerRequest(puzzleId);
 
             when(trainingPuzzleRepository.findById(eq(puzzleId)))
                     .thenReturn(Optional.empty());
@@ -797,7 +797,7 @@ public void testPurchaseTrainingPuzzleAnswer_CannotPurchasePuzzle() {
 
             // when
             CustomException exception = assertThrows(CustomException.class, () ->
-                    trainingService.purchaseTrainingPuzzleAnswer(user, request)
+                    trainingService.purchaseTrainingPuzzleAnswer(user, puzzleId)
             );
 
             // then