Fix: Mongo 저장 실패 시 update 롤백 - 정밀도 통일(밀리초) / em.clear 복원

Author: lunarbae628

src/test/java/io/ejangs/docsa/domain/save/app/SaveServiceIntegrationTest.java

@@ -136,7 +136,7 @@ void updateSave_fails_whenMongoSaveFails_thenMysqlDeleted() throws Exception {
 
             Save after = saveRepository.findById(save.getId()).orElse(null);
             assertThat(after).isNotNull();
-            assertThat(after.getUpdatedAt()).isEqualTo(beforeUpdatedAt);
+            assertThat(SaveServiceUtil.trimToMillis(after.getUpdatedAt())).isEqualTo(SaveServiceUtil.trimToMillis(beforeUpdatedAt));
         }
     }
 

src/test/java/io/ejangs/docsa/domain/save/util/SaveServiceUtil.java

@@ -60,4 +60,8 @@ public static Commit createCommit(Branch branch) {
                 .build();
     }
 
+    public static LocalDateTime trimToMillis(LocalDateTime t) {
+        return t.truncatedTo(ChronoUnit.MILLIS);
+    }
+
 }