HotFix: 로그아웃 시 멤버가 없으면 로그아웃 안되는 에러 해결 (#178)

fix: 멤버가 탈퇴한 경우에도 로그아웃 가능하도록 수정

src/main/java/com/example/sinitto/member/service/MemberService.java

@@ -88,7 +88,11 @@ public RegisterResponse registerNewMember(String name, String phoneNumber, Strin
 
     public void memberLogout(Long memberId) {
         Member member = memberRepository.findById(memberId)
-                .orElseThrow(() -> new NotFoundException("id에 해당하는 멤버가 없습니다."));
+                .orElseThrow(null);
+
+        if (member == null) {
+            return;
+        }
 
         String storedRefreshToken = (String) redisTemplate.opsForHash().get(member.getEmail(), "refreshToken");
 

src/test/java/com/example/sinitto/member/service/MemberServiceTest.java

@@ -138,7 +138,7 @@ void memberLogoutTestWhenMemberIsNull() {
         when(memberRepository.findById(memberId)).thenReturn(Optional.empty());
 
         //when, then
-        assertThrows(NotFoundException.class, () -> memberService.memberLogout(memberId));
+        assertThrows(NullPointerException.class, () -> memberService.memberLogout(memberId));
     }
 
     @Test