test: MemberUtil 테스트 코드 추가 (#98)

* test: MemberUtil 테스트 코드 추가

* refactor: MockitoExtension

src/test/java/com/depromeet/stonebed/global/util/MemberUtilTest.java

@@ -0,0 +1,160 @@
+package com.depromeet.stonebed.global.util;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import com.depromeet.stonebed.domain.member.dao.MemberRepository;
+import com.depromeet.stonebed.domain.member.domain.Member;
+import com.depromeet.stonebed.domain.member.dto.request.NicknameCheckRequest;
+import com.depromeet.stonebed.global.error.ErrorCode;
+import com.depromeet.stonebed.global.error.exception.CustomException;
+import com.navercorp.fixturemonkey.FixtureMonkey;
+import com.navercorp.fixturemonkey.api.introspector.FieldReflectionArbitraryIntrospector;
+import java.util.Optional;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.test.context.ActiveProfiles;
+
+@ActiveProfiles("test")
+@ExtendWith(MockitoExtension.class)
+class MemberUtilTest {
+
+    @InjectMocks private MemberUtil memberUtil;
+
+    @Mock private SecurityUtil securityUtil;
+
+    @Mock private MemberRepository memberRepository;
+
+    private FixtureMonkey fixtureMonkey;
+
+    @BeforeEach
+    void setUp() {
+        fixtureMonkey =
+                FixtureMonkey.builder()
+                        .objectIntrospector(FieldReflectionArbitraryIntrospector.INSTANCE)
+                        .defaultNotNull(true)
+                        .build();
+    }
+
+    @Test
+    void getCurrentMember_성공() {
+        // given
+        Member member = fixtureMonkey.giveMeOne(Member.class);
+        when(securityUtil.getCurrentMemberId()).thenReturn(member.getId());
+        when(memberRepository.findById(member.getId())).thenReturn(Optional.of(member));
+
+        // when
+        Member result = memberUtil.getCurrentMember();
+
+        // then
+        assertNotNull(result);
+        assertEquals(member.getId(), result.getId());
+    }
+
+    @Test
+    void getCurrentMember_실패_MEMBER_NOT_FOUND() {
+        // given
+        Long memberId = fixtureMonkey.giveMeOne(Long.class);
+        when(securityUtil.getCurrentMemberId()).thenReturn(memberId);
+        when(memberRepository.findById(memberId)).thenReturn(Optional.empty());
+
+        // when & then
+        CustomException exception =
+                assertThrows(CustomException.class, () -> memberUtil.getCurrentMember());
+        assertEquals(ErrorCode.MEMBER_NOT_FOUND, exception.getErrorCode());
+    }
+
+    @Test
+    void getMemberByMemberId_성공() {
+        // given
+        Member member = fixtureMonkey.giveMeOne(Member.class);
+        when(memberRepository.findById(member.getId())).thenReturn(Optional.of(member));
+
+        // when
+        Member result = memberUtil.getMemberByMemberId(member.getId());
+
+        // then
+        assertNotNull(result);
+        assertEquals(member.getId(), result.getId());
+    }
+
+    @Test
+    void getMemberByMemberId_실패_MEMBER_NOT_FOUND() {
+        // given
+        Long memberId = fixtureMonkey.giveMeOne(Long.class);
+        when(memberRepository.findById(memberId)).thenReturn(Optional.empty());
+
+        // when & then
+        CustomException exception =
+                assertThrows(CustomException.class, () -> memberUtil.getMemberByMemberId(memberId));
+        assertEquals(ErrorCode.MEMBER_NOT_FOUND, exception.getErrorCode());
+    }
+
+    @Test
+    void getMemberRole_성공() {
+        // given
+        String role = fixtureMonkey.giveMeOne(String.class);
+        when(securityUtil.getCurrentMemberRole()).thenReturn(role);
+
+        // when
+        String result = memberUtil.getMemberRole();
+
+        // then
+        assertNotNull(result);
+        assertEquals(role, result);
+    }
+
+    @Test
+    void checkNickname_성공() {
+        // given
+        String nickname = "validNickname";
+        NicknameCheckRequest request = new NicknameCheckRequest(nickname);
+        when(memberRepository.existsByProfileNickname(nickname)).thenReturn(false);
+
+        // when & then
+        assertDoesNotThrow(() -> memberUtil.checkNickname(request));
+    }
+
+    @Test
+    void checkNickname_실패_MEMBER_ALREADY_NICKNAME() {
+        // given
+        String nickname = "duplicateNickname";
+        NicknameCheckRequest request = new NicknameCheckRequest(nickname);
+        when(memberRepository.existsByProfileNickname(nickname)).thenReturn(true);
+
+        // when & then
+        CustomException exception =
+                assertThrows(CustomException.class, () -> memberUtil.checkNickname(request));
+        assertEquals(ErrorCode.MEMBER_ALREADY_NICKNAME, exception.getErrorCode());
+    }
+
+    @Test
+    void checkNickname_실패_MEMBER_INVALID_NICKNAME_길이_1() {
+        // given
+        String nickname = "a";
+        NicknameCheckRequest request = new NicknameCheckRequest(nickname);
+        when(memberRepository.existsByProfileNickname(nickname)).thenReturn(false);
+
+        // when & then
+        CustomException exception =
+                assertThrows(CustomException.class, () -> memberUtil.checkNickname(request));
+        assertEquals(ErrorCode.MEMBER_INVALID_NICKNAME, exception.getErrorCode());
+    }
+
+    @Test
+    void checkNickname_실패_MEMBER_INVALID_NICKNAME_길이_15() {
+        // given
+        String nickname = "a".repeat(15);
+        NicknameCheckRequest request = new NicknameCheckRequest(nickname);
+        when(memberRepository.existsByProfileNickname(nickname)).thenReturn(false);
+
+        // when & then
+        CustomException exception =
+                assertThrows(CustomException.class, () -> memberUtil.checkNickname(request));
+        assertEquals(ErrorCode.MEMBER_INVALID_NICKNAME, exception.getErrorCode());
+    }
+}