test : Member Service 테스트 작성 (#53)

* 회원가입 테스트 작성

src/test/java/LeejuButU/BidCycle/member/service/MemberSeviceTest.java

@@ -0,0 +1,55 @@
+package LeejuButU.BidCycle.member.service;
+
+import LeejuButU.BidCycle.domain.member.domain.Member;
+import LeejuButU.BidCycle.domain.member.repository.MemberRepository;
+import LeejuButU.BidCycle.domain.member.service.MemberService;
+import LeejuButU.BidCycle.fixture.Fixture;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+public class MemberSeviceTest {
+
+    @Mock
+    private MemberRepository memberRepository;
+
+    private Member member;
+
+    @InjectMocks
+    private MemberService memberService;
+
+    @BeforeEach
+    void setUp() {
+        member = Fixture.generateMember("leeju");
+    }
+
+    @Test
+    @DisplayName("회원 가입 테스트")
+    public void joinTest(){
+
+        //given
+        when(memberRepository.existsById(anyLong())).thenReturn(false);
+        when(memberRepository.save(any())).thenReturn(member);
+
+        //when
+        Long memberId = memberService.join(member);
+
+        //then
+        verify(memberRepository, times(1)).save(member);
+    }
+
+}