Issue: (#85) MY_02 (기능보완) 커플 생년월일 조회 기능

src/main/kotlin/gomushin/backend/couple/dto/response/CoupleBirthDayResponse.kt

@@ -0,0 +1,19 @@
+package gomushin.backend.couple.dto.response
+
+import gomushin.backend.member.domain.entity.Member
+import io.swagger.v3.oas.annotations.media.Schema
+import java.time.LocalDate
+
+data class CoupleBirthDayResponse (
+    @Schema(description = "커플 생년월일", example = "2001-04-01")
+    val partnerBirthday : LocalDate?,
+    @Schema(description = "내 생년월일", example = "2001-03-01")
+    val myBirthDay : LocalDate?
+) {
+    companion object {
+        fun of(coupleMember : Member, myMember : Member) = CoupleBirthDayResponse(
+            coupleMember.birthDate,
+            myMember.birthDate
+        )
+    }
+}

src/main/kotlin/gomushin/backend/couple/facade/CoupleFacade.kt

@@ -130,4 +130,10 @@ class CoupleFacade(
             throw BadRequestException("sarangggun.couple.already-init")
         }
     }
+
+    fun getCoupleBirthDay(customUserDetails: CustomUserDetails): CoupleBirthDayResponse {
+        val couple = coupleInfoService.findCoupleMember(customUserDetails.getId())
+        val member = memberService.getById(customUserDetails.getId())
+        return CoupleBirthDayResponse.of(couple, member)
+    }
 }

src/main/kotlin/gomushin/backend/couple/presentation/ApiPath.kt

@@ -16,4 +16,5 @@ object ApiPath {
     const val ANNIVERSARY_GENERATE = "/v1/couple/new-anniversary"
     const val ANNIVERSARY_MAIN = "/v1/anniversary/main"
     const val ANNIVERSARIES = "/v1/anniversaries"
+    const val COUPLE_BIRTHDAY = "/v1/couple/birthday"
 }

src/main/kotlin/gomushin/backend/couple/presentation/CoupleInfoController.kt

@@ -71,4 +71,14 @@ class CoupleInfoController (
     ):ApiResponse<CoupleEmotionResponse>{
         return ApiResponse.success(coupleFacade.getCoupleEmotion(customUserDetails))
     }
+
+    @ResponseStatus(HttpStatus.OK)
+    @GetMapping(ApiPath.COUPLE_BIRTHDAY)
+    @Operation(summary = "커플 생년월일 조회 api", description = "getCoupleBirthDay")
+    fun getCoupleBirthDay(
+        @AuthenticationPrincipal customUserDetails: CustomUserDetails
+    ) :ApiResponse<CoupleBirthDayResponse>{
+        val coupleBirthDay = coupleFacade.getCoupleBirthDay(customUserDetails)
+        return ApiResponse.success(coupleBirthDay)
+    }
 }

src/test/kotlin/gomushin/backend/couple/facade/CoupleFacadeTest.kt

@@ -62,7 +62,7 @@ class CoupleFacadeTest {
                 name = "곰신",
                 nickname = "곰신닉네임",
                 email = "[email protected]",
-                birthDate = null,
+                birthDate = LocalDate.of(2001, 3, 1),
                 profileImageUrl = null,
                 provider = Provider.KAKAO,
                 role = Role.MEMBER,
@@ -73,7 +73,7 @@ class CoupleFacadeTest {
                 name = "꽃신",
                 nickname = "꽃신닉네임",
                 email = "[email protected]",
-                birthDate = null,
+                birthDate = LocalDate.of(2001, 4, 1),
                 profileImageUrl = null,
                 provider = Provider.KAKAO,
                 role = Role.MEMBER,
@@ -206,4 +206,18 @@ class CoupleFacadeTest {
         //then
         verify(anniversaryService).generateAnniversary(couple, generateAnniversaryRequest)
     }
+
+    @DisplayName("생년월일 조회 - 정상응답")
+    @Test
+    fun getCoupleBirthDay() {
+        //given
+        `when`(memberService.getById(customUserDetails.getId())).thenReturn(member1)
+        `when`(coupleInfoService.findCoupleMember(customUserDetails.getId())).thenReturn(member2)
+        //when
+        val result = coupleFacade.getCoupleBirthDay(customUserDetails)
+        //then
+        verify(coupleInfoService).findCoupleMember(customUserDetails.getId())
+        assertEquals(result.myBirthDay, member1.birthDate)
+        assertEquals(result.partnerBirthday, member2.birthDate)
+    }
 }