feat: member 도메인에 Finder, Writer, Validator 추가 및 서비스 로직 수정

src/main/kotlin/roomescape/member/business/MemberService.kt

@@ -1,72 +1,52 @@
 package roomescape.member.business
 
-import com.github.f4b6a3.tsid.TsidFactory
 import io.github.oshai.kotlinlogging.KotlinLogging
-import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
-import roomescape.common.config.next
+import roomescape.member.implement.MemberFinder
-import roomescape.member.exception.MemberErrorCode
+import roomescape.member.implement.MemberWriter
-import roomescape.member.exception.MemberException
 import roomescape.member.infrastructure.persistence.MemberEntity
-import roomescape.member.infrastructure.persistence.MemberRepository
 import roomescape.member.infrastructure.persistence.Role
 import roomescape.member.web.*
 
 private val log = KotlinLogging.logger {}
 
 @Service
-@Transactional(readOnly = true)
 class MemberService(
-    private val tsidFactory: TsidFactory,
+    private val memberWriter: MemberWriter,
-    private val memberRepository: MemberRepository,
+    private val memberFinder: MemberFinder,
 ) {
+    @Transactional(readOnly = true)
     fun findMembers(): MemberRetrieveListResponse {
-        log.debug { "[MemberService.findMembers] 회원 조회 시작" }
+        log.info { "[MemberService.findMembers] 시작" }
 
-        return memberRepository.findAll()
+        return memberFinder.findAll()
-            .also { log.info { "[MemberService.findMembers] 회원 ${it.size}명 조회 완료" } }
             .toRetrieveListResponse()
+            .also { log.info { "[MemberService.findMembers] 완료. ${it.members.size}명 반환" } }
     }
 
+    @Transactional(readOnly = true)
     fun findById(memberId: Long): MemberEntity {
-        return fetchOrThrow("findById", "memberId=$memberId") {
+        log.info { "[MemberService.findById] 시작" }
-            memberRepository.findByIdOrNull(memberId)
+
-        }
+        return memberFinder.findById(memberId)
+            .also { log.info { "[MemberService.findById] 완료. memberId=${memberId}, email=${it.email}" } }
     }
 
+    @Transactional(readOnly = true)
     fun findByEmailAndPassword(email: String, password: String): MemberEntity {
-        return fetchOrThrow("findByEmailAndPassword", "email=$email, password=$password") {
+        log.info { "[MemberService.findByEmailAndPassword] 시작" }
-            memberRepository.findByEmailAndPassword(email, password)
+
-        }
+        return memberFinder.findByEmailAndPassword(email, password)
+            .also { log.info { "[MemberService.findByEmailAndPassword] 완료. email=${email}, memberId=${it.id}" } }
     }
 
     @Transactional
     fun createMember(request: SignupRequest): SignupResponse {
-        memberRepository.findByEmail(request.email)?.let {
+        log.info { "[MemberService.createMember] 시작" }
-            log.info { "[MemberService.createMember] 회원가입 실패(이메일 중복): email=${request.email}" }
-            throw MemberException(MemberErrorCode.DUPLICATE_EMAIL)
-        }
 
-        val member = MemberEntity(
+        return memberWriter.create(request.name, request.email, request.password, Role.MEMBER)
-            _id = tsidFactory.next(),
+            .toSignupResponse()
-            name = request.name,
+            .also { log.info { "[MemberService.create] 완료: email=${request.email} memberId=${it.id}" } }
-            email = request.email,
-            password = request.password,
-            role = Role.MEMBER
-        )
-
-        return memberRepository.save(member).toSignupResponse()
-            .also { log.info { "[MemberService.create] 회원가입 완료: email=${request.email} memberId=${it.id}" } }
-    }
-
-    private fun fetchOrThrow(calledBy: String, params: String, block: () -> MemberEntity?): MemberEntity {
-        log.debug { "[MemberService.$calledBy] 회원 조회 시작: $params" }
-        return block()
-            ?.also { log.info { "[MemberService.$calledBy] 회원 조회 완료: memberId=${it.id}" } }
-            ?: run {
-                log.info { "[MemberService.$calledBy] 회원 조회 실패: $params" }
-                throw MemberException(MemberErrorCode.MEMBER_NOT_FOUND)
-            }
     }
 }

src/main/kotlin/roomescape/member/implement/MemberFinder.kt

@@ -0,0 +1,47 @@
+package roomescape.member.implement
+
+import io.github.oshai.kotlinlogging.KLogger
+import io.github.oshai.kotlinlogging.KotlinLogging
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.stereotype.Component
+import roomescape.member.exception.MemberErrorCode
+import roomescape.member.exception.MemberException
+import roomescape.member.infrastructure.persistence.MemberEntity
+import roomescape.member.infrastructure.persistence.MemberRepository
+
+private val log: KLogger = KotlinLogging.logger {}
+
+@Component
+class MemberFinder(
+    private val memberRepository: MemberRepository
+) {
+
+    fun findAll(): List<MemberEntity> {
+        log.debug { "[MemberFinder.findAll] 회원 조회 시작" }
+
+        return memberRepository.findAll()
+            .also { log.debug { "[MemberFinder.findAll] 회원 ${it.size}명 조회 완료" } }
+    }
+
+    fun findById(id: Long): MemberEntity {
+        log.debug { "[MemberFinder.findById] 조회 시작: memberId=$id" }
+
+        return memberRepository.findByIdOrNull(id)
+            ?.also { log.debug { "[MemberFinder.findById] 조회 완료: memberId=$id, email=${it.email}" } }
+            ?: run {
+                log.info { "[MemberFinder.findById] 조회 실패: id=$id" }
+                throw MemberException(MemberErrorCode.MEMBER_NOT_FOUND)
+            }
+    }
+
+    fun findByEmailAndPassword(email: String, password: String): MemberEntity {
+        log.debug { "[MemberFinder.findByEmailAndPassword] 조회 시작: email=$email, password=$password" }
+
+        return memberRepository.findByEmailAndPassword(email, password)
+            ?.also { log.debug { "[MemberFinder.findByEmailAndPassword] 조회 완료: email=${email}, memberId=${it.id}" } }
+            ?: run {
+                log.info { "[MemberFinder.findByEmailAndPassword] 조회 실패: email=${email}, password=${password}" }
+                throw MemberException(MemberErrorCode.MEMBER_NOT_FOUND)
+            }
+    }
+}

src/main/kotlin/roomescape/member/implement/MemberWriter.kt

@@ -0,0 +1,34 @@
+package roomescape.member.implement
+
+import com.github.f4b6a3.tsid.TsidFactory
+import io.github.oshai.kotlinlogging.KLogger
+import io.github.oshai.kotlinlogging.KotlinLogging
+import org.springframework.stereotype.Component
+import roomescape.common.config.next
+import roomescape.member.infrastructure.persistence.MemberEntity
+import roomescape.member.infrastructure.persistence.MemberRepository
+import roomescape.member.infrastructure.persistence.Role
+
+private val log: KLogger = KotlinLogging.logger {}
+
+@Component
+class MemberWriter(
+    private val tsidFactory: TsidFactory,
+    private val memberValidator: MemberValidator,
+    private val memberRepository: MemberRepository
+) {
+    fun create(name: String, email: String, password: String, role: Role): MemberEntity {
+        memberValidator.validateCanSignup(email)
+
+        val member = MemberEntity(
+            _id = tsidFactory.next(),
+            name = name,
+            email = email,
+            password = password,
+            role = role
+        )
+
+        return memberRepository.save(member)
+            .also { log.info { "[MemberWriter.create] 회원 저장 완료: email=$email, memberId=${it.id}" } }
+    }
+}

src/main/kotlin/roomescape/member/infrastructure/persistence/MemberRepository.kt

@@ -3,7 +3,7 @@ package roomescape.member.infrastructure.persistence
 import org.springframework.data.jpa.repository.JpaRepository
 
 interface MemberRepository : JpaRepository<MemberEntity, Long> {
-    fun findByEmailAndPassword(email: String, password: String): MemberEntity?
+    fun existsByEmail(email: String): Boolean
 
-    fun findByEmail(email: String): MemberEntity?
+    fun findByEmailAndPassword(email: String, password: String): MemberEntity?
 }

src/test/kotlin/roomescape/member/controller/MemberControllerTest.kt

@@ -96,8 +96,8 @@ class MemberControllerTest(
             )
             `when`("같은 이메일이 없으면") {
                 every {
-                    memberRepository.findByEmail(request.email)
+                    memberRepository.existsByEmail(request.email)
-                } returns null
+                } returns false
 
                 every {
                     memberRepository.save(any())
@@ -124,8 +124,8 @@ class MemberControllerTest(
 
             `when`("같은 이메일이 있으면") {
                 every {
-                    memberRepository.findByEmail(request.email)
+                    memberRepository.existsByEmail(request.email)
-                } returns mockk()
+                } returns true
 
                 then("에러 응답") {
                     val expectedError = MemberErrorCode.DUPLICATE_EMAIL

src/test/kotlin/roomescape/member/implement/MemberFinderTest.kt

@@ -0,0 +1,85 @@
+package roomescape.member.implement
+
+import io.kotest.assertions.throwables.shouldThrow
+import io.kotest.core.spec.style.FunSpec
+import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.shouldBe
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.verify
+import org.springframework.data.repository.findByIdOrNull
+import roomescape.member.exception.MemberErrorCode
+import roomescape.member.exception.MemberException
+import roomescape.member.infrastructure.persistence.MemberRepository
+
+class MemberFinderTest : FunSpec({
+
+    val memberRepository: MemberRepository = mockk()
+    val memberFinder = MemberFinder(memberRepository)
+
+    context("findAll") {
+        test("모든 회원을 조회한다.") {
+            every {
+                memberRepository.findAll()
+            } returns listOf(mockk(), mockk(), mockk())
+
+            memberFinder.findAll() shouldHaveSize 3
+        }
+    }
+
+    context("findById") {
+        val memberId = 1L
+        test("동일한 ID인 회원을 찾아 응답한다.") {
+            every {
+                memberRepository.findByIdOrNull(memberId)
+            } returns mockk()
+
+            memberFinder.findById(memberId)
+
+            verify(exactly = 1) {
+                memberRepository.findByIdOrNull(memberId)
+            }
+        }
+
+        test("동일한 ID인 회원이 없으면 실패한다.") {
+            every {
+                memberRepository.findByIdOrNull(memberId)
+            } returns null
+
+            shouldThrow<MemberException> {
+                memberFinder.findById(memberId)
+            }.also {
+                it.errorCode shouldBe MemberErrorCode.MEMBER_NOT_FOUND
+            }
+        }
+    }
+
+    context("findByEmailAndPassword") {
+        val email = "email"
+        val password = "password"
+
+        test("동일한 이메일과 비밀번호를 가진 회원을 찾아 응답한다.") {
+            every {
+                memberRepository.findByEmailAndPassword(email, password)
+            } returns mockk()
+
+            memberFinder.findByEmailAndPassword(email, password)
+
+            verify(exactly = 1) {
+                memberRepository.findByEmailAndPassword(email, password)
+            }
+        }
+
+        test("동일한 이메일과 비밀번호를 가진 회원이 없으면 실패한다.") {
+            every {
+                memberRepository.findByEmailAndPassword(email, password)
+            } returns null
+
+            shouldThrow<MemberException> {
+                memberFinder.findByEmailAndPassword(email, password)
+            }.also {
+                it.errorCode shouldBe MemberErrorCode.MEMBER_NOT_FOUND
+            }
+        }
+    }
+})

src/test/kotlin/roomescape/member/implement/MemberValidatorTest.kt

@@ -0,0 +1,44 @@
+package roomescape.member.implement
+
+import io.kotest.assertions.throwables.shouldNotThrow
+import io.kotest.assertions.throwables.shouldThrow
+import io.kotest.core.spec.style.FunSpec
+import io.kotest.core.spec.style.StringSpec
+import io.kotest.matchers.shouldBe
+import io.mockk.every
+import io.mockk.mockk
+import roomescape.member.exception.MemberErrorCode
+import roomescape.member.exception.MemberException
+import roomescape.member.infrastructure.persistence.MemberRepository
+
+class MemberValidatorTest : FunSpec({
+
+    val memberRepository: MemberRepository = mockk()
+    val memberValidator = MemberValidator(memberRepository)
+
+    context("validateCanSignup") {
+        val email = "email@email.com"
+
+        test("같은 이메일을 가진 회원이 있으면 예외를 던진다.") {
+            every {
+                memberRepository.existsByEmail(email)
+            } returns true
+
+            shouldThrow<MemberException> {
+                memberValidator.validateCanSignup(email)
+            }.also {
+                it.errorCode shouldBe MemberErrorCode.DUPLICATE_EMAIL
+            }
+        }
+
+        test("같은 이메일을 가진 회원이 없으면 종료한다.") {
+            every {
+                memberRepository.existsByEmail(email)
+            } returns false
+
+            shouldNotThrow<MemberException> {
+                memberValidator.validateCanSignup(email)
+            }
+        }
+    }
+})

src/test/kotlin/roomescape/member/implement/MemberWriterTest.kt

@@ -0,0 +1,65 @@
+package roomescape.member.implement
+
+import io.kotest.assertions.throwables.shouldThrow
+import io.kotest.core.spec.style.FunSpec
+import io.kotest.core.spec.style.StringSpec
+import io.kotest.matchers.nulls.shouldNotBeNull
+import io.kotest.matchers.shouldBe
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.slot
+import io.mockk.spyk
+import io.mockk.verify
+import roomescape.member.exception.MemberErrorCode
+import roomescape.member.exception.MemberException
+import roomescape.member.infrastructure.persistence.MemberEntity
+import roomescape.member.infrastructure.persistence.MemberRepository
+import roomescape.member.infrastructure.persistence.Role
+import roomescape.util.MemberFixture
+import roomescape.util.TsidFactory
+
+class MemberWriterTest : FunSpec({
+    val memberRepository: MemberRepository = mockk()
+    val memberValidator = MemberValidator(memberRepository)
+    val memberWriter = MemberWriter(TsidFactory, memberValidator, memberRepository)
+
+    context("create") {
+        val name = "name"
+        val email = "email"
+        val password = "password"
+        val role = Role.MEMBER
+
+        test("중복된 이메일이 있으면 실패한다.") {
+            every {
+                memberRepository.existsByEmail(any())
+            } returns true
+
+            shouldThrow<MemberException> {
+                memberWriter.create(name, email, password, role)
+            }.also {
+                it.errorCode shouldBe MemberErrorCode.DUPLICATE_EMAIL
+            }
+        }
+
+        test("중복된 이메일이 없으면 저장한다.") {
+            every {
+                memberRepository.existsByEmail(any())
+            } returns false
+
+            every {
+                memberRepository.save(any())
+            } returns MemberFixture.create(
+                name = name,
+                account = email,
+                password = password,
+                role = role
+            )
+
+            memberWriter.create(name, email, password, role)
+
+            verify(exactly = 1) {
+                memberRepository.save(any())
+            }
+        }
+    }
+})