test: create notice service test code(kotest + mockk)

domain/src/test/kotlin/com/knet/dormitory/domain/notice/service/KotestMockkNoticeServiceTest.kt

@@ -0,0 +1,53 @@
+package com.knet.dormitory.domain.notice.service
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.knet.dormitory.domain.notice.Notice
+import com.knet.dormitory.domain.notice.NoticeTopic
+import com.knet.dormitory.domain.notice.repository.NoticeRepository
+import io.kotest.core.spec.style.BehaviorSpec
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.verify
+import org.junit.jupiter.api.Assertions
+import org.springframework.web.reactive.function.client.WebClient
+import java.time.LocalDate
+
+class KotestMockkNoticeServiceTest : BehaviorSpec({
+    val webClient: WebClient = mockk()
+    val objectMapper: ObjectMapper = mockk()
+    val noticeRepository: NoticeRepository = mockk()
+
+    given("10개의 notice가 존재할 때") {
+        val testNotices = arrayListOf<Notice>()
+        for (i in 0 until 10) {
+            testNotices.add(
+                Notice(
+                    title = "title$i",
+                    writerName = "writer name$i",
+                    writerId = "writer id$i",
+                    topic = NoticeTopic.KW_DORM_COMMON,
+                    createdAt = LocalDate.now()
+                )
+            )
+        }
+        every { noticeRepository.findAllByOrderByInfoCreatedAtAsc() } returns testNotices
+
+        val noticeService = DormitoryNoticeService(
+            webClient = webClient,
+            objectMapper = objectMapper,
+            noticeRepository = noticeRepository
+        )
+
+        `when`("findall로 조회하면") {
+            val notices = noticeService.findAll()
+
+            then("10개의 notice가 조회되어야한다.") {
+                Assertions.assertTrue { notices.size == 10 }
+            }
+            then("findAllByOrderByInfoCreatedAtAsc 가 한번만 조회되어야한다.") {
+                verify(exactly = 1) { noticeRepository.findAllByOrderByInfoCreatedAtAsc() }
+            }
+        }
+    }
+}) {
+}