fix(calculate): 관리자 정산 엑셀 다운로드를 스트리밍 방식으로 전환한다

src/test/kotlin/kr/co/vividnext/sodalive/admin/calculate/channelDonation/AdminChannelDonationCalculateControllerTest.kt

@@ -6,10 +6,9 @@ import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Test
 import org.mockito.Mockito
-import org.springframework.core.io.InputStreamResource
 import org.springframework.data.domain.PageRequest
 import org.springframework.http.HttpHeaders
-import java.io.ByteArrayInputStream
+import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody
 
 class AdminChannelDonationCalculateControllerTest {
     private lateinit var service: AdminChannelDonationCalculateService
@@ -135,6 +134,38 @@ class AdminChannelDonationCalculateControllerTest {
         )
     }
 
+    @Test
+    @DisplayName("관리자 컨트롤러는 날짜별 정산 엑셀을 다운로드한다")
+    fun shouldDownloadDateSettlementExcel() {
+        Mockito.`when`(
+            service.downloadChannelDonationByDateExcel(
+                startDateStr = "2026-02-01",
+                endDateStr = "2026-02-29"
+            )
+        ).thenReturn(StreamingResponseBody { outputStream -> outputStream.write(byteArrayOf(1, 2, 3)) })
+
+        val response = controller.downloadChannelDonationByDateExcel(
+            startDateStr = "2026-02-01",
+            endDateStr = "2026-02-29"
+        )
+
+        assertEquals(200, response.statusCode.value())
+        val contentDispositionHeader = response.headers.getFirst(HttpHeaders.CONTENT_DISPOSITION)
+        assertNotNull(contentDispositionHeader)
+        assertEquals(true, contentDispositionHeader?.contains("attachment; filename*="))
+        assertEquals(
+            "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+            response.headers.contentType.toString()
+        )
+        assertNotNull(response.body)
+        assertEquals(true, response.body is StreamingResponseBody)
+
+        Mockito.verify(service).downloadChannelDonationByDateExcel(
+            startDateStr = "2026-02-01",
+            endDateStr = "2026-02-29"
+        )
+    }
+
     @Test
     @DisplayName("관리자 컨트롤러는 크리에이터별 정산 엑셀을 다운로드한다")
     fun shouldDownloadCreatorSettlementExcel() {
@@ -143,7 +174,7 @@ class AdminChannelDonationCalculateControllerTest {
                 startDateStr = "2026-02-01",
                 endDateStr = "2026-02-29"
             )
-        ).thenReturn(ByteArrayInputStream(byteArrayOf(1, 2, 3)))
+        ).thenReturn(StreamingResponseBody { outputStream -> outputStream.write(byteArrayOf(1, 2, 3)) })
 
         val response = controller.downloadChannelDonationByCreatorExcel(
             startDateStr = "2026-02-01",
@@ -159,7 +190,7 @@ class AdminChannelDonationCalculateControllerTest {
             response.headers.contentType.toString()
         )
         assertNotNull(response.body)
-        assertEquals(true, response.body is InputStreamResource)
+        assertEquals(true, response.body is StreamingResponseBody)
 
         Mockito.verify(service).downloadChannelDonationByCreatorExcel(
             startDateStr = "2026-02-01",

src/test/kotlin/kr/co/vividnext/sodalive/admin/calculate/channelDonation/AdminChannelDonationCalculateServiceTest.kt

@@ -7,6 +7,7 @@ import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Test
 import org.mockito.Mockito
+import java.io.ByteArrayOutputStream
 
 class AdminChannelDonationCalculateServiceTest {
     private lateinit var repository: AdminChannelDonationCalculateQueryRepository
@@ -153,6 +154,54 @@ class AdminChannelDonationCalculateServiceTest {
         )
     }
 
+    @Test
+    @DisplayName("관리자 날짜별 정산 엑셀 다운로드는 xlsx 바이트를 생성한다")
+    fun shouldGenerateDateSettlementExcelBytes() {
+        Mockito.`when`(
+            repository.getChannelDonationByDateTotalCount(
+                "2026-02-20".convertLocalDateTime(),
+                "2026-02-21".convertLocalDateTime(hour = 23, minute = 59, second = 59)
+            )
+        ).thenReturn(1)
+        Mockito.`when`(
+            repository.getChannelDonationByDate(
+                "2026-02-20".convertLocalDateTime(),
+                "2026-02-21".convertLocalDateTime(hour = 23, minute = 59, second = 59),
+                0L,
+                1L
+            )
+        ).thenReturn(
+            listOf(
+                GetAdminChannelDonationSettlementQueryData(
+                    date = "2026-02-20",
+                    creator = "creator-a",
+                    count = 3L,
+                    totalCan = 100
+                )
+            )
+        )
+
+        val response = service.downloadChannelDonationByDateExcel(
+            startDateStr = "2026-02-20",
+            endDateStr = "2026-02-21"
+        )
+        val outputStream = ByteArrayOutputStream()
+        response.writeTo(outputStream)
+
+        assertTrue(outputStream.toByteArray().isNotEmpty())
+
+        Mockito.verify(repository).getChannelDonationByDateTotalCount(
+            "2026-02-20".convertLocalDateTime(),
+            "2026-02-21".convertLocalDateTime(hour = 23, minute = 59, second = 59)
+        )
+        Mockito.verify(repository).getChannelDonationByDate(
+            "2026-02-20".convertLocalDateTime(),
+            "2026-02-21".convertLocalDateTime(hour = 23, minute = 59, second = 59),
+            0L,
+            1L
+        )
+    }
+
     @Test
     @DisplayName("관리자 크리에이터별 정산 엑셀 다운로드는 xlsx 바이트를 생성한다")
     fun shouldGenerateCreatorSettlementExcelBytes() {
@@ -175,8 +224,10 @@ class AdminChannelDonationCalculateServiceTest {
             startDateStr = "2026-02-20",
             endDateStr = "2026-02-21"
         )
+        val outputStream = ByteArrayOutputStream()
+        response.writeTo(outputStream)
 
-        assertTrue(response.readAllBytes().isNotEmpty())
+        assertTrue(outputStream.toByteArray().isNotEmpty())
 
         Mockito.verify(repository).getChannelDonationByCreatorForExcel(
             "2026-02-20".convertLocalDateTime(),