feat(channel-donation-calculate): 채널 후원 정산 조회 기능을 추가한다

2026-02-26 18:57:02 +09:00
parent dd9cd788ca
commit 19d3544c72
24 changed files with 1346 additions and 0 deletions
@@ -0,0 +1,43 @@
+package kr.co.vividnext.sodalive.calculate.channelDonation
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+
+class ChannelDonationSettlementCalculatorTest {
+    @Test
+    @DisplayName("정산 공식에 따라 금액을 계산한다")
+    fun shouldCalculateSettlementAmountsWithExpectedFormula() {
+        val result = ChannelDonationSettlementCalculator.calculate(totalCan = 100)
+
+        assertEquals(10_000, result.krw)
+        assertEquals(660, result.fee)
+        assertEquals(7_939, result.settlementAmount)
+        assertEquals(262, result.withholdingTax)
+        assertEquals(7_677, result.depositAmount)
+    }
+
+    @Test
+    @DisplayName("소수 계산은 단계별 반올림 규칙을 따른다")
+    fun shouldRoundHalfUpOnDecimalResults() {
+        val result = ChannelDonationSettlementCalculator.calculate(totalCan = 1)
+
+        assertEquals(100, result.krw)
+        assertEquals(7, result.fee)
+        assertEquals(79, result.settlementAmount)
+        assertEquals(3, result.withholdingTax)
+        assertEquals(76, result.depositAmount)
+    }
+
+    @Test
+    @DisplayName("총 캔 수가 0이면 모든 금액은 0이다")
+    fun shouldReturnZeroWhenTotalCanIsZero() {
+        val result = ChannelDonationSettlementCalculator.calculate(totalCan = 0)
+
+        assertEquals(0, result.krw)
+        assertEquals(0, result.fee)
+        assertEquals(0, result.settlementAmount)
+        assertEquals(0, result.withholdingTax)
+        assertEquals(0, result.depositAmount)
+    }
+}