test: 테스트 수정

Author: devtaebong

src/main/kotlin/lotto/domain/Statistics.kt

@@ -2,10 +2,10 @@ package lotto.domain
 
 data class Statistics(val rank: Int, val matchCount: Int) {
     fun earnings(): Long {
-        return (earningPriceByRanking() * matchCount).toLong()
+        return earningPriceByRanking() * matchCount
     }
 
-    private fun earningPriceByRanking() =
+    private fun earningPriceByRanking(): Long =
         when (rank) {
             RANK_FIRST -> FIRST_RANK_EARNING
             RANK_SECOND -> SECOND_RANK_EARNING
@@ -22,12 +22,12 @@ data class Statistics(val rank: Int, val matchCount: Int) {
         private const val RANK_FOURTH = 4
         private const val RANK_FIFTH = 5
 
-        private const val FIRST_RANK_EARNING = 2_000_000_000
-        private const val SECOND_RANK_EARNING = 1_500_000
-        private const val THIRD_RANK_EARNING = 50_000
-        private const val FOURTH_RANK_EARNING = 5_000
-        private const val FIFTH_RANK_EARNING = 0
-        private const val NO_RANK_EARNING = 0
+        private const val FIRST_RANK_EARNING = 2_000_000_000L
+        private const val SECOND_RANK_EARNING = 1_500_000L
+        private const val THIRD_RANK_EARNING = 50_000L
+        private const val FOURTH_RANK_EARNING = 5_000L
+        private const val FIFTH_RANK_EARNING = 0L
+        private const val NO_RANK_EARNING = 0L
 
         fun of(
             userLottos: List<Lotto>,

src/test/kotlin/lotto/domain/StatisticsTest.kt

@@ -39,13 +39,13 @@ class StatisticsTest : DescribeSpec({
     describe("earningsRatio test") {
         it("Integer Overflow 발생하지 않도록 헨들링") {
             val statistics = Statistics(rank = 1, matchCount = 2)
-            val actual = Statistics.earningsRatio(statistics)
+            val actual = statistics.earnings()
             actual shouldBe 4_000_000_000
         }
 
         it("3등 3장") {
             val statistics = Statistics(rank = 3, matchCount = 3)
-            val actual = Statistics.earningsRatio(statistics)
+            val actual = statistics.earnings()
             actual shouldBe 150000
         }
     }