feat: ReservationSearchSpecification 내 예약 상태를 지정하는 조건 추가 및 테스트

src/main/kotlin/roomescape/reservation/infrastructure/persistence/ReservationSearchSpecification.kt

@@ -33,6 +33,10 @@ class ReservationSearchSpecification(
         }
     })
 
+    fun status(vararg statuses: ReservationStatus) = andIfNotNull { root, _, cb ->
+        root.get<ReservationStatus>("status").`in`(statuses.toList())
+    }
+
     fun confirmed(): ReservationSearchSpecification = andIfNotNull { root, _, cb ->
         cb.or(
             cb.equal(

src/test/kotlin/roomescape/reservation/infrastructure/persistence/ReservationSearchSpecificationTest.kt

@@ -81,6 +81,21 @@ class ReservationSearchSpecificationTest(
             }
         }
 
+        "여러 상태를 입력받아 같은 상태안 예약을 조회한다." {
+            val spec = ReservationSearchSpecification()
+                .status(
+                    ReservationStatus.CONFIRMED,
+                    ReservationStatus.CONFIRMED_PAYMENT_REQUIRED,
+                    ReservationStatus.WAITING
+                ).build()
+
+            val results: List<ReservationEntity> = reservationRepository.findAll(spec)
+
+            assertSoftly(results) {
+                this shouldHaveSize reservationRepository.findAll().size
+            }
+        }
+
         "확정 상태인 예약을 조회한다" {
             val spec = ReservationSearchSpecification()
                 .confirmed()