feat: add and impl ReservationServiceTest.java

Author: Kattsyn

rentplace/src/test/java/kattsyn/dev/rentplace/services/ReservationServiceTest.java

@@ -0,0 +1,82 @@
+package kattsyn.dev.rentplace.services;
+
+import kattsyn.dev.rentplace.services.impl.ReservationServiceImpl;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import kattsyn.dev.rentplace.entities.Reservation;
+import kattsyn.dev.rentplace.exceptions.ValidationException;
+import java.time.LocalDate;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class ReservationServiceTest {
+
+    @Mock
+    private Reservation reservation;
+
+    @InjectMocks
+    private ReservationServiceImpl reservationService;
+
+    @Test
+    void countRentPrice_LongTerm_ReturnsCorrectMonths() {
+        when(reservation.isLongTermRent()).thenReturn(true);
+        when(reservation.getStartDate()).thenReturn(LocalDate.of(2026, 6, 1));
+        when(reservation.getEndDate()).thenReturn(LocalDate.of(2026, 10, 1));
+        when(reservation.getCostInPeriod()).thenReturn(100);
+
+        int result = reservationService.countRentPrice(reservation);
+        assertEquals(400, result); // 4 месяца по 100
+    }
+
+    @Test
+    void countRentPrice_ShortTerm_ReturnsCorrectMonths() {
+        when(reservation.isLongTermRent()).thenReturn(false);
+        when(reservation.getStartDate()).thenReturn(LocalDate.of(2026, 4, 1));
+        when(reservation.getEndDate()).thenReturn(LocalDate.of(2026, 4, 15));
+        when(reservation.getCostInPeriod()).thenReturn(100);
+
+        int result = reservationService.countRentPrice(reservation);
+        assertEquals(1400, result); // 14 дней по 100
+    }
+
+    @Test
+    void countRentPrice_LongTermCrossingYear_ReturnsCorrectMonths() {
+        when(reservation.isLongTermRent()).thenReturn(true);
+        when(reservation.getStartDate()).thenReturn(LocalDate.of(2026, 12, 1));
+        when(reservation.getEndDate()).thenReturn(LocalDate.of(2027, 1, 1));
+        when(reservation.getCostInPeriod()).thenReturn(100);
+
+        int result = reservationService.countRentPrice(reservation);
+        assertEquals(100, result); // 1 месяц
+    }
+
+    @Test
+    void countRentPrice_ShortTermCrossingYear_ReturnsCorrectDays() {
+        when(reservation.isLongTermRent()).thenReturn(false);
+        when(reservation.getStartDate()).thenReturn(LocalDate.of(2026, 12, 31));
+        when(reservation.getEndDate()).thenReturn(LocalDate.of(2027, 1, 2));
+        when(reservation.getCostInPeriod()).thenReturn(50);
+
+        int result = reservationService.countRentPrice(reservation);
+        assertEquals(2 * 50, result); // 2 дня
+    }
+
+    @Test
+    void countRentPrice_EndDateBeforeStartDate_ThrowsException() {
+        when(reservation.getStartDate()).thenReturn(LocalDate.of(2024, 1, 10));
+        when(reservation.getEndDate()).thenReturn(LocalDate.of(2024, 1, 5));
+
+        assertThrows(ValidationException.class, () -> reservationService.countRentPrice(reservation));
+    }
+
+    @Test
+    void countRentPrice_StartDateInPast_ThrowsException() {
+        when(reservation.getStartDate()).thenReturn(LocalDate.now().minusDays(1));
+
+        assertThrows(ValidationException.class, () -> reservationService.countRentPrice(reservation));
+    }
+}