public void PatchReservation_WithExistingReservationAndId_ShouldReturnOkObjectResult() { // Act var result = sut.PatchReservation(patchedReservation, existingReservationId); // Assert Assert.IsInstanceOfType(result, typeof(OkObjectResult)); mockReservationRepository.Verify(r => r.Retrieve(existingReservationId), Times.Once); mockReservationService.Verify(r => r.Save(existingReservationId, reservation), Times.Once); }