public async Task <IActionResult> Edit(long id, [Bind("Id,Name,Price,RoomId")] Equipment equipment)
        {
            if (id != equipment.Id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    await _equipmentService.UpdateAndSave(equipment);
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!_equipmentService.EquipmentExists(equipment.Id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["RoomId"] = new SelectList(await _equipmentService.GetAllRooms(), "Id", "Id", equipment.RoomId);
            return(View(equipment));
        }
        public void ExistsTest()
        {
            var fakeEquipmentRepositoryMock = new Mock <IEquipmentRepository>();
            var fakeRoomRepositoryMock      = new Mock <IRoomRepository>();

            fakeEquipmentRepositoryMock.Setup(x => x.EquipmentExists(It.IsAny <long>())).Returns(true);

            var equipmentService = new EquipmentService(fakeEquipmentRepositoryMock.Object, fakeRoomRepositoryMock.Object);

            bool result = equipmentService.EquipmentExists(1);

            Assert.True(result);
        }