public void MemoryController_WithValidId_ShouldDeleteMemoryFromDb() { int id = 1; var dbMemory = new Memory() { Amount = 8, Frequency = 2444, Manufacturer = "Memories", ModelName = "Magma reaper", ModulesType = "SIMM", Price = 175, Socket = "PGHT", Type = "DDR4" }; dbContext.Memory.Add(dbMemory); dbContext.SaveChanges(); controller.DeleteConfirmed(id); var memory = dbContext.Memory.FirstOrDefault(); var countOfEntities = dbContext.Memory.ToList().Count; Assert.IsNull(memory); Assert.AreEqual(0, countOfEntities); }