public void GetDispatchableDrugStock_WithValidInput_ReturnsOK(int drugId, string location)
        {
            // Arrange
            DrugLocation drugLocation = (drugList.FirstOrDefault(d => d.Id == drugId && d.DrugLocation.Location == location)).DrugLocation;

            _drugServiceMock.Setup(p => p.GetDispatchableDrugStock(drugId, location)).Returns(drugLocation);

            // Act
            OkObjectResult data = _drugsController.GetDispatchableDrugStock(drugId, location) as OkObjectResult;

            // Assert
            Assert.AreEqual(200, data.StatusCode);
        }