using System;
using NUnit.Framework;
using CandyHouseBase.DataModels;
using CandyHouseBase.Exceptions;

namespace CandyHouseTests.DataModelsTests
{
    [TestFixture]
    public class IngredientStockDataModelTests
    {
        [Test]
        public void IngredientStock_ShouldThrowException_WhenIdIsInvalid()
        {
            var stock = new IngredientStockDataModel("", 10);
            Assert.Throws<ValidationException>(stock.Validate);
        }

        [Test]
        public void IngredientStock_ShouldThrowException_WhenQuantityIsNegative()
        {
            var stock = new IngredientStockDataModel(Guid.NewGuid().ToString(), -5);
            Assert.Throws<ValidationException>(stock.Validate);
        }

        [Test]
        public void IngredientStock_ShouldAddStockCorrectly()
        {
            var stock = new IngredientStockDataModel(Guid.NewGuid().ToString(), 10);
            stock.AddStock(5);
            Assert.That(stock.Quantity, Is.EqualTo(15));
        }

        [Test]
        public void IngredientStock_ShouldThrowException_WhenRemovingTooMuchStock()
        {
            var stock = new IngredientStockDataModel(Guid.NewGuid().ToString(), 10);
            Assert.Throws<ValidationException>(() => stock.RemoveStock(15));
        }
    }
}