finskayMagazin/TestTovarV2/Korzina.cs

using Avalonia;
using Avalonia.Headless;
using Avalonia.Controls;
using TovarV2;

namespace TestTovarV2
{
    [TestFixture]
    public class KorzinaTests
    {
        private Korzina _korzina;

        [OneTimeSetUp]
        public void OneTimeSetup()
        {
            AppBuilder.Configure<App>()
                .UseHeadless(new AvaloniaHeadlessPlatformOptions())
                .SetupWithoutStarting();
        }

        [SetUp]
        public void Setup()
        {
            ListPr.productSelects.Clear();
            ListPr.productSelects.AddRange(new List<ProductSelect>
            {
                new ProductSelect { Id = 0, nameProdKorz = "Test 1", priceProdKorz = 100, quantityProdKorz = 1, quantitySelect = 1 },
                new ProductSelect { Id = 1, nameProdKorz = "Test 2", priceProdKorz = 200, quantityProdKorz = 2, quantitySelect = 1 },
                new ProductSelect { Id = 2, nameProdKorz = "Test 3", priceProdKorz = 300, quantityProdKorz = 3, quantitySelect = 1 }
            });

            _korzina = new Korzina();
            _korzina.Show();
        }

        [TearDown]
        public void TearDown()
        {
            _korzina.Close();
            ListPr.productSelects.Clear();
        }
        
        [Test]
        public void DelBtnOnClick_ShouldRemoveProduct_WhenFirstProductIsSelected()
        {
            int initialCount = ListPr.productSelects.Count;
        
            var delButton = new Button { Tag = 0 };
            _korzina.DelBtn_Click(delButton, null);
        
            Assert.That(initialCount - 1 == ListPr.productSelects.Count);
        }
        
        [Test]
        public void DelBtnOnClick_ShouldRemoveProduct_WhenSecondProductIsSelected()
        {
            int initialCount = ListPr.productSelects.Count;
        
            var delButton = new Button { Tag = 1 };
            _korzina.DelBtn_Click(delButton, null);
        
            Assert.That(initialCount - 1 == ListPr.productSelects.Count);
        }
        
        [Test]
        public void CheckQuantity_ShouldCapAtMax_WhenQuantityExceedsStock()
        {
            var result = _korzina.CheckQuantity(10, 5);
            
            Assert.That(5 == result);
        }

        [Test]
        public void CheckQuantity_ShouldRaiseToMin_WhenQuantityBelowOne()
        {
            var result = _korzina.CheckQuantity(0, 5);
            
            Assert.That(1 == result);
        }

        [Test]
        public void CheckQuantity_ShouldReturnSame_WhenWithinRange()
        {
            var result = _korzina.CheckQuantity(3, 5);
            
            Assert.That(3 == result);
        }

        [Test]
        public void NextPageOnClick_ShouldReturnLastTwoProducts_WhenThreeProductsInList()
        {
            _korzina.PagesConfig();
            _korzina.NextPage_OnClick(null, null);

            Assert.That("Test 3" == _korzina.currentProdSel[0].nameProdKorz);
        }
        
        [Test]
        public void PrevPageOnClick_ShouldReturnLastTwoProducts_WhenThreeProductsInList()
        {
            _korzina.PagesConfig();
            _korzina.NextPage_OnClick(null, null);
            _korzina.PrevPage_OnClick(null, null);

            Assert.That("Test 1" == _korzina.currentProdSel[0].nameProdKorz);
        }

        [Test]
        public void ReturnProdEditClick_ShouldOpenProductEditWindow_WhenItPressed()
        {
            _korzina.ReturnProdEdit_Click(null, null);
            Assert.That(ProductEdit.IsOpen);
        }
        
        [Test]
        public void PodschetOrderBtnClick_ShouldCalculateTotalPriceCorrectly_WhenDataIsCorrect()
        {
            var korzina = new Korzina();
            korzina.GetPodschetstoimosti = new TextBlock();
            ListPr.productSelects = new List<ProductSelect>()
            {
                new ProductSelect { priceProdKorz = 100, quantitySelect = 2 },
                new ProductSelect { priceProdKorz = 150, quantitySelect = 1 }
            };

            korzina.PodschetOrderBtn_Click(null, null);

            Assert.That("Общая стоимость составляет: 350 руб." == korzina.GetPodschetstoimosti.Text);
        }
        
        [Test]
        public void PodschetOrderBtnClick_ShouldCalculateTotalPriceCorrectly_WhenDataIsNotCorrect()
        {
            var korzina = new Korzina();
            korzina.GetPodschetstoimosti = new TextBlock();
            ListPr.productSelects = new List<ProductSelect>()
            {
                new ProductSelect { priceProdKorz = 100, quantitySelect = 0 },
                new ProductSelect { priceProdKorz = -150, quantitySelect = 1 }
            };

            korzina.PodschetOrderBtn_Click(null, null);

            Assert.That("Общая стоимость составляет: -150 руб." == korzina.GetPodschetstoimosti.Text);
        }
        
        [Test]
        public void ExitClick_ShouldOpenMainWindow_WhenItPressed()
        {
            _korzina.Exit_Click(null, null);
            Assert.That(MainWindow.IsOpen);
        }
        
        [Test]
        public void UvelBtnOnClick_ShouldIncreaseQuantity_WhenItPressedOnce()
        {
            var testProduct = ListPr.productSelects[0];
            testProduct.quantitySelect = 2;
            testProduct.quantityProdKorz = 10;
    
            var button = new Button { Tag = testProduct.Id };
            
            _korzina.UvelBtn_OnClick(button, null);
            
            Assert.That(testProduct.quantitySelect, Is.EqualTo(3));
        }

        [Test]
        public void UvelBtnOnClick_ShouldNotIncreaseAboveMaxQuantity_WhenItPressedOnce()
        {
            var testProduct = ListPr.productSelects[0];
            testProduct.quantitySelect = 10;
            testProduct.quantityProdKorz = 10;
    
            var button = new Button { Tag = testProduct.Id };
            
            _korzina.UvelBtn_OnClick(button, null);
            
            Assert.That(testProduct.quantitySelect, Is.EqualTo(10));
            Assert.That(_korzina.GetPodschetstoimosti.Text, Does.Contain("Ошибка"));
        }

        [Test]
        public void UmenBtnOnClick_ShouldDecreaseQuantity_WhenItPressedOnce()
        {
            var testProduct = ListPr.productSelects[0];
            testProduct.quantitySelect = 2;
    
            var button = new Button { Tag = testProduct.Id };
            
            _korzina.UmenBtn_OnClick(button, null);
            
            Assert.That(testProduct.quantitySelect, Is.EqualTo(1));
        }

        [Test]
        public void UmenBtnOnClick_ShouldNotDecreaseBelowOne_WhenItPressedOnce()
        {
            var testProduct = ListPr.productSelects[0];
            testProduct.quantitySelect = 1;
    
            var button = new Button { Tag = testProduct.Id };
            
            _korzina.UmenBtn_OnClick(button, null);
            
            Assert.That(testProduct.quantitySelect, Is.EqualTo(1));
        }
    }
}