final lab1

Romashki/RomashkiContract/DataModels/DiscountDataModel.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContracts.Exceptions;
+using RomashkiContracts.Extensions;
+using RomashkiContracts.Infrastructure;
+
+namespace RomashkiContract.DataModels;
+
+public class DiscountDataModel(string buyerId, DateTime discountDate, double discountSize) : IValidation
+{
+    public string BuyerId{ get; private set; } = buyerId;
+    public DateTime DiscountDate { get; private set; } = discountDate;
+    public double DiscountSize { get; private set; } = discountSize;
+    public void Validate()
+    {
+        if (BuyerId.IsEmpty())
+            throw new ValidationException("Field BuyerId is empty");
+        if (!BuyerId.IsGuid())
+            throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+    if (discountSize < 0)
+            throw new ValidationException("Field DiscountSize is less than or equal to 0");
+    if (discountSize > 100)
+            throw new ValidationException("Field DiscountSize is more than 100");
+
+    }
+
+}

Romashki/RomashkiContract/Enums/ProductType.cs

@@ -9,8 +9,8 @@ namespace RomashkiContracts.Enums;
 public enum ProductType
 {
     None = 0,
-    HomemadeFlowers = 1,
+    HomeFlower = 1,
-    BeautifulFlowers = 2,
+    Flower = 2,
     Accessory = 3
 }
 

Romashki/RomashkiTests/DiscountDataModelTests.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RomashkiContract.DataModels;
+using RomashkiContracts.Exceptions;
+
+namespace RomashkiTests;
+
+internal class DiscountDataModelTests
+{
+    [Test]
+    public void BuyerIdIsEmptyTest()
+    {
+        var discount = CreateDataModel(null, DateTime.Now, 10);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+        discount = CreateDataModel(string.Empty, DateTime.Now, 10);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void BuyerIdIsNotGuidTest()
+    {
+        var discount = CreateDataModel("buyerId", DateTime.Now, 10);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void DiscountIsLessOrMoreTest()
+    {
+        var discount = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, -1);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+        discount = CreateDataModel(Guid.NewGuid().ToString(), DateTime.Now, 101);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var discountDate = DateTime.Now.AddDays(-3).AddMinutes(-5);
+        var discountSize = 10;
+        var discount = CreateDataModel(buyerId, discountDate, discountSize);
+        Assert.That(() => discount.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(discount.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(discount.DiscountDate, Is.EqualTo(discountDate));
+            Assert.That(discount.DiscountSize, Is.EqualTo(discountSize));
+        });
+    }
+    private static DiscountDataModel CreateDataModel(string? buyerId, DateTime discountDate, double discountSize) => 
+        new(buyerId, discountDate, discountSize);
+
+}