Лаба 1 (Тесты + Модельки)

ChamomileСontracts/ChamomileTests/ChamomileTests.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <LangVersion>latest</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.4.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ChamomileСontracts\ChamomileСontracts.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
+</Project>

ChamomileСontracts/ChamomileTests/DataModelsTests/BuyerDataModelTests.cs

@@ -0,0 +1,68 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class BuyerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(null, "fio", "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(string.Empty, "fio", "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var buyer = CreateDataModel("id", "fio", "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FIOIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), null, "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "number");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsNullOrEmptyTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", null);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+        buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty);
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PhoneNumberIsIncorrectTest()
+    {
+        var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", "777");
+        Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var fio = "Fio";
+        var phoneNumber = "+7-777-777-77-77";
+        var buyer = CreateDataModel(buyerId, fio, phoneNumber);
+        Assert.That(() => buyer.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(buyer.Id, Is.EqualTo(buyerId));
+            Assert.That(buyer.FIO, Is.EqualTo(fio));
+            Assert.That(buyer.PhoneNumber, Is.EqualTo(phoneNumber));
+        });
+    }
+
+    private static BuyerDataModel CreateDataModel(string? id, string? fio, string? phoneNumber) =>
+        new(id, fio, phoneNumber);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/ComponentDataModelTests.cs

@@ -0,0 +1,91 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class ComponentDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var component = CreateDataModel(null, "name", ComponentType.Flower, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+        component = CreateDataModel(string.Empty, "name", ComponentType.Flower, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var component = CreateDataModel("id", "name", ComponentType.Flower, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentNameIsEmptyTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), null, ComponentType.Flower, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+        component = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, ComponentType.Flower, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentTypeIsNoneTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), null, ComponentType.None, Guid.NewGuid().ToString(), 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void componentSupplierIdIsNullOrEmptyTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Flower, null, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+        component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Flower, string.Empty, 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void componentSupplierIdIsNotGuidTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Flower, "manufacturerId", 10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PriceIsLessOrZeroTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Flower, Guid.NewGuid().ToString(), 0, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+        component = CreateDataModel(Guid.NewGuid().ToString(), "name", ComponentType.Flower, Guid.NewGuid().ToString(), -10, false);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var componentId = Guid.NewGuid().ToString();
+        var componentName = "name";
+        var componentType = ComponentType.Flower;
+        var componentSupplierId = Guid.NewGuid().ToString();
+        var componentPrice = 10;
+        var componentIsDelete = false;
+        var component = CreateDataModel(componentId, componentName, componentType, componentSupplierId, componentPrice, componentIsDelete);
+        Assert.That(() => component.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(component.Id, Is.EqualTo(componentId));
+            Assert.That(component.ComponentName, Is.EqualTo(componentName));
+            Assert.That(component.ComponentType, Is.EqualTo(componentType));
+            Assert.That(component.SupplierId, Is.EqualTo(componentSupplierId));
+            Assert.That(component.Price, Is.EqualTo(componentPrice));
+            Assert.That(component.IsDeleted, Is.EqualTo(componentIsDelete));
+        });
+    }
+
+    private static ComponentDataModel CreateDataModel(string? id, string? componentName, ComponentType componentType, string? supplierId, double price, bool isDeleted) =>
+        new(id, componentName, componentType, supplierId, price, isDeleted);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/ComponentHistoryDataModelTests.cs

@@ -0,0 +1,52 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class ComponentHistoryDataModelTests
+{
+    [Test]
+    public void ComponentIdIsNullOrEmptyTest()
+    {
+        var component = CreateDataModel(null, 10);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+        component = CreateDataModel(string.Empty, 10);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentIdIsNotGuidTest()
+    {
+        var component = CreateDataModel("id", 10);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void OldPriceIsLessOrZeroTest()
+    {
+        var component = CreateDataModel(Guid.NewGuid().ToString(), 0);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+        component = CreateDataModel(Guid.NewGuid().ToString(), -10);
+        Assert.That(() => component.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var componentId = Guid.NewGuid().ToString();
+        var oldPrice = 10;
+        var componentHistory = CreateDataModel(componentId, oldPrice);
+        Assert.That(() => componentHistory.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(componentHistory.ComponentId, Is.EqualTo(componentId));
+            Assert.That(componentHistory.OldPrice, Is.EqualTo(oldPrice));
+            Assert.That(componentHistory.ChangeDate, Is.LessThan(DateTime.UtcNow));
+            Assert.That(componentHistory.ChangeDate, Is.GreaterThan(DateTime.UtcNow.AddMinutes(-1)));
+        });
+    }
+
+    private static ComponentHistoryDataModel CreateDataModel(string? componentId, double oldPrice) =>
+        new(componentId, oldPrice);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/DiscountDataModelTests.cs

@@ -0,0 +1,48 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class DiscountDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var discount = CreateDataModel(null, 5, true);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+        discount = CreateDataModel(string.Empty, 5, true);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var discount = CreateDataModel("buyerId", 5, true);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DiscountSizeIsNegativeTest()
+    {
+        var discount = CreateDataModel("buyerId", -5, true);
+        Assert.That(() => discount.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    public void AllFieldsIsCorrectTest()
+    {
+        var buyerId = Guid.NewGuid().ToString();
+        var discountSize = 5;
+        var isActual = false;
+        var discount = CreateDataModel(buyerId, discountSize, isActual);
+        Assert.That(() => discount.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(discount.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(discount.DiscountSize, Is.EqualTo(discountSize));
+        });
+    }
+
+    private static DiscountDataModel CreateDataModel(string? buyerId, double discountSize,bool isActual) =>
+       new(buyerId, discountSize, isActual);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/PostDataModelTests.cs

@@ -0,0 +1,92 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class PostDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var post = CreateDataModel(null, Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var post = CreateDataModel("id", Guid.NewGuid().ToString(), "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullEmptyTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), null, "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), "postId", "name", PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostNameIsEmptyTest()
+    {
+        var manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), null, PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+        manufacturer = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), string.Empty, PostType.Assistant, 10, true, DateTime.UtcNow);
+        Assert.That(() => manufacturer.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostTypeIsNoneTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.None, 10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SalaryIsLessOrZeroTest()
+    {
+        var post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Assistant, 0, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+        post = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), "name", PostType.Assistant, -10, true, DateTime.UtcNow);
+        Assert.That(() => post.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var postId = Guid.NewGuid().ToString();
+        var postPostId = Guid.NewGuid().ToString();
+        var postName = "name";
+        var postType = PostType.Assistant;
+        var salary = 10;
+        var isActual = false;
+        var changeDate = DateTime.UtcNow.AddDays(-1);
+        var post = CreateDataModel(postId, postPostId, postName, postType, salary, isActual, changeDate);
+        Assert.That(() => post.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(post.Id, Is.EqualTo(postId));
+            Assert.That(post.PostId, Is.EqualTo(postPostId));
+            Assert.That(post.PostName, Is.EqualTo(postName));
+            Assert.That(post.PostType, Is.EqualTo(postType));
+            Assert.That(post.Salary, Is.EqualTo(salary));
+            Assert.That(post.IsActual, Is.EqualTo(isActual));
+            Assert.That(post.ChangeDate, Is.EqualTo(changeDate));
+        });
+    }
+    private static PostDataModel CreateDataModel(string? id, string? postId, string? postName, PostType postType, double salary, bool isActual, DateTime changeDate) =>
+      new(id, postId, postName, postType, salary, isActual, changeDate);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/SaleComponentDataModelTests.cs

@@ -0,0 +1,68 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class SaleComponentDataModelTests
+{
+    [Test]
+    public void SaleIdIsNullOrEmptyTest()
+    {
+        var saleComponent = CreateDataModel(null, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+        saleComponent = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SaleIdIsNotGuidTest()
+    {
+        var saleComponent = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentIdIsNullOrEmptyTest()
+    {
+        var saleComponent = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+        saleComponent = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentIdIsNotGuidTest()
+    {
+        var saleComponent = CreateDataModel(Guid.NewGuid().ToString(), "componentId", 10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void CountIsLessOrZeroTest()
+    {
+        var saleComponent = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+        saleComponent = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
+        Assert.That(() => saleComponent.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var componentId = Guid.NewGuid().ToString();
+        var count = 10;
+        var saleComponent = CreateDataModel(saleId, componentId, count);
+        Assert.That(() => saleComponent.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(saleComponent.SaleId, Is.EqualTo(saleId));
+            Assert.That(saleComponent.ComponentId, Is.EqualTo(componentId));
+            Assert.That(saleComponent.Count, Is.EqualTo(count));
+        });
+    }
+
+    private static SaleComponentDataModel CreateDataModel(string? saleId, string? componentId, int count) =>
+        new(saleId, componentId, count);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/SaleDataModelTests.cs

@@ -0,0 +1,112 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class SaleDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(null, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var sale = CreateDataModel("id", Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, 5,AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+    [Test]
+    public void WorkerIdIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), null, null, 10, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, Guid.NewGuid().ToString(), 10,5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void WorkerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), "workerId", Guid.NewGuid().ToString(), 10, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BuyerIdIsNotGuidTest()
+    {
+        var sale = CreateDataModel("buyerId", Guid.NewGuid().ToString(), "buyerId", 10, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SumIsLessOrZeroTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, 5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void DiscountIsNegative()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, -5, AssemblyType.Сomposition, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void ComponentsIsNullOrEmptyTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, 5, AssemblyType.Сomposition, false, null);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+        sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, 5, AssemblyType.Сomposition, false, []);
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AssemblyTypeIsNoneTest()
+    {
+        var sale = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, 5, AssemblyType.None, false, CreateSubDataModel());
+        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var saleId = Guid.NewGuid().ToString();
+        var workerId = Guid.NewGuid().ToString();
+        var buyerId = Guid.NewGuid().ToString();
+        var sum = 10;
+        var discount = 5;
+        var assemblyType = AssemblyType.Bouquet;
+        var isCancel = true;
+        var components = CreateSubDataModel();
+        var sale = CreateDataModel(saleId, workerId, buyerId, sum, discount, assemblyType, isCancel, components);
+        Assert.That(() => sale.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(sale.Id, Is.EqualTo(saleId));
+            Assert.That(sale.WorkerId, Is.EqualTo(workerId));
+            Assert.That(sale.BuyerId, Is.EqualTo(buyerId));
+            Assert.That(sale.Sum, Is.EqualTo(sum));
+            Assert.That(sale.Discount, Is.EqualTo(discount));
+            Assert.That(sale.AssemblyType, Is.EqualTo(assemblyType));
+            Assert.That(sale.Discount, Is.EqualTo(discount));
+            Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
+            Assert.That(sale.Components, Is.EquivalentTo(components));
+        });
+    }
+
+    private static SaleDataModel CreateDataModel(string? id, string? workerId, string? buyerId, double sum, double discount, AssemblyType assemblyType, bool isCancel, List<SaleComponentDataModel> components) =>
+        new(id, workerId, buyerId, sum, discount, assemblyType, isCancel, components);
+
+    private static List<SaleComponentDataModel> CreateSubDataModel()
+        => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/SupplierDataModelTests.cs

@@ -0,0 +1,50 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class SupplierDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var supplier = CreateDataModel(null, "name");
+        Assert.That(() => supplier.Validate(), Throws.TypeOf<ValidationException>());
+        supplier = CreateDataModel(string.Empty, "name");
+        Assert.That(() => supplier.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var supplier = CreateDataModel("id", "name");
+        Assert.That(() => supplier.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void SupplierNameIsNullOrEmptyTest()
+    {
+        var supplier = CreateDataModel(Guid.NewGuid().ToString(), null);
+        Assert.That(() => supplier.Validate(), Throws.TypeOf<ValidationException>());
+        supplier = CreateDataModel(Guid.NewGuid().ToString(), string.Empty);
+        Assert.That(() => supplier.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var supplierId = Guid.NewGuid().ToString();
+        var supplierName = "name";
+        var supplier = CreateDataModel(supplierId, supplierName);
+        Assert.That(() => supplier.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(supplier.Id, Is.EqualTo(supplierId));
+            Assert.That(supplier.SupplierName, Is.EqualTo(supplierName));
+        });
+    }
+
+    private static SupplierDataModel CreateDataModel(string? id, string? supplierName, string? prevSupplierName = null, string? prevPrevSupplierName = null) =>
+        new(id, supplierName, prevSupplierName, prevPrevSupplierName);
+}

ChamomileСontracts/ChamomileTests/DataModelsTests/WorkerDataModelTests.cs

@@ -0,0 +1,88 @@
+using ChamomileСontracts.DataModels;
+using ChamomileСontracts.Exceptions;
+
+namespace ChamomileTests.DataModelsTests;
+
+[TestFixture]
+internal class WorkerDataModelTests
+{
+    [Test]
+    public void IdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(null, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(string.Empty, "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void IdIsNotGuidTest()
+    {
+        var worker = CreateDataModel("id", "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void FioIsNotFullNameEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "аап пав", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNullOrEmptyTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void PostIdIsNotGuidTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", "postId", DateTime.Now.AddYears(-18), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(1), DateTime.Now, false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void BirthDateAndEmploymentDateIsNotCorrectTest()
+    {
+        var worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-18).AddDays(-1), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+        worker = CreateDataModel(Guid.NewGuid().ToString(), "fio", Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18), DateTime.Now.AddYears(-16), false);
+        Assert.That(() => worker.Validate(), Throws.TypeOf<ValidationException>());
+    }
+
+    [Test]
+    public void AllFieldsIsCorrectTest()
+    {
+        var workerId = Guid.NewGuid().ToString();
+        var fio = "Фамилия Имя Отчество";
+        var postId = Guid.NewGuid().ToString();
+        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var employmentDate = DateTime.Now;
+        var isDelete = false;
+        var worker = CreateDataModel(workerId, fio, postId, birthDate, employmentDate, isDelete);
+        Assert.That(() => worker.Validate(), Throws.Nothing);
+        Assert.Multiple(() =>
+        {
+            Assert.That(worker.Id, Is.EqualTo(workerId));
+            Assert.That(worker.FIO, Is.EqualTo(fio));
+            Assert.That(worker.PostId, Is.EqualTo(postId));
+            Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
+            Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
+            Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
+        });
+    }
+
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
+        new(id, fio, postId, birthDate, employmentDate, isDeleted);
+}

ChamomileСontracts/ChamomileСontracts.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 17.12.35707.178 d17.12
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChamomileСontracts", "ChamomileСontracts\ChamomileСontracts.csproj", "{308A7586-A19E-4565-B0DF-7CC73FA7790C}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChamomileTests", "ChamomileTests\ChamomileTests.csproj", "{4BB61363-9D2A-4A9D-90D0-8162B0B40DC5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{308A7586-A19E-4565-B0DF-7CC73FA7790C}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{308A7586-A19E-4565-B0DF-7CC73FA7790C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{308A7586-A19E-4565-B0DF-7CC73FA7790C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4BB61363-9D2A-4A9D-90D0-8162B0B40DC5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4BB61363-9D2A-4A9D-90D0-8162B0B40DC5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4BB61363-9D2A-4A9D-90D0-8162B0B40DC5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4BB61363-9D2A-4A9D-90D0-8162B0B40DC5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

ChamomileСontracts/ChamomileСontracts/DataModels/BuyerDataModel.cs

@@ -0,0 +1,34 @@
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+using System.Text.RegularExpressions;
+
+namespace ChamomileСontracts.DataModels;
+
+public class BuyerDataModel(string id, string fio, string phoneNumber) : IValidation
+{
+    public string Id { get; private set; } = id; // Чтобы не переводить в GUID и UUID представляем в виде строки
+
+    public string FIO { get; private set; } = fio;
+
+    public string PhoneNumber { get; private set; } = phoneNumber;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (FIO.IsEmpty())
+            throw new ValidationException("Field FIO is empty");
+
+        if (PhoneNumber.IsEmpty())
+            throw new ValidationException("Field PhoneNumber is empty");
+
+        //проверочное выражение на номер телефона
+        if (!Regex.IsMatch(PhoneNumber, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+    }
+}

ChamomileСontracts/ChamomileСontracts/DataModels/ComponentDataModel.cs

@@ -0,0 +1,45 @@
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class ComponentDataModel(string id, string componentName, ComponentType componentType, string supplierId, double price, bool isDeleted) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string ComponentName { get; private set; } = componentName;
+
+    public ComponentType ComponentType { get; private set; } = componentType;
+
+    public string SupplierId { get; private set; } = supplierId;
+
+    public double Price { get; private set; } = price;
+
+    public bool IsDeleted { get; private set; } = isDeleted;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (ComponentName.IsEmpty())
+            throw new ValidationException("Field ComponentName is empty");
+
+        if (ComponentType == ComponentType.None)
+            throw new ValidationException("Field ComponentType is empty");
+
+        if (SupplierId.IsEmpty())
+            throw new ValidationException("Field SupplierId is empty");
+
+        if (!SupplierId.IsGuid())
+            throw new ValidationException("The value in the field SupplierId is not a unique identifier");
+
+        if (Price <= 0)
+            throw new ValidationException("Field Price is less than or equal to 0");
+    }
+}

ChamomileСontracts/ChamomileСontracts/DataModels/ComponentHistoryDataModel.cs

@@ -0,0 +1,27 @@
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class ComponentHistoryDataModel(string componentId, double oldPrice) : IValidation
+{
+	public string ComponentId { get; private set; } = componentId;
+
+	public double OldPrice { get; private set; } = oldPrice;
+
+	//дата изменения 
+	public DateTime ChangeDate { get; private set; } = DateTime.UtcNow;
+
+	public void Validate()
+	{
+		if (ComponentId.IsEmpty())
+			throw new ValidationException("Field ComponentId is empty");
+
+		if (!ComponentId.IsGuid())
+			throw new ValidationException("The value in the field ComponentId is not a unique identifier");
+
+		if (OldPrice <= 0)
+			throw new ValidationException("Field OldPrice is less than or equal to 0");
+	}
+}

ChamomileСontracts/ChamomileСontracts/DataModels/DiscountDataModel.cs

@@ -0,0 +1,28 @@
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class DiscountDataModel(string buyerId, double discountSize, bool isActual) : IValidation
+{
+	public string BuyerId { get; private set; } = buyerId;
+
+    public double DiscountSize { get; private set; } = discountSize;
+
+    //признак актуальности
+    public bool IsActual { get; private set; } = isActual;
+
+    public void Validate()
+	{
+		if (BuyerId.IsEmpty())
+			throw new ValidationException("Field WorkerId is empty");
+
+		if (!BuyerId.IsGuid())
+			throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+
+        if (DiscountSize < 0)
+            throw new ValidationException("Field DiscountSize cannot be negative");
+    }
+}

ChamomileСontracts/ChamomileСontracts/DataModels/PostDataModel.cs

@@ -0,0 +1,50 @@
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class PostDataModel(string id, string postId, string postName, PostType postType, double salary, bool isActual, DateTime changeDate) : IValidation
+{
+	public string Id { get; private set; } = id;
+
+	public string PostId { get; private set; } = postId;
+
+	public string PostName { get; private set; } = postName;
+
+	public PostType PostType { get; private set; } = postType;
+
+	//зарплата
+	public double Salary { get; private set; } = salary;
+
+	//признак актуальности
+	public bool IsActual { get; private set; } = isActual;
+
+	//дата изменения
+	public DateTime ChangeDate { get; private set; } = changeDate;
+
+	public void Validate()
+	{
+		if (Id.IsEmpty())
+			throw new ValidationException("Field Id is empty");
+
+		if (!Id.IsGuid())
+			throw new ValidationException("The value in the field Id is not a unique identifier");
+
+		if (PostId.IsEmpty())
+			throw new ValidationException("Field PostId is empty");
+
+		if (!PostId.IsGuid())
+			throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+		if (PostName.IsEmpty())
+			throw new ValidationException("Field PostName is empty");
+
+		if (PostType == PostType.None)
+			throw new ValidationException("Field PostType is empty");
+
+		if (Salary <= 0)
+			throw new ValidationException("Field Salary is empty");
+	}
+}

ChamomileСontracts/ChamomileСontracts/DataModels/SaleComponentDataModel.cs

@@ -0,0 +1,32 @@
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class SaleComponentDataModel(string saleId, string componentId, int count) : IValidation
+{
+	public string SaleId { get; private set; } = saleId;
+
+	public string ComponentId { get; private set; } = componentId;
+
+	public int Count { get; private set; } = count;
+
+	public void Validate()
+	{
+		if (SaleId.IsEmpty())
+			throw new ValidationException("Field SaleId is empty");
+
+		if (!SaleId.IsGuid())
+			throw new ValidationException("The value in the field SaleId is not a unique identifier");
+
+		if (ComponentId.IsEmpty())
+			throw new ValidationException("Field ComponentId is empty");
+
+		if (!ComponentId.IsGuid())
+			throw new ValidationException("The value in the field ComponentId is not a unique identifier");
+
+		if (Count <= 0)
+			throw new ValidationException("Field Count is less than or equal to 0");
+	}
+}

ChamomileСontracts/ChamomileСontracts/DataModels/SaleDataModel.cs

@@ -0,0 +1,59 @@
+using ChamomileСontracts.Enums;
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class SaleDataModel(string id, string workerId, string? buyerId, double sum, double discount, AssemblyType assemblyType, bool isCancel, List<SaleComponentDataModel> components) : IValidation
+{
+	public string Id { get; private set; } = id;
+
+	public string WorkerId { get; private set; } = workerId;
+
+	public string? BuyerId { get; private set; } = buyerId;
+
+    public double Sum { get; private set; } = sum;
+
+    public double Discount { get; private set; } = discount;
+
+    public AssemblyType AssemblyType { get; private set; } = assemblyType;
+
+    public DateTime SaleDate { get; private set; } = DateTime.UtcNow;
+
+	public bool IsCancel { get; private set; } = isCancel;
+
+	public List<SaleComponentDataModel> Components { get; private set; } = components;
+
+	public void Validate()
+	{
+		if (Id.IsEmpty())
+			throw new ValidationException("Field Id is empty");
+
+		if (!Id.IsGuid())
+			throw new ValidationException("The value in the field Id is not a unique identifier");
+
+		if (WorkerId.IsEmpty())
+			throw new ValidationException("Field WorkerId is empty");
+
+		if (!WorkerId.IsGuid())
+			throw new ValidationException("The value in the field WorkerId is not a unique identifier");
+
+		if (!BuyerId?.IsGuid() ?? !BuyerId?.IsEmpty() ?? false)
+			throw new ValidationException("The value in the field BuyerId is not a unique identifier");
+
+        if (Sum <= 0)
+			throw new ValidationException("Field Sum is less than or equal to 0");
+
+        if (Discount < 0)
+            throw new ValidationException("Field Discount cannot be negative");
+
+        if ((Components?.Count ?? 0) == 0)
+			throw new ValidationException("The sale must include components");
+
+
+        if (AssemblyType == AssemblyType.None)
+            throw new ValidationException("Field AssemblyType is empty");
+
+    }
+}

ChamomileСontracts/ChamomileСontracts/DataModels/SupplierDataModel.cs

@@ -0,0 +1,28 @@
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+
+namespace ChamomileСontracts.DataModels;
+
+public class SupplierDataModel(string id, string supplierName, string? prevSupplierName, string? prevPrevSupplierName) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string SupplierName { get; private set; } = supplierName;
+
+    public string? PrevSupplierName { get; private set; } = prevSupplierName;
+
+    public string? PrevPrevSupplierName { get; private set; } = prevPrevSupplierName;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+            throw new ValidationException("Field Id is empty");
+
+        if (!Id.IsGuid())
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (SupplierName.IsEmpty())
+            throw new ValidationException("Field SupplierName is empty");
+    }
+}

ChamomileСontracts/ChamomileСontracts/DataModels/WorkerDataModel.cs

@@ -0,0 +1,50 @@
+using ChamomileСontracts.Exceptions;
+using ChamomileСontracts.Extensions;
+using ChamomileСontracts.Infrastructure;
+using System.Text.RegularExpressions;
+
+namespace ChamomileСontracts.DataModels;
+
+public class WorkerDataModel(string id, string fio, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) : IValidation
+{
+	public string Id { get; private set; } = id;
+
+	public string FIO { get; private set; } = fio;
+
+	public string PostId { get; private set; } = postId;
+
+    public DateTime BirthDate { get; private set; } = birthDate;
+
+	//дата трудоустройства
+	public DateTime EmploymentDate { get; private set; } = employmentDate;
+
+	public bool IsDeleted { get; private set; } = isDeleted;
+
+	public void Validate()
+	{
+		if (Id.IsEmpty())
+			throw new ValidationException("Field Id is empty");
+
+		if (!Id.IsGuid())
+			throw new ValidationException("The value in the field Id is not a unique identifier");
+
+        if (!Regex.IsMatch(FIO, @"^([А-ЯЁ][а-яё]+)\s+([А-ЯЁ][а-яё]+)\s+([А-ЯЁ][а-яё]+)$"))
+            throw new ValidationException("Field FIO is not a full name");
+
+        if (PostId.IsEmpty())
+			throw new ValidationException("Field PostId is empty");
+
+		if (!PostId.IsGuid())
+			throw new ValidationException("The value in the field PostId is not a unique identifier");
+
+        if (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
+			throw new ValidationException($"Minors cannot be hired (BirthDate = {BirthDate.ToShortDateString()})");
+
+		if (EmploymentDate.Date < BirthDate.Date)
+			throw new ValidationException("The date of employment cannot be less than the date of birth");
+
+		if ((EmploymentDate - BirthDate).TotalDays / 365 < 16) // EmploymentDate.Year - BirthDate.Year
+			throw new ValidationException($"Minors cannot be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
+
+    }
+}

ChamomileСontracts/ChamomileСontracts/Enums/AssemblyType.cs

@@ -0,0 +1,9 @@
+namespace ChamomileСontracts.Enums;
+
+[Flags]
+public enum AssemblyType // тип сборки
+{
+	None = 0,
+	Bouquet = 1, //букет
+    Сomposition = 2 // композиция
+}

ChamomileСontracts/ChamomileСontracts/Enums/ComponentType.cs

@@ -0,0 +1,9 @@
+namespace ChamomileСontracts.Enums;
+
+public enum ComponentType
+{
+    None = 0,
+    Flower = 1,
+    Decor = 2,
+    СareСhemistry = 3 //химимя для ухода за цветами
+}

ChamomileСontracts/ChamomileСontracts/Enums/PostType.cs

@@ -0,0 +1,9 @@
+namespace ChamomileСontracts.Enums;
+
+public enum PostType
+{
+    None = 0,
+    Administrator = 1,
+    Florist = 2,
+    Assistant = 3 //подсобный рабочий
+}

ChamomileСontracts/ChamomileСontracts/Exceptions/ValidationException.cs

@@ -0,0 +1,5 @@
+namespace ChamomileСontracts.Exceptions;
+
+public class ValidationException(string massege) : Exception(massege) 
+{
+}

ChamomileСontracts/ChamomileСontracts/Extensions/StringExtensions.cs

@@ -0,0 +1,16 @@
+namespace ChamomileСontracts.Extensions;
+
+public static class StringExtensions
+{
+    //строка пуста
+    public static bool IsEmpty(this string str)
+    {
+        return string.IsNullOrWhiteSpace(str);
+    }
+
+    //строка представляет собой Guid выражение (128-битное число, используемое для уникальной идентификации информации в компьютерных системах)
+    public static bool IsGuid(this string str)
+    {
+        return Guid.TryParse(str, out _);
+    }
+}

ChamomileСontracts/ChamomileСontracts/Infrastructure/IValidation.cs

@@ -0,0 +1,6 @@
+namespace ChamomileСontracts.Infrastructure;
+
+public interface IValidation
+{
+    void Validate();
+}