refactor: remove exceptions and tests

Author: nadirbad

Directory.Packages.props

@@ -28,5 +28,6 @@
         <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.6" />
         <PackageVersion Include="coverlet.collector" Version="6.0.0" />
         <PackageVersion Include="Moq" Version="4.16.1" />
+        <PackageVersion Include="NSubstitute" Version="5.1.0" />
     </ItemGroup>
 </Project>

src/Api/Filters/ApiExceptionFilterAttribute.cs

@@ -8,6 +8,7 @@
   <ItemGroup>
     <PackageReference Include="FluentAssertions" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="NSubstitute" />
     <PackageReference Include="xunit" />
     <PackageReference Include="xunit.runner.visualstudio">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

src/Application/Common/Exceptions/ForbiddenAccessException.cs

@@ -0,0 +1,84 @@
+using FluentValidation;
+using FluentValidation.Results;
+
+using MediatR;
+
+using VerticalSliceArchitecture.Application.Common.Behaviours;
+using VerticalSliceArchitecture.Application.Domain.Todos;
+using VerticalSliceArchitecture.Application.Features.TodoLists;
+
+namespace VerticalSliceArchitecture.Application.UnitTests.Common.Behaviours;
+
+public class ValidationBehaviorTests
+{
+    private readonly ValidationBehavior<CreateTodoListCommand, ErrorOr<int>> _validationBehavior;
+    private readonly IValidator<CreateTodoListCommand> _mockValidator;
+    private readonly RequestHandlerDelegate<ErrorOr<int>> _mockNextBehavior;
+
+    public ValidationBehaviorTests()
+    {
+        _mockNextBehavior = Substitute.For<RequestHandlerDelegate<ErrorOr<int>>>();
+        _mockValidator = Substitute.For<IValidator<CreateTodoListCommand>>();
+
+        _validationBehavior = new(_mockValidator);
+    }
+
+    [Fact]
+    public async Task InvokeValidationBehavior_WhenValidatorResultIsValid_ShouldInvokeNextBehavior()
+    {
+        // Arrange
+        var createTodoListCommand = new CreateTodoListCommand("Title");
+        var todoList = new TodoList { Title = createTodoListCommand.Title };
+
+        _mockValidator
+            .ValidateAsync(createTodoListCommand, Arg.Any<CancellationToken>())
+            .Returns(new ValidationResult());
+
+        _mockNextBehavior.Invoke().Returns(todoList.Id);
+
+        // Act
+        var result = await _validationBehavior.Handle(createTodoListCommand, _mockNextBehavior, default);
+
+        // Assert
+        result.IsError.Should().BeFalse();
+        result.Value.Should().Be(todoList.Id);
+    }
+
+    [Fact]
+    public async Task InvokeValidationBehavior_WhenValidatorResultIsNotValid_ShouldReturnListOfErrors()
+    {
+        // Arrange
+        var createTodoListCommand = new CreateTodoListCommand("Title");
+        List<ValidationFailure> validationFailures = [new(propertyName: "foo", errorMessage: "bad foo")];
+
+        _mockValidator
+            .ValidateAsync(createTodoListCommand, Arg.Any<CancellationToken>())
+            .Returns(new ValidationResult(validationFailures));
+
+        // Act
+        var result = await _validationBehavior.Handle(createTodoListCommand, _mockNextBehavior, default);
+
+        // Assert
+        result.IsError.Should().BeTrue();
+        result.FirstError.Code.Should().Be("foo");
+        result.FirstError.Description.Should().Be("bad foo");
+    }
+
+    [Fact]
+    public async Task InvokeValidationBehavior_WhenNoValidator_ShouldInvokeNextBehavior()
+    {
+        // Arrange
+        var createTodoListCommand = new CreateTodoListCommand("Title");
+        var validationBehavior = new ValidationBehavior<CreateTodoListCommand, ErrorOr<int>>();
+
+        var todoList = new TodoList { Title = createTodoListCommand.Title };
+        _mockNextBehavior.Invoke().Returns(todoList.Id);
+
+        // Act
+        var result = await validationBehavior.Handle(createTodoListCommand, _mockNextBehavior, default);
+
+        // Assert
+        result.IsError.Should().BeFalse();
+        result.Value.Should().Be(todoList.Id);
+    }
+}

src/Application/Common/Exceptions/NotFoundException.cs

@@ -1,3 +1,7 @@
+global using ErrorOr;
+
 global using FluentAssertions;
 
+global using NSubstitute;
+
 global using Xunit;