Refactor message service and move tests to Application.Tests

Renamed IMessageService to IMessageCommandService and updated all usages accordingly. Moved and renamed test files from Govor.API.Tests to the new Govor.Application.Tests project, updating namespaces to match. Refactored message-related services and controllers to use the new naming and structure. Added Govor.Application.Tests project to the solution.

Govor.Application.Tests/Services/Authentication/JwtServiceTests.cs

@@ -0,0 +1,60 @@
+using System.IdentityModel.Tokens.Jwt;
+using AutoFixture;
+using Govor.API.Services.Authentication.Interfaces;
+using Govor.Application.Services;
+using Govor.Application.Services.Authentication;
+using Govor.Core.Models;
+using Microsoft.Extensions.Options;
+using Moq;
+
+namespace Govor.Application.Tests.Services.Authentication;
+
+[TestFixture]
+public class JwtServiceTests
+{
+    private Fixture _fixture;
+    private Mock<IOptions<JwtOption>> _jwtOptionsMock;
+    private Mock<IInvitesService> _invitesServiceMock;
+    private IJwtService _jwtService;
+
+    private JwtOption _testJwtOptions;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _fixture = new Fixture();
+        _fixture.Behaviors.OfType<ThrowingRecursionBehavior>().ToList().ForEach(b => _fixture.Behaviors.Remove(b));
+        _fixture.Behaviors.Add(new OmitOnRecursionBehavior());
+
+        _testJwtOptions = new JwtOption
+        {
+            SecretKeу = "THIS IS A TEST SECRET KEY THAT IS LONG ENOUGH", // Ensure key size is sufficient for HMACSHA256
+            Hours = 1
+        };
+
+        _jwtOptionsMock = new Mock<IOptions<JwtOption>>();
+        _jwtOptionsMock.Setup(o => o.Value).Returns(_testJwtOptions);
+
+        _invitesServiceMock = new Mock<IInvitesService>();
+        
+        _jwtService = new JwtService(_jwtOptionsMock.Object, _invitesServiceMock.Object);
+    }
+
+    [Test]
+    public async Task GenerateJwtToken_ShouldReturnValidJwtString()
+    {
+        // Arrange
+        var user = _fixture.Create<User>();
+        var expectedRole = "User";
+        _invitesServiceMock.Setup(s => s.GetRoleAsync(user)).Returns(Task.FromResult(expectedRole));
+        // Act 
+        var tokenString = await _jwtService.GenerateJwtTokenAsync(user);
+
+        // Assert
+        Assert.That(tokenString, Is.Not.Null.And.Not.Empty);
+        
+        // Attempt to parse the token to ensure it's a JWT
+        var handler = new JwtSecurityTokenHandler();
+        Assert.DoesNotThrow(() => handler.ReadJwtToken(tokenString));
+    }
+}