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/Infrastructure/AdminsStuff/InvitationGeneratorTests.cs

@@ -0,0 +1,89 @@
+using AutoFixture;
+using Govor.API.Services.AdminsStuff.Interfaces;
+using Govor.Application.Infrastructure.AdminsStuff;
+using Govor.Core.Models;
+using Govor.Core.Repositories.Invaites;
+using Moq;
+
+namespace Govor.Application.Tests.Infrastructure.AdminsStuff;
+
+[TestFixture]
+public class InvitationGeneratorTests
+{
+    private Fixture _fixture;
+    private Mock<IInvitesRepository> _invitesRepositoryMock;
+    private IInvitationGenerator _invitationGenerator;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _fixture = new Fixture();
+        _fixture.Behaviors.OfType<ThrowingRecursionBehavior>().ToList().ForEach(b => _fixture.Behaviors.Remove(b));
+        _fixture.Behaviors.Add(new OmitOnRecursionBehavior());
+
+        _invitesRepositoryMock = new Mock<IInvitesRepository>();
+        _invitationGenerator = new InvitationGenerator(_invitesRepositoryMock.Object);
+    }
+    
+    [Test]
+    public async Task GenerateInvitationCode_ShouldReturnNonEmptyString_WhenCalled()
+    {
+        // Arrange
+        var endDate = _fixture.Create<DateTime>();
+        var maxUsers = _fixture.Create<int>();
+        var isAdmin = _fixture.Create<bool>();
+        var description = _fixture.Create<string>();
+
+        // Act
+        var code = await _invitationGenerator.GenerateInvitationCode(endDate, maxUsers, isAdmin, description);
+
+        // Assert
+        Assert.That(code, Is.Not.Null.And.Not.Empty);
+    }
+    
+
+    [Test]
+    public async Task GenerateInvitationCode_ShouldCallAddAsyncOnRepository_WithCorrectInvitation()
+    {
+        // Arrange
+        var endDate = DateTime.UtcNow.AddDays(7); // Specific date for easier assertion if needed
+        var maxUsers = 10;
+        var isAdmin = false;
+        var description = "Test Invitation";
+        Invitation capturedInvitation = null;
+
+        _invitesRepositoryMock.Setup(repo => repo.AddAsync(It.IsAny<Invitation>()))
+            .Callback<Invitation>(inv => capturedInvitation = inv)
+            .Returns(Task.CompletedTask);
+
+        // Act
+        var code = await _invitationGenerator.GenerateInvitationCode(endDate, maxUsers, isAdmin, description);
+
+        // Assert
+        _invitesRepositoryMock.Verify(repo => repo.AddAsync(It.IsAny<Invitation>()), Times.Once);
+        Assert.That(capturedInvitation, Is.Not.Null);
+        Assert.That(capturedInvitation.EndDate.ToUniversalTime(), Is.EqualTo(endDate.ToUniversalTime()));
+        Assert.That(capturedInvitation.MaxParticipants, Is.EqualTo(maxUsers));
+        Assert.That(capturedInvitation.IsAdmin, Is.EqualTo(isAdmin));
+        Assert.That(capturedInvitation.Description, Is.EqualTo(description));
+        Assert.That(capturedInvitation.Code, Is.EqualTo(code));
+        Assert.That(capturedInvitation.IsActive, Is.True); // Assuming new invitations are active by default
+    }
+    
+    [Test]
+    public async Task GenerateInvitationCode_ShouldGenerateUniqueCode_WhenCalled()
+    {
+        // Arrange
+        var endDate = _fixture.Create<DateTime>();
+        var maxUsers = _fixture.Create<int>();
+        var isAdmin = _fixture.Create<bool>();
+        var description = _fixture.Create<string>();
+
+        // Act
+        var code1 = await _invitationGenerator.GenerateInvitationCode(endDate, maxUsers, isAdmin, description);
+        var code2 = await _invitationGenerator.GenerateInvitationCode(endDate, maxUsers, isAdmin, description);
+
+        // Assert
+        Assert.That(code1, Is.Not.EqualTo(code2));
+    }
+}