PnvPanel/backend/tests/PnvPanel.Application.Tests/Telegram/UnlinkTelegramCommandHandlerTests.cs

using NSubstitute;
using PnvPanel.Application.Auth;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Models;
using PnvPanel.Application.Telegram;
using PnvPanel.Application.Tests.TestSupport;
using Xunit;

namespace PnvPanel.Application.Tests.Telegram;

public class UnlinkTelegramCommandHandlerTests
{
    private readonly IIdentityService _identityService = Substitute.For<IIdentityService>();

    [Fact]
    public async Task Handle_WhenAuthenticated_DelegatesToIdentityService()
    {
        var userId = Guid.NewGuid();
        _identityService
            .UnlinkTelegramAsync(userId, Arg.Any<CancellationToken>())
            .Returns(Result.Success());

        var handler = new UnlinkTelegramCommandHandler(
            _identityService,
            FakeCurrentUser.Authenticated(userId)
        );

        var result = await handler.Handle(new UnlinkTelegramCommand(), CancellationToken.None);

        Assert.True(result.IsSuccess);
        await _identityService
            .Received(1)
            .UnlinkTelegramAsync(userId, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenNotAuthenticated_ReturnsUnauthorized()
    {
        var handler = new UnlinkTelegramCommandHandler(
            _identityService,
            FakeCurrentUser.Anonymous()
        );

        var result = await handler.Handle(new UnlinkTelegramCommand(), CancellationToken.None);

        Assert.False(result.IsSuccess);
        Assert.Equal(AuthErrors.Unauthorized, result.Error);
        await _identityService
            .DidNotReceive()
            .UnlinkTelegramAsync(Arg.Any<Guid>(), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_WhenIdentityServiceFails_PropagatesFailure()
    {
        var userId = Guid.NewGuid();
        var error = TelegramErrors.NotLinked;
        _identityService
            .UnlinkTelegramAsync(userId, Arg.Any<CancellationToken>())
            .Returns(Result.Failure(error));

        var handler = new UnlinkTelegramCommandHandler(
            _identityService,
            FakeCurrentUser.Authenticated(userId)
        );

        var result = await handler.Handle(new UnlinkTelegramCommand(), CancellationToken.None);

        Assert.False(result.IsSuccess);
        Assert.Equal(error, result.Error);
    }
}