SIG-CM2.0/tests/SIGCM2.Application.Tests/Roles/Create/CreateRolCommandHandlerTests.cs

using NSubstitute;
using SIGCM2.Application.Abstractions.Persistence;
using SIGCM2.Application.Roles.Create;
using SIGCM2.Domain.Entities;
using SIGCM2.Domain.Exceptions;

namespace SIGCM2.Application.Tests.Roles.Create;

public class CreateRolCommandHandlerTests
{
    private readonly IRolRepository _repository = Substitute.For<IRolRepository>();
    private readonly CreateRolCommandHandler _handler;

    private static CreateRolCommand ValidCommand() => new("cajero_senior", "Cajero Senior", "Con más permisos");

    public CreateRolCommandHandlerTests()
    {
        _handler = new CreateRolCommandHandler(_repository);
    }

    [Fact]
    public async Task Handle_CodigoDuplicado_ThrowsRolAlreadyExistsException()
    {
        var now = new DateTime(2026, 4, 15, 10, 0, 0, DateTimeKind.Utc);
        _repository.GetByCodigoAsync("cajero_senior")
            .Returns(new Rol(99, "cajero_senior", "Cajero Senior", null, true, now, null));

        var ex = await Assert.ThrowsAsync<RolAlreadyExistsException>(
            () => _handler.Handle(ValidCommand()));

        Assert.Equal("cajero_senior", ex.Codigo);
    }

    [Fact]
    public async Task Handle_CodigoDuplicado_DoesNotCallAddAsync()
    {
        var now = new DateTime(2026, 4, 15, 10, 0, 0, DateTimeKind.Utc);
        _repository.GetByCodigoAsync(Arg.Any<string>())
            .Returns(new Rol(1, "cajero_senior", "X", null, true, now, null));

        try { await _handler.Handle(ValidCommand()); } catch (RolAlreadyExistsException) { }

        await _repository.DidNotReceive().AddAsync(Arg.Any<Rol>(), Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_Happy_AddsAndReturnsDtoWithId()
    {
        _repository.GetByCodigoAsync(Arg.Any<string>()).Returns((Rol?)null);
        _repository.AddAsync(Arg.Any<Rol>(), Arg.Any<CancellationToken>()).Returns(42);

        var result = await _handler.Handle(ValidCommand());

        Assert.Equal(42, result.Id);
        Assert.Equal("cajero_senior", result.Codigo);
        Assert.Equal("Cajero Senior", result.Nombre);
        Assert.Equal("Con más permisos", result.Descripcion);
        Assert.True(result.Activo);
    }

    [Fact]
    public async Task Handle_Happy_CallsAddAsyncOnce()
    {
        _repository.GetByCodigoAsync(Arg.Any<string>()).Returns((Rol?)null);
        _repository.AddAsync(Arg.Any<Rol>(), Arg.Any<CancellationToken>()).Returns(5);

        await _handler.Handle(ValidCommand());

        await _repository.Received(1).AddAsync(
            Arg.Is<Rol>(r => r.Codigo == "cajero_senior" && r.Nombre == "Cajero Senior" && r.Activo),
            Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_Happy_WithNullDescripcion_PassesNullToRepository()
    {
        _repository.GetByCodigoAsync(Arg.Any<string>()).Returns((Rol?)null);
        _repository.AddAsync(Arg.Any<Rol>(), Arg.Any<CancellationToken>()).Returns(1);

        await _handler.Handle(new CreateRolCommand("nuevo_rol", "Nuevo", null));

        await _repository.Received(1).AddAsync(
            Arg.Is<Rol>(r => r.Descripcion == null),
            Arg.Any<CancellationToken>());
    }
}