SIG-CM2.0/tests/SIGCM2.Application.Tests/Usuarios/ChangeMyPasswordCommandHandlerTests.cs

using NSubstitute;
using SIGCM2.Application.Abstractions.Persistence;
using SIGCM2.Application.Abstractions.Security;
using SIGCM2.Application.Audit;
using SIGCM2.Application.Usuarios.ChangeMyPassword;
using SIGCM2.Domain.Entities;
using SIGCM2.Domain.Exceptions;

namespace SIGCM2.Application.Tests.Usuarios;

public class ChangeMyPasswordCommandHandlerTests
{
    private readonly IUsuarioRepository _repo = Substitute.For<IUsuarioRepository>();
    private readonly IPasswordHasher _hasher = Substitute.For<IPasswordHasher>();
    private readonly IRefreshTokenRepository _refreshRepo = Substitute.For<IRefreshTokenRepository>();
    private readonly IAuditLogger _audit = Substitute.For<IAuditLogger>();
    private readonly ChangeMyPasswordCommandHandler _handler;

    public ChangeMyPasswordCommandHandlerTests()
    {
        _handler = new ChangeMyPasswordCommandHandler(_repo, _hasher, _audit);
    }

    private static Usuario MakeUser(int id = 1, bool mustChangePassword = false)
        => new(id, "user" + id, "$2a$12$oldhash", "Test", "User", null, "cajero", "[]", true,
            mustChangePassword: mustChangePassword);

    [Fact]
    public async Task Handle_Happy_Path_Hashes_New_Password_Clears_MustChange()
    {
        var user = MakeUser(1, mustChangePassword: true);
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(user);
        _hasher.Verify("oldPass1!", "$2a$12$oldhash").Returns(true);
        _hasher.Hash("newPass2!").Returns("$2a$12$newhash");

        await _handler.Handle(new ChangeMyPasswordCommand(1, "oldPass1!", "newPass2!"));

        await _repo.Received(1).UpdatePasswordAsync(1, "$2a$12$newhash", false, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task Handle_Throws_InvalidOldPasswordException_When_Wrong_Old()
    {
        var user = MakeUser(1);
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(user);
        _hasher.Verify(Arg.Any<string>(), Arg.Any<string>()).Returns(false);

        await Assert.ThrowsAsync<InvalidOldPasswordException>(
            () => _handler.Handle(new ChangeMyPasswordCommand(1, "wrongPass!", "newPass2!")));
    }

    [Fact]
    public async Task Handle_Throws_UsuarioNotFoundException_When_Not_Found()
    {
        _repo.GetByIdAsync(9999, Arg.Any<CancellationToken>()).Returns((Usuario?)null);

        await Assert.ThrowsAsync<UsuarioNotFoundException>(
            () => _handler.Handle(new ChangeMyPasswordCommand(9999, "old", "new1234")));
    }

    [Fact]
    public async Task Handle_Does_NOT_Revoke_Own_Refresh_Tokens()
    {
        var user = MakeUser(1);
        _repo.GetByIdAsync(1, Arg.Any<CancellationToken>()).Returns(user);
        _hasher.Verify(Arg.Any<string>(), Arg.Any<string>()).Returns(true);
        _hasher.Hash(Arg.Any<string>()).Returns("$2a$12$newhash");

        await _handler.Handle(new ChangeMyPasswordCommand(1, "oldPass1!", "newPass2!"));

        // spec REQ-BCP-05: change password does NOT revoke own tokens
        await _refreshRepo.DidNotReceive().RevokeAllActiveForUserAsync(Arg.Any<int>(), Arg.Any<DateTime>(), Arg.Any<CancellationToken>());
    }
}