public async Task AbrirComandaServiceTest()
{
int idComanda = 5;
var repository = new Mock <IComandaRepository>();
repository.Setup(s => s.AbrirComandaAsync())
.Returns(Task.Run(() => idComanda));
var service = new ComandaService(repository.Object);
var result = await service.AbrirComandaAsync();
Assert.Equal(result, idComanda);
}