public async Task Deve_Cadastrar_Novo_Usuario_E_Retornar_Ok()
{
//arrange
var usuario = ViewModelBuilder.UsuarioCommand();
_mediator.Setup(s => s.Send(It.IsAny <IRequest <CommandResponse> >(), new System.Threading.CancellationToken()))
.ReturnsAsync(CommandResponse.Ok).Verifiable();
//act
var result = await _controller.CriarUsuarioAsync(usuario);
//assert
result.Should().BeAssignableTo <OkResult>();
var vr = result as OkResult;
vr.StatusCode.Should().Be(StatusCodes.Status200OK);
_mediator.Verify();
}