public void Conta_Controller_Put_Sacar_Sucesso()
{
double valorSaque = 10;
var conta = ObjectMother.ObterContaValida();
_contaServicoMock.Setup(c => c.Sacar(conta.Id, valorSaque)).Returns(conta);
IHttpActionResult callback = _contasController.Sacar(conta.Id, valorSaque);
var httpResponse = callback.Should().BeOfType <OkNegotiatedContentResult <Conta> >().Subject;
httpResponse.Content.Should().NotBeNull();
_contaServicoMock.Verify(s => s.Sacar(conta.Id, valorSaque), Times.Once);
}