public void Trade_NoMoney_CannotBuyGoodStock()
{
// Arrange
_trader.Balance = 0;
_mockBroker.GetPrice("AAPL")
.Returns(100);
_mockSignal.Assess()
.Returns(new Assessment {
Recommendation = 1, Symbol = "AAPL"
});
// Act
_trader.Register(_mockSignal);
_trader.Trade();
// Assert
_mockBroker.DidNotReceive().Buy(Arg.Any <string>(), Arg.Any <int>());
_mockPortfolio.DidNotReceive().Add(Arg.Any <string>(), Arg.Any <int>());
}