public void JoeAndJackDaltonGetNotifiedAboutPriceChange()
{
// Arrange
Investor investorJoe = new Investor("Joe Dalton");
Investor investorJack = new Investor("Jack Dalton");
var appleStock = new Stock("Apple", new decimal(100));
appleStock.AddInvestor(investorJoe);
appleStock.AddInvestor(investorJack);
// Act
appleStock.UpdatePrice(new decimal(101));
// Assert
Assert.Equal("Apple stock price just changed to 101", investorJoe.LastStockChangeInfo);
Assert.Equal("Apple stock price just changed to 101", investorJack.LastStockChangeInfo);
}
public void JackDaltonNotInterestedInStocks()
{
// Arrange
Investor investorJoe = new Investor("Joe Dalton");
Investor investorJack = new Investor("Jack Dalton");
var appleStock = new Stock("Apple", new decimal(100));
appleStock.AddInvestor(investorJoe);
appleStock.AddInvestor(investorJack);
// (Jack not interested in)
appleStock.RemoveInvestor(investorJack);
// Act
appleStock.UpdatePrice(new decimal(101));
// Assert
Assert.Equal("Apple stock price just changed to 101", investorJoe.LastStockChangeInfo);
Assert.Equal("Not last stock info", investorJack.LastStockChangeInfo);
}
public void RemoveInvestor(Investor investor) => this.Investors.Remove(investor);
public void AddInvestor(Investor investor) => this.Investors.Add(investor);