public void AddingMultipleSymbols_ShouldBeSuccessful(string symbols)
{
// arrange
var symbolList = symbols.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries);
var marketDataStream = new Subject <MarketData>();
symbolList.ForEach(symbol => _marketDataService
.Setup(x => x.StartSubscriptionAsync(symbol))
.Returns(Task.FromResult <IObservable <MarketData> >(marketDataStream)));
var vm = new StockPricesViewModel(_marketDataService.Object, Scheduler.Immediate);
// act
symbolList.ForEach(async symbol => await vm.AddSymbolAsync(symbol));
// assert -- collection should contain the empty market data
vm.MarketDataCollection.ShouldNotBeEmpty();
vm.MarketDataCollection.Count.ShouldBe(symbolList.Count());
vm.MarketDataCollection.ShouldContain(x => symbolList.Contains(x.Symbol));
// act
var marketData = symbolList.Select(GenerateMarketData).ToList();
marketData.ForEach(m => marketDataStream.OnNext(m));
// assert -- collection should contain updated values
var expectedUpdatedMarketData = marketData.Select(m => new MarketDataViewModel(m));
vm.MarketDataCollection.ShouldBe(expectedUpdatedMarketData);
}
public async Task AddingSymbol_ShouldBeSuccessful(string symbol)
{
// arrange
var marketDataStream = new Subject <MarketData>();
_marketDataService
.Setup(x => x.StartSubscriptionAsync(symbol))
.Returns(Task.FromResult <IObservable <MarketData> >(marketDataStream));
var vm = new StockPricesViewModel(_marketDataService.Object, Scheduler.Immediate);
// act
await vm.AddSymbolAsync(symbol);
// assert
vm.MarketDataCollection.ShouldNotBeEmpty();
vm.MarketDataCollection.ShouldContain(x => x.Symbol == symbol && x.LastPrice == 0 && x.ClosingPrice == 0);
// act
var marketData = GenerateMarketData(symbol);
marketDataStream.OnNext(marketData);
// assert
vm.MarketDataCollection.ShouldContain(x =>
x.Symbol == symbol &&
x.LastPrice == marketData.LastPrice &&
x.ClosingPrice == marketData.ClosingPrice);
}
public ShellViewModel(
StockPricesViewModel stockPricesViewModel,
AddSymbolViewModel addSymbolViewModel)
{
StockPricesViewModel = stockPricesViewModel;
AddSymbolViewModel = addSymbolViewModel;
AddSymbolViewModel.StockSymbolService = StockPricesViewModel;
}
public void Disposing_ShouldBeSuccessful()
{
// arrange
// act
var vm = new StockPricesViewModel(_marketDataService.Object, Scheduler.Immediate);
vm.Dispose();
// assert
vm.MarketDataCollection.ShouldBeEmpty();
}
