/// <summary>
/// Returns a ValueTask + uses a cache
/// </summary>
/// <param name="StartDate"></param>
/// <returns></returns>
public static ValueTask <IEnumerable <HistoricalQuote> > GetHistoricalData(DateTime StartDate)
{
if (HistoricalDataCache?.Last().Date < StartDate)
{
return(new ValueTask <IEnumerable <HistoricalQuote> >(HistoricalDataCache.Where(n => n.Date >= StartDate)));
}
else
{
var task = HistoricalPriceReader.GetNewerThan(StartDate);
task.ContinueWith((n) => HistoricalDataCache = n.Result);
return(new ValueTask <IEnumerable <HistoricalQuote> >(task));
}
}
public async Task ShouldCache()
{
var sgx = new Mock <ISgxClient>(MockBehavior.Strict);
sgx.SetupSequence(c => c.GetDay(It.IsAny <Day>())).ReturnsAsync("Hello!");
using (var directory = Temporary.GetEmptyDirectory())
{
var cache = new HistoricalDataCache(sgx.Object, directory);
Day day = 1;
var data = await cache.GetDay(day);
File.ReadAllText(cache.GetCacheFile(day).Absolute).Should().Be(data);
}
}