public void QuoteShouldNotBeSetIfTheSymbolIsInvalid()
{
IQuoteCache cache = new QuoteCache();
cache.Set("Test", 10, 20);
var quote = cache.Get("Test");
quote.Should().Be(null);
}
public void QuoteShouldNotBeSetIfTheVolumeIsInvalid()
{
IQuoteCache cache = new QuoteCache();
cache.Set("MSF", 10, -20);
var quote = cache.Get("MSF");
quote.Should().Be(null);
}
public void CacheShouldAlwaysStoreLatestValueSetForSymbol()
{
IQuoteCache cache = new QuoteCache();
cache.Set("MSF", 10,20);
cache.Set("MSF", 20,10);
var quote = cache.Get("MSF");
quote.Price.Should().Be(20);
quote.Volume.Should().Be(10);
}
public void SetShouldSEtTheQuoteValueCorrectlyForASymbol()
{
IQuoteCache cache = new QuoteCache();
cache.Set("MSF", 10, 20);
var quote = cache.Get("MSF");
quote.Should().NotBeNull();
quote.Symbol.Should().Be("MSF");
quote.Price.Should().Be(10);
quote.Volume.Should().Be(20);
}
/// <summary>
/// Invoke get and set operations on QuoteCache to run parallelly and test that get always returns the latest value set for the quote.
/// The output is displayed on console as well as in separate files for each thread. Output shows the time when thread ran and quote being set or retrieved
///
/// Validation
/// There are 2 Quote classes, One is Entity and other is Model. The model is using Data Validation attributes for Validations and is more useful for UI.
/// The Entity Quote provides a method on itself that returns true if The Quote is valid and false otherwise.
/// </summary>
/// <param name="args"></param>
private static void Main(string[] args)
{
//There are 2 implementations of Cache, one using simple dictionary and another uisng concurrent dictionary,
//replace QuoteCache by QuoteCacheUsingConcurrentDictionary to run the program using concurrent dictionary implementation
IQuoteCache quoteCache = new QuoteCache();
Parallel.Invoke
(
() =>
{
var quote = quoteCache.Get("MSF");
if (quote != null)
{
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Getting MSF Price " +
quote.Price + " Volume " + quote.Volume;
Console.WriteLine(outputString);
}
},
() =>
{
quoteCache.Set("MSF", 100, 10);
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Setting MSF 100, 10";
Console.WriteLine(outputString);
},
() =>
{
quoteCache.Set("MSFT", 200, 20); //This set operation should not execute
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Setting MSFT 200, 20";
Console.WriteLine(outputString);
},
() =>
{
var quote = quoteCache.Get("MSF");
if (quote != null)
{
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Getting MSF Price " +
quote.Price + " Volume " + quote.Volume;
Console.WriteLine(outputString);
}
},
() =>
{
quoteCache.Set("MSF", 300, 20);
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Setting MSF 300, 20";
Console.WriteLine(outputString);
},
() =>
{
quoteCache.Set("MSF", 400, 20);
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Setting MSF 400, 20";
Console.WriteLine(outputString);
},
() =>
{
var quote = quoteCache.Get("MSF");
if (quote != null)
{
string outputString = "Time of operation " + DateTime.Now.ToString("HH:mm:ss.ffffff") + " Getting MSF Price " +
quote.Price + " Volume " + quote.Volume;
Console.WriteLine(outputString);
}
}
);
Console.Read();
}