public async Task Should_Not_Cache_Exceptions()
{
Assert.AreEqual(0, StockQuoteHandler.Called);
var getQuote = new GetStockQuote("EX");
try
{
await _mediator.SendAsync(getQuote.Cached());
Assert.Fail("Expected exception");
}
catch (Exception ex)
{
Assert.AreEqual("Stock Exchange is down", ex.Message);
}
try
{
await _mediator.SendAsync(getQuote.Cached());
Assert.Fail("Expected exception");
}
catch (Exception ex)
{
Assert.AreEqual("Stock Exchange is down", ex.Message);
}
Assert.AreEqual(2, StockQuoteHandler.Called);
}
public async Task Should_Make_Initial_Request()
{
Assert.AreEqual(0, StockQuoteHandler.Called);
var getQuote = new GetStockQuote("AAPL");
var quote = await _mediator.SendAsync(getQuote.Cached());
Assert.AreEqual(1, StockQuoteHandler.Called);
}
public async Task Should_Cache_Initial_Response()
{
Assert.AreEqual(0, StockQuoteHandler.Called);
var getQuote = new GetStockQuote("AAPL");
var quote1 = await _mediator.SendAsync(getQuote.Cached());
var quote2 = await _mediator.SendAsync(getQuote.Cached());
Assert.AreEqual(1, StockQuoteHandler.Called);
Assert.AreEqual(quote1.Value, quote2.Value);
}
public async Task Should_Refresh_Response_If_Old()
{
Assert.AreEqual(0, StockQuoteHandler.Called);
var getQuote = new GetStockQuote("AAPL");
await _mediator.SendAsync(getQuote.Cached());
await Task.Delay(TimeSpan.FromSeconds(.2));
await _mediator.SendAsync(getQuote.Cached(TimeSpan.FromSeconds(.1)));
Assert.AreEqual(2, StockQuoteHandler.Called);
}
public async Task Should_Invalidate_Cache()
{
Assert.AreEqual(0, StockQuoteHandler.Called);
var getQuote = new GetStockQuote("AAPL");
var quote1 = await _mediator.SendAsync(getQuote.Cached());
var quote2 = await _mediator.SendAsync(getQuote.Cached());
var quote3 = await _mediator.SendAsync(getQuote.InvalidateCache());
var quote4 = await _mediator.SendAsync(getQuote.Cached());
Assert.AreEqual(2, StockQuoteHandler.Called);
Assert.AreEqual(quote1.Value, quote2.Value);
Assert.AreEqual(quote1.Value, quote3.Value);
Assert.AreEqual(quote1.Value, quote3.Value);
}
public bool Equals(GetStockQuote other)
{
return(Symbol == other.Symbol);
}