public void CaptureService_Can_Write_A_Capture_To_Disk_When_Backed_By_A_FileStream()
{
var statesToWrite = 100;
var simulator = new WeatherSimulator();
var controller = new WeatherStateController(simulator);
var stateResolver = new StateResolver();
stateResolver.Add(controller);
var tmpFile = System.IO.Path.GetTempFileName();
try
{
using (var ms = new FileStream(tmpFile,FileMode.Create))
{
var baseStream = new ConcurrentStream(ms);
var captureService = new CaptureService
{
Stream = baseStream,
StateResolver = stateResolver
};
captureService.Start();
controller.Initialise(captureService.CaptureStream);
simulator.Start();
var count = 0;
var resetEvent = new SlimResetEvent(20);
simulator.NewTemperature += delegate
{
count++;
if (count == statesToWrite)
{
simulator.Stop();
resetEvent.Set();
}
};
resetEvent.Wait();
captureService.Flush();
}
Assert.True(File.Exists(tmpFile));
Assert.True(new FileInfo(tmpFile).Length > 0);
}
finally
{
File.Delete(tmpFile);
}
}
public void Custom_Capture_Formats_Are_Recorded_Correctly()
{
var resetEvent = new SlimResetEvent(20);
var desiredStates = 200;
var generatedStates = 0;
var ms = new MemoryStream();
var stream = new ConcurrentStream(ms);
var weatherSimulator = new WeatherSimulator();
_StateResolver = new StateResolver();
//build the controller that manages weather states
var controller = new WeatherStateController(weatherSimulator);
//watch the simluator for the desired number of states
weatherSimulator.NewTemperature += delegate
{
generatedStates++;
if (generatedStates >= desiredStates)
{
weatherSimulator.Stop();
resetEvent.Set();
}
};
//register it with the capture service
_StateResolver = new StateResolver();
_StateResolver.Add(controller);
//create the capture stream, will create an entry in the SAT for the WeatherStateController
var captureStream = new CaptureStream(stream, FileAccess.Write, _StateResolver);
//pass the controller the stream so that it can be written to
controller.Initialise(captureStream);
//start the simulator, the controller will watch for changes internally
weatherSimulator.Start();
//wait until the event is raised [desiredStates] number of times
resetEvent.Wait();
Assert.Equal(generatedStates, captureStream.Count);
//rewind the stream and open it for reading, verify the values match
stream.Position = 0;
captureStream = new CaptureStream(stream, FileAccess.Read, _StateResolver);
for (int i = 0; i < captureStream.Count; i++)
{
var state = captureStream.Read();
Assert.Equal(weatherSimulator.History[i], (state as WeatherCaptureState).Temperature);
}
}