public void OnNext_EnqueuesItems_WhenCalled()
{
var observerToQueue = new ObserverToQueue <string>();
var counter = new ObservableCounter();
counter.Subscribe(observerToQueue);
var task = new Task(() => counter.Count());
Assert.Empty(observerToQueue.Queue);
task.Start();
Thread.Sleep(30);
Assert.NotEmpty(observerToQueue.Queue);
Assert.True(observerToQueue.Queue.Count < 10);
task.Wait();
Assert.Equal(10, observerToQueue.Queue.Count);
Assert.Equal("1,2,3,4,5,6,7,8,9,10".Split(","),
observerToQueue.Queue.ToArray());
}
public void OnNext_LogsItemsToFile_WhenCalled()
{
string tmpFile = Path.GetTempFileName();
int GetFileLineCount(string file)
{
using (var fs = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Write))
using (var reader = new StreamReader(fs))
{
return(reader.ReadToEnd()
.Split(Environment.NewLine)
.Count(l => l.Length > 0));
}
}
var loggers = new ILogger[] { new ListLogger(), new FileLogger(tmpFile), new ConsoleLogger() };
var counter = new ObservableCounter();
foreach (var logger in loggers)
{
counter.Subscribe(logger);
}
var task = new Task(() => counter.Count());
task.Start();
Thread.Sleep(30);
Assert.True(GetFileLineCount(tmpFile) > 0);
Assert.True(GetFileLineCount(tmpFile) < 10);
task.Wait();
Assert.Equal(10, GetFileLineCount(tmpFile));
var lines = File.ReadAllLines(tmpFile);
Assert.Equal("1,2,3,4,5,6,7,8,9,10".Split(","), lines);
File.Delete(tmpFile);
}