public void TryGetValue_should_return_true_for_added_keys()
{
var keys = Enumerable.Range(0, 100 * 000).Select(_ => Guid.NewGuid()).ToArray();
foreach (var key in keys)
{
dic.Add(key, key.ToString());
dic.TryGetValue(key, out _).Should().BeTrue();
}
foreach (var key in keys)
{
dic.TryGetValue(key, out _).Should().BeTrue();
}
}
private void LaunchReader(TimeSpan time, CancellationToken cancellationToken)
{
var watch = Stopwatch.StartNew();
var lastRead = watch.ElapsedTicks;
var readerTask = Task.Run(() =>
{
var random = new Random(Guid.NewGuid().GetHashCode());
try
{
while (watch.Elapsed < time && !cancellationToken.IsCancellationRequested)
{
var index = random.Next(keys.Length);
var found = dic.TryGetValue(keys[index], out var value);
if (!found && index < keys.Length / 2)
{
throw new Exception("Failed to find a key which never gets removed!");
}
if (found && value != keys[index].ToString())
{
throw new Exception("TryGetValue() returned some garbage as value!");
}
Interlocked.Exchange(ref lastRead, watch.ElapsedTicks);
}
}
catch (Exception error)
{
Console.Out.WriteLine(error);
throw new Exception("Error in reader!", error);
}
});
var checkerTask = Task.Run(() =>
{
while (watch.Elapsed < time && !cancellationToken.IsCancellationRequested)
{
Thread.Sleep(50);
var diff = new TimeSpan(watch.ElapsedTicks - Interlocked.Read(ref lastRead));
if (diff.TotalSeconds >= 0.5)
{
throw new Exception("A reader hangs!");
}
}
});
tasks.Add(readerTask);
tasks.Add(checkerTask);
}