public async Task WritingNotifiesCallbackWhenHostHasCrashed()
{
var hostCrashed = new AutoResetEvent(false);
var exception = new TaskCompletionSource <Exception>();
var disposed = false;
var p = RunTestProcess("NotifiesCallbackWhenHostCrashes " + _pipeName);
Thread.Sleep(1000);
var task = Task.Run(() =>
{
using (_pipeName.BeginWritingMessages("name", e => exception.SetResult(e), Observable.Create <IBinaryMessage>(obs =>
{
obs.OnNext(IntMessage.Compose(42));
hostCrashed.WaitOne();
obs.OnNext(IntMessage.Compose(43));
return(Disposable.Create(() => disposed = true));
}))){}
});
Thread.Sleep(1000); //Give writing thread time to connect, if we kill the host too early, Connect() will block
Assert.IsFalse(exception.Task.IsCompleted);
p.Kill();
p.WaitForExit();
hostCrashed.Set();
await task;
Assert.IsNotNull(await exception.Task);
Assert.IsTrue(disposed);
}
public async Task CanReadAMessage()
{
using (var inbox = StreamWithMessages(IntMessage.Compose(42)))
{
Assert.AreEqual(42, await inbox.ReadMessages("name").SelectSome(IntMessage.TryParse).FirstAsync());
}
}
public async Task WritingNotifiesCallbackWhenHostHasClosed()
{
var wroteMessage = new TaskCompletionSource <Unit>();
var hostClosed = new AutoResetEvent(false);
var exception = new TaskCompletionSource <Exception>();
var disposed = false;
var hostTask = Pipe.Host(_pipeName);
var task = Task.Run(() =>
{
using (_pipeName.BeginWritingMessages("name", e => exception.SetResult(e), Observable.Create <IBinaryMessage>(obs =>
{
obs.OnNext(IntMessage.Compose(42));
wroteMessage.SetResult(Unit.Default);
hostClosed.WaitOne();
obs.OnNext(IntMessage.Compose(43));
return(Disposable.Create(() => disposed = true));
}))){}
});
var host = await hostTask;
await wroteMessage.Task;
using (var reader = new BinaryReader(host))
{
var msg = IntMessage.TryParse(BinaryMessage.ReadFrom(reader));
Assert.AreEqual(42, msg.Value);
}
Assert.IsFalse(exception.Task.IsCompleted);
host.Close();
hostClosed.Set();
await task;
Assert.IsNotNull(await exception.Task);
Assert.IsTrue(disposed);
}
IObservable <IBinaryMessage> OneMessageThenError(int i, Exception error, Action dispose)
{
return(Observable.Create <IBinaryMessage>(obs =>
{
obs.OnNext(IntMessage.Compose(i));
obs.OnError(error);
return dispose;
}));
}
public async Task NotifiesOnWriteError()
{
var stream = new CantDoAnythingStream();
var source = new TaskCompletionSource <Unit>();
using (stream.BeginWritingMessages("name",
e =>
{
source.SetResult(Unit.Default);
},
Observable.Return(IntMessage.Compose(42))))
{
await source.Task;
}
}
public async Task CanWriteAMessage()
{
using (var stream = new MemoryStream())
{
Exception exception = null;
var message = IntMessage.Compose(42);
var notifyingStream = new NotifyingStream(stream, (int)LengthOf(message));
using (notifyingStream.BeginWritingMessages("name", e => exception = e, Observable.Return(message)))
{
await notifyingStream.Task;
var msg = IntMessage.TryParse(MessageFromStream(stream));
Assert.AreEqual(42, msg.Value);
Assert.IsNull(exception);
}
}
}
public async Task CompletesAtClosedPipe()
{
WriteMessagesToCurrentPipe(IntMessage.Compose(42));
int result = -1;
var completed = new TaskCompletionSource <Exception>();
using (_pipeName.ReadMessages("name").RefCount().SelectSome(IntMessage.TryParse)
.Subscribe(
i => result = i,
e => completed.SetResult(e),
() => completed.SetResult(null)))
{
var exception = await completed.Task;
Assert.AreEqual(42, result);
Assert.IsNull(exception);
}
}
public async Task CompletesAtEndOfStream()
{
using (var inbox = StreamWithMessages(IntMessage.Compose(42)))
{
int result = -1;
var completed = new TaskCompletionSource <Exception>();
using (inbox.ReadMessages("name").SelectSome(IntMessage.TryParse)
.Subscribe(
i => result = i,
e => completed.SetResult(e),
() => completed.SetResult(null)))
{
var exception = await completed.Task;
Assert.AreEqual(42, result);
Assert.IsNull(exception);
}
}
}
public async Task ErrorsAtOtherExceptions()
{
using (var messages = StreamWithMessages(IntMessage.Compose(42)))
using (var closingStream = new ReadThenThrowStream(messages, new Exception("Alderaan destroyed")))
{
int result = -1;
var completed = new TaskCompletionSource <Exception>();
using (closingStream.ReadMessages("name").SelectSome(IntMessage.TryParse)
.Subscribe(
i => result = i,
e => completed.SetResult(e),
() => completed.SetResult(null)))
{
var exception = await completed.Task;
Assert.AreEqual(42, result);
Assert.AreEqual("Alderaan destroyed", exception.Message);
}
}
}
public async Task CompletesAtClosedConnection()
{
using (var messages = StreamWithMessages(IntMessage.Compose(42)))
using (var closingStream = new ReadThenThrowStream(messages, new IOException("", _forciblyClosedConnection)))
{
int result = -1;
var completed = new TaskCompletionSource <Exception>();
using (closingStream.ReadMessages("name").SelectSome(IntMessage.TryParse)
.Subscribe(
i => result = i,
e => completed.SetResult(e),
() => completed.SetResult(null)))
{
var exception = await completed.Task;
Assert.AreEqual(42, result);
Assert.IsNull(exception);
}
}
}
//Characterization test, not sure if this is the desired behaviour
public async Task CompletesWhenClientCrashes()
{
var messageToSend = GetMessageAsBase64ForUseInTestProcess(IntMessage.Compose(42)); //Paste this in the testprocess if the format changes
var result = new TaskCompletionSource <int>();
var completed = new TaskCompletionSource <Exception>();
var p = RunTestProcess("CompletesWhenClientCrashes " + _pipeName);
using (_pipeName.ReadMessages("name").RefCount().SelectSome(IntMessage.TryParse)
.Subscribe(
i => result.SetResult(i),
e => completed.SetResult(e),
() => completed.SetResult(null)))
{
await result.Task;
p.Kill();
p.WaitForExit();
Console.WriteLine();
var exception = await completed.Task;
Assert.IsNull(exception);
}
}
public async Task CanReadAMessage()
{
WriteMessagesToCurrentPipe(IntMessage.Compose(42));
Assert.AreEqual(42, await _pipeName.ReadMessages("name").RefCount().SelectSome(IntMessage.TryParse).FirstAsync());
}
[Ignore("This is currently not the case, maybe it should be?")] //Just wrote this as an experiment, and left it in in case we want it later
public async Task ReaderCompletesWhenWriterCompletes()
{
Exception writeError = null;
Exception readError = null;
var result = -1;
var completed = new TaskCompletionSource <Unit>();
using (_pipeName.BeginWritingMessages("name", e => { writeError = e; }, Observable.Return(IntMessage.Compose(42))))
{
using (_pipeName.ReadMessages("name").RefCount().SelectSome(IntMessage.TryParse)
.Subscribe(
i => result = i,
e => readError = e,
() => completed.SetResult(Unit.Default)))
{
await completed.Task;
Assert.AreEqual(42, result);
Assert.IsNull(writeError);
Assert.IsNull(readError);
}
}
}
public async Task CanCommunicate()
{
Exception error = null;
using (_pipeName.BeginWritingMessages("name", e => { error = e; }, Observable.Return(IntMessage.Compose(42))))
{
var msg = await _pipeName.ReadMessages("name").RefCount().SelectSome(IntMessage.TryParse).FirstAsync();
Assert.AreEqual(42, msg);
Assert.IsNull(error);
}
}
