public async Task CatchupSubscription_ReceivesEvents_Success()
{
var streamId = $"TestStream-{Guid.NewGuid():N}";
var credentials = new UserCredentials("admin", "changeit");
var connectionSettings = new ConnectionSettings(credentials, "127.0.0.1", 1113, "myConnection");
var connection = new EventStoreConnection(connectionSettings);
await connection.ConnectAsync().ConfigureAwait(false);
// First write a few events before the subscription
const int initialEventCounter = 3;
for (var i = 0; i < initialEventCounter; ++i)
{
await WriteRandomEventToStream(streamId, connection).ConfigureAwait(false);
}
// Start catchup subscription
var totalEventsHandled = 0;
var subscription = await connection.CreateCatchupSubscription(streamId, 0, async e =>
{
Interlocked.Increment(ref totalEventsHandled);
}).ConfigureAwait(false);
const int afterEventCounter = 4;
for (var i = 0; i < afterEventCounter; ++i)
{
await WriteRandomEventToStream(streamId, connection).ConfigureAwait(false);
}
const int attempts = 10;
for (var i = 0; i < attempts; ++i)
{
if (Thread.VolatileRead(ref totalEventsHandled) == initialEventCounter + afterEventCounter)
{
return;
}
await Task.Delay(500).ConfigureAwait(false);
}
throw new Exception($"Only {Thread.VolatileRead(ref totalEventsHandled)} events handled of expected {initialEventCounter + afterEventCounter}");
}