public void CanReadFromCheckpoint(long checkpoint, int expectedCount, int firstRead)
{
_changeStream.Append(Enumerable.Range(0, 10).Select(BitConverter.GetBytes).ToArray());
var read = _changeStream.ReadAfter(checkpoint, 2).ToArray();
read.Length.ShouldBe(expectedCount);
for (int i = 0; i < expectedCount; i++, firstRead++)
{
read[i].Key.ShouldBe(firstRead);
BitConverter.ToInt32(read[i].Value, 0).ShouldBe(firstRead);
}
}
public Task <ReadAllPage> ReadForward(
AllStreamPosition from = default(AllStreamPosition),
int batchSize = 10,
CancellationToken cancellationToken = default(CancellationToken))
{
var pairs = _allStream.ReadAfter(from.ToInt64() - 1, batchSize);
var messages = pairs.Select(p => new Envelope(
TranslateKey(p.Key),
Serializer.DeserializeJson <DocumentSaved>(p.Value)))
.ToArray();
if (messages.Length == 0)
{
return(Task.FromResult(new ReadAllPage(from, from, true, new Envelope[0])));
}
var next = messages.Last().Checkpoint.Shift();
var isEnd = _allStream.GetLastCheckpoint().Key < next;
return(Task.FromResult(new ReadAllPage(from, next, isEnd, messages)));
}