public void AttemptToReadWithZeroSizedBufferFails()
{
var events = new[]
{
Some.Event(),
Some.Event()
};
using (var store = new TempStore())
{
using (var writer = store.Store.BeginWrite())
{
foreach (var(key, payload) in events)
{
writer.Set(key, payload);
}
}
using (var reader = store.Store.BeginRead())
{
var readInto = new byte[0];
Assert.Throws <Exception>(() => reader.TryReadNext(readInto.AsSpan()));
}
}
}
public void WrittenDataCanBeRead()
{
var events = new[]
{
Some.Event(),
Some.Event()
};
using (var store = new TempStore())
{
using (var writer = store.Store.BeginWrite())
{
foreach (var(key, payload) in events)
{
writer.Set(key, payload);
}
}
var count = 0;
using (var reader = store.Store.BeginRead())
{
// We just about guarantee the first read will be too small
var readInto = new byte[1];
ReadResult read;
while (!(read = reader.TryReadNext(readInto.AsSpan())).IsDone)
{
if (read.IsBufferTooSmall(out var required))
{
readInto = new byte[required];
continue;
}
read.GetData(out var key, out var payload);
count += 1;
var(_, foundPayload) = events.Single(evt => key == evt.Item1);
Assert.Equal(payload.Span.ToArray(), foundPayload.ToArray());
}
}
Assert.Equal(events.Length, count);
}
}
