public async Task return_events_in_correct_order_compared_to_written()
{
var events = await _fixture.Client.ReadAllForwardsAsync(Position.Start, _fixture.Events.Length * 2, false)
.ToArrayAsync();
Assert.True(EventDataComparer.Equal(_fixture.Events, events.AsResolvedTestEvents().ToArray()));
}
public async Task return_events_in_reversed_order_compared_to_written()
{
var events = await _fixture.Client.ReadAllBackwardsAsync(Position.End, _fixture.Events.Length, false)
.ToArrayAsync();
Assert.True(EventDataComparer.Equal(
_fixture.Events.Reverse().ToArray(),
events.AsResolvedTestEvents().ToArray()));
}
public async Task returns_all_events_including_tombstone()
{
var events = await _fixture.Client.ReadAllForwardsAsync(Position.Start, _fixture.Events.Length * 2, false)
.ToArrayAsync();
var tombstone = events.Last();
Assert.Equal(Stream, tombstone.Event.EventStreamId);
Assert.Equal(SystemEventTypes.StreamDeleted, tombstone.Event.EventType);
Assert.True(EventDataComparer.Equal(_fixture.Events, events.AsResolvedTestEvents().ToArray()));
}
public async Task reads_all_existing_events_and_keep_listening_to_new_ones()
{
var appeared = new TaskCompletionSource <bool>();
var dropped = new TaskCompletionSource <(SubscriptionDroppedReason, Exception)>();
var appearedEvents = new List <EventRecord>();
var beforeEvents = _fixture.CreateTestEvents(10).ToArray();
var afterEvents = _fixture.CreateTestEvents(10).ToArray();
foreach (var @event in beforeEvents)
{
await _fixture.Client.AppendToStreamAsync($"stream-{@event.EventId:n}", AnyStreamRevision.NoStream,
new[] { @event });
}
using var subscription = _fixture.Client.SubscribeToAll(EventAppeared, false, SubscriptionDropped);
foreach (var @event in afterEvents)
{
await _fixture.Client.AppendToStreamAsync($"stream-{@event.EventId:n}", AnyStreamRevision.NoStream,
new[] { @event });
}
await appeared.Task.WithTimeout();
Assert.True(EventDataComparer.Equal(beforeEvents.Concat(afterEvents).ToArray(), appearedEvents.ToArray()));
Assert.False(dropped.Task.IsCompleted);
subscription.Dispose();
var(reason, ex) = await dropped.Task.WithTimeout();
Assert.Equal(SubscriptionDroppedReason.Disposed, reason);
Assert.Null(ex);
Task EventAppeared(StreamSubscription s, ResolvedEvent e, CancellationToken ct)
{
if (!SystemStreams.IsSystemStream(e.OriginalStreamId))
{
appearedEvents.Add(e.Event);
if (appearedEvents.Count >= beforeEvents.Length + afterEvents.Length)
{
appeared.TrySetResult(true);
}
}
return(Task.CompletedTask);
}
void SubscriptionDropped(StreamSubscription s, SubscriptionDroppedReason reason, Exception ex) =>
dropped.SetResult((reason, ex));
}
public async Task be_able_to_read_from_arbitrary_position()
{
var stream = _fixture.GetStreamName();
var events = _fixture.CreateTestEvents(10).ToArray();
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.NoStream, events);
var actual = await _fixture.Client.ReadStreamForwardsAsync(stream, new StreamRevision(3), 2)
.Select(x => x.Event)
.ToArrayAsync();
Assert.True(EventDataComparer.Equal(events.Skip(3).Take(2).ToArray(), actual));
}
public async Task returns_events_in_order()
{
var stream = _fixture.GetStreamName();
var expected = _fixture.CreateTestEvents(10).ToArray();
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.NoStream, expected);
var actual = await _fixture.Client
.ReadStreamForwardsAsync(stream, StreamRevision.Start, expected.Length, false)
.Select(x => x.Event).ToArrayAsync();
Assert.True(EventDataComparer.Equal(expected, actual));
}
public async Task be_able_to_read_first_event()
{
var stream = _fixture.GetStreamName();
var testEvents = _fixture.CreateTestEvents(10).ToArray();
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.NoStream, testEvents);
var events = await _fixture.Client.ReadStreamForwardsAsync(stream, StreamRevision.Start, 1)
.Select(x => x.Event)
.ToArrayAsync();
Assert.Single(events);
Assert.True(EventDataComparer.Equal(testEvents[0], events[0]));
}
public async Task be_able_to_read_single_event_from_arbitrary_position()
{
var stream = _fixture.GetStreamName();
var events = _fixture.CreateTestEvents(10).ToArray();
var expected = events[7];
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.NoStream, events);
var actual = await _fixture.Client.ReadStreamForwardsAsync(stream, new StreamRevision(7), 1, false)
.Select(x => x.Event)
.SingleAsync();
Assert.True(EventDataComparer.Equal(expected, actual));
}
public async Task read_stream_backwards_respects_max_count()
{
var stream = _fixture.GetStreamName();
await _fixture.Client.SetStreamMetadataAsync(stream, AnyStreamRevision.NoStream, new StreamMetadata(3));
var expected = _fixture.CreateTestEvents(5).ToArray();
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.NoStream, expected);
var actual = await _fixture.Client.ReadStreamBackwardsAsync(stream, StreamRevision.End, 100)
.Select(x => x.Event)
.ToArrayAsync();
Assert.Equal(3, actual.Length);
Assert.True(EventDataComparer.Equal(expected.Skip(2).Reverse().ToArray(), actual));
}
public async Task reads_all_existing_events_and_keep_listening_to_new_ones()
{
var stream = _fixture.GetStreamName();
var appeared = new TaskCompletionSource <bool>();
var dropped = new TaskCompletionSource <(SubscriptionDroppedReason, Exception)>();
var appearedEvents = new List <EventRecord>();
var beforeEvents = _fixture.CreateTestEvents(10).ToArray();
var afterEvents = _fixture.CreateTestEvents(10).ToArray();
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.Any, beforeEvents);
using var subscription =
_fixture.Client.SubscribeToStream(stream, EventAppeared, false, SubscriptionDropped);
var writeResult = await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.Any, afterEvents);
await appeared.Task.WithTimeout(TimeSpan.FromMinutes(10));
Assert.True(EventDataComparer.Equal(beforeEvents.Concat(afterEvents).ToArray(), appearedEvents.ToArray()));
Assert.False(dropped.Task.IsCompleted);
subscription.Dispose();
var(reason, ex) = await dropped.Task.WithTimeout();
Assert.Equal(SubscriptionDroppedReason.Disposed, reason);
Assert.Null(ex);
Task EventAppeared(StreamSubscription s, ResolvedEvent e, CancellationToken ct)
{
appearedEvents.Add(e.Event);
if (appearedEvents.Count >= beforeEvents.Length + afterEvents.Length)
{
appeared.TrySetResult(true);
}
return(Task.CompletedTask);
}
void SubscriptionDropped(StreamSubscription s, SubscriptionDroppedReason reason, Exception ex)
{
dropped.SetResult((reason, ex));
}
}
public async Task returns_all_events_including_tombstone()
{
var events = await _fixture.Client.ReadAllForwardsAsync(Position.Start, _fixture.Events.Length * 2, false)
.ToArrayAsync();
var tombstone = events.Last();
Assert.Equal(SystemStreams.MetastreamOf(Stream), tombstone.Event.EventStreamId);
Assert.Equal(SystemEventTypes.StreamMetadata, tombstone.Event.EventType);
var metadata = JsonSerializer.Deserialize <StreamMetadata>(tombstone.Event.Data, new JsonSerializerOptions {
Converters = { StreamMetadataJsonConverter.Instance }
});
Assert.True(metadata.TruncateBefore.HasValue);
Assert.Equal(StreamRevision.End, metadata.TruncateBefore.Value);
Assert.True(EventDataComparer.Equal(_fixture.Events, events.AsResolvedTestEvents().ToArray()));
}
public async Task after_setting_more_strict_max_count_read_stream_forward_reads_less_events()
{
var stream = _fixture.GetStreamName();
await _fixture.Client.SetStreamMetadataAsync(stream, AnyStreamRevision.NoStream, new StreamMetadata(3));
var expected = _fixture.CreateTestEvents(5).ToArray();
await _fixture.Client.AppendToStreamAsync(stream, AnyStreamRevision.NoStream, expected);
await _fixture.Client.SetStreamMetadataAsync(stream, StreamRevision.Start, new StreamMetadata(2));
var actual = await _fixture.Client.ReadStreamForwardsAsync(stream, StreamRevision.Start, 100)
.Select(x => x.Event)
.ToArrayAsync();
Assert.Equal(2, actual.Length);
Assert.True(EventDataComparer.Equal(expected.Skip(3).ToArray(), actual));
}