public async Task Should_get_comments_from_grain()
{
var commentsId = DomainId.NewGuid();
var comments = new CommentsResult();
var grain = A.Fake <ICommentsGrain>();
A.CallTo(() => grain.GetCommentsAsync(11))
.Returns(comments);
A.CallTo(() => grainFactory.GetGrain <ICommentsGrain>(commentsId.ToString(), null))
.Returns(grain);
var result = await sut.GetCommentsAsync(commentsId, 11);
Assert.Same(comments, result);
}
public static CommentsResult FromEvents(IEnumerable <Envelope <CommentsEvent> > events, long currentVersion, int lastVersion)
{
var result = new CommentsResult {
Version = currentVersion
};
foreach (var @event in events.Skip(lastVersion < 0 ? 0 : lastVersion + 1))
{
switch (@event.Payload)
{
case CommentDeleted deleted:
{
var id = deleted.CommentId;
if (result.CreatedComments.Any(x => x.Id == id))
{
result.CreatedComments.RemoveAll(x => x.Id == id);
}
else if (result.UpdatedComments.Any(x => x.Id == id))
{
result.UpdatedComments.RemoveAll(x => x.Id == id);
result.DeletedComments.Add(id);
}
else
{
result.DeletedComments.Add(id);
}
break;
}
case CommentCreated created:
{
var comment = new Comment(
created.CommentId,
@event.Headers.Timestamp(),
@event.Payload.Actor,
created.Text,
created.Url);
result.CreatedComments.Add(comment);
break;
}
case CommentUpdated updated:
{
var id = updated.CommentId;
var comment = new Comment(
id,
@event.Headers.Timestamp(),
@event.Payload.Actor,
updated.Text,
null);
if (result.CreatedComments.Any(x => x.Id == id))
{
result.CreatedComments.RemoveAll(x => x.Id == id);
result.CreatedComments.Add(comment);
}
else
{
result.UpdatedComments.Add(comment);
}
break;
}
}
}
return(result);
}
public Task <CommentsResult> GetCommentsAsync(long version = EtagVersion.Any)
{
return(Task.FromResult(CommentsResult.FromEvents(events, Version, (int)version)));
}
