func checkEnumerate(idx *index.Index, want []blob.SizedRef, args *enumArgs) error {
if args == nil {
args = &enumArgs{}
}
if args.ctx == nil {
args.ctx = context.TODO()
}
if args.dest == nil {
args.dest = make(chan blob.SizedRef)
}
if args.limit == 0 {
args.limit = 5000
}
errCh := make(chan error)
go func() {
errCh <- idx.EnumerateBlobs(args.ctx, args.dest, args.after, args.limit)
}()
for k, sbr := range want {
got, ok := <-args.dest
if !ok {
return fmt.Errorf("could not enumerate blob %d", k)
}
if got != sbr {
return fmt.Errorf("enumeration %d: got %v, wanted %v", k, got, sbr)
}
}
_, ok := <-args.dest
if ok {
return errors.New("chan was not closed after enumeration")
}
return <-errCh
}
