From 6b13729eba2b074a3c42f78505014de68d980133 Mon Sep 17 00:00:00 2001
From: Eric Coissac <eric.coissac@metabarcoding.org>
Date: Tue, 14 Jun 2022 09:53:35 +0200
Subject: [PATCH] Adds a test for not pushing empty batch on the output

---
 pkg/obiiter/batchiterator.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkg/obiiter/batchiterator.go b/pkg/obiiter/batchiterator.go
index 910aa36..ed7eff1 100644
--- a/pkg/obiiter/batchiterator.go
+++ b/pkg/obiiter/batchiterator.go
@@ -598,7 +598,9 @@ func (iterator IBioSequenceBatch) FilterOn(predicate obiseq.SequencePredicate,
 			}
 
 			seqs.slice = slice[:j]
-			trueIter.Push(seqs)
+			if seqs.Length() > 0 {
+				trueIter.Push(seqs)
+			}
 		}
 
 		trueIter.Done()