From 533442e10e478d524bfbebf9b33f5d5ba00497b3 Mon Sep 17 00:00:00 2001
From: Joseph Weston <joseph.weston08@gmail.com>
Date: Wed, 14 Jun 2017 14:00:42 +0200
Subject: [PATCH] add clarifying comment to test for warnings

---
 kwant/tests/test_builder.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kwant/tests/test_builder.py b/kwant/tests/test_builder.py
index 9bd369d6..9c83ac59 100644
--- a/kwant/tests/test_builder.py
+++ b/kwant/tests/test_builder.py
@@ -715,6 +715,7 @@ def test_fill():
     target = builder.Builder()
     added_sites = target.fill(template_1d, line_200, g(0, 0))
     assert len(added_sites) == 200
+    # raise warning if target already contains all starting sites
     with warns(RuntimeWarning):
         target.fill(template_1d, line_200, g(0, 0))
 
-- 
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