From a9f226b83b2ab67f2cc4777180d32e3a10ba9520 Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Tue, 8 Sep 2020 23:44:36 +0200
Subject: [PATCH] Add test of lefty usage

---
 rtest/test_regression.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/rtest/test_regression.py b/rtest/test_regression.py
index 2fbc48b2e..61568b349 100644
--- a/rtest/test_regression.py
+++ b/rtest/test_regression.py
@@ -330,3 +330,15 @@ def test_1813():
       universal_newlines=True)
 
     assert 'Usage' in output, 'gvedit -? did not show usage'
+
+def test_1818():
+    '''
+    lefty -? should show usage
+    https://gitlab.com/graphviz/graphviz/-/issues/1813
+    '''
+
+    output = subprocess.check_output(['lefty', '-?'],
+      stderr=subprocess.STDOUT,
+      universal_newlines=True)
+
+    assert 'Usage' in output, 'lefty -? did not show usage'
-- 
2.40.0