From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Fri, 9 Oct 2020 01:12:26 +0000 (-0700)
Subject: add a test case for sequential PS graphs
X-Git-Tag: 2.46.0~20^2^2~39^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=21205cb49bf670688665447f8bb2ab4fe2051971;p=graphviz

add a test case for sequential PS graphs

Related to #1845.
---

diff --git a/rtest/1845.dot b/rtest/1845.dot
new file mode 100644
index 000000000..2f09852ac
--- /dev/null
+++ b/rtest/1845.dot
@@ -0,0 +1,7 @@
+digraph {
+    fear -> anger;
+}
+
+digraph {
+    anger -> hate;
+}
diff --git a/rtest/test_regression.py b/rtest/test_regression.py
index 9a186ae4b..cc19419e0 100644
--- a/rtest/test_regression.py
+++ b/rtest/test_regression.py
@@ -369,3 +369,16 @@ def test_1818():
       universal_newlines=True)
 
     assert 'Usage' in output, 'lefty -? did not show usage'
+
+def test_1845():
+    '''
+    rendering sequential graphs to PS should not segfault
+    https://gitlab.com/graphviz/graphviz/-/issues/1845
+    '''
+
+    # locate our associated test case in this directory
+    input = os.path.join(os.path.dirname(__file__), '1845.dot')
+    assert os.path.exists(input), 'unexpectedly missing test case'
+
+    # generate a multipage PS file from this input
+    subprocess.check_call(['dot', '-Tps', '-o', os.devnull, input])