Added test to verify pq.error_message() is sane on null args

diff --git a/tests/pq/test_misc.py b/tests/pq/test_misc.py
index 86c936061b965dd7935e0eb40abeca9aae7e0982..d61457d3f037dec113ab364a72760c72692d86ba 100644 (file)
--- a/tests/pq/test_misc.py
+++ b/tests/pq/test_misc.py
@@ -13,3 +13,8 @@ def test_error_message(pq, pgconn):
 
     with pytest.raises(TypeError):
         pq.error_message(None)
+
+    res.clear()
+    assert pq.error_message(res) == "no details available"
+    pgconn.finish()
+    assert "NULL" in pq.error_message(pgconn)