add test to ensure -o flag success

1 files changed, 11 insertions, 0 deletions

diff --git a/test/test_csv2rdf.py b/test/test_csv2rdf.py
index c35124ee..d0bba696 100644
--- a/test/test_csv2rdf.py
+++ b/test/test_csv2rdf.py
@@ -1,5 +1,8 @@
 import subprocess
 import unittest
+from os import remove
+from tempfile import mkstemp
+
 
 class CSV2RDFTest(unittest.TestCase):
     def test_csv2rdf_cli(self):
@@ -14,3 +17,11 @@ class CSV2RDFTest(unittest.TestCase):
         self.assertRegex(completed.stderr, r"Took [\d\.]+ seconds.")
         self.assertIn("<http://example.org/instances/0>", completed.stdout)
         self.assertIn("<http://example.org/props/zip>", completed.stdout)
+
+    def test_csv2rdf_cli_fileout(self):
+        _, fname = mkstemp()
+        completed = subprocess.run(["csv2rdf", "-o", fname, "test/csv/realestate.csv"],)
+        self.assertEqual(completed.returncode, 0)
+        with open(fname) as f:
+            self.assertGreater(len(f.readlines()), 0)
+        remove(fname)