X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/9844eb7f071daea026b617ceb2eac79bb595e9e8..04951581a941697d68cdaf9af6661c3c412f1bce:/sdk/python/tests/test_arv_ws.py

diff --git a/sdk/python/tests/test_arv_ws.py b/sdk/python/tests/test_arv_ws.py
index 5a018273a4..2a85e04e87 100644
--- a/sdk/python/tests/test_arv_ws.py
+++ b/sdk/python/tests/test_arv_ws.py
@@ -1,8 +1,14 @@
 #!/usr/bin/env python
 
+import io
+import os
+import sys
+import tempfile
 import unittest
+
 import arvados.errors as arv_error
 import arvados.commands.ws as arv_ws
+import arvados_testutil as tutil
 
 class ArvWsTestCase(unittest.TestCase):
     def run_ws(self, args):
@@ -11,3 +17,12 @@ class ArvWsTestCase(unittest.TestCase):
     def test_unsupported_arg(self):
         with self.assertRaises(SystemExit):
             self.run_ws(['-x=unknown'])
+
+    def test_version_argument(self):
+        err = io.BytesIO()
+        out = io.BytesIO()
+        with tutil.redirected_streams(stdout=out, stderr=err):
+            with self.assertRaises(SystemExit):
+                self.run_ws(['--version'])
+        self.assertEqual(out.getvalue(), '')
+        self.assertRegexpMatches(err.getvalue(), "[0-9]+\.[0-9]+\.[0-9]+")