X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/fee8873d0c5eeec1bd838161357679de1a3fe0cb..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 17706c19b6..2a85e04e87 100644
--- a/sdk/python/tests/test_arv_ws.py
+++ b/sdk/python/tests/test_arv_ws.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-import multiprocessing
+import io
 import os
 import sys
 import tempfile
@@ -8,36 +8,21 @@ 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):
         return arv_ws.main(args)
 
-    def run_ws_process(self, args=[], api_client=None):
-        _, stdout_path = tempfile.mkstemp()
-        _, stderr_path = tempfile.mkstemp()
-        def wrap():
-            def wrapper(*args, **kwargs):
-                sys.stdout = open(stdout_path, 'w')
-                sys.stderr = open(stderr_path, 'w')
-                arv_ws.main(*args, **kwargs)
-            return wrapper
-        p = multiprocessing.Process(target=wrap(), args=(args,))
-        p.start()
-        p.join()
-        out = open(stdout_path, 'r').read()
-        err = open(stderr_path, 'r').read()
-        os.unlink(stdout_path)
-        os.unlink(stderr_path)
-        return p.exitcode, out, err
-
     def test_unsupported_arg(self):
         with self.assertRaises(SystemExit):
             self.run_ws(['-x=unknown'])
 
     def test_version_argument(self):
-        exitcode, out, err = self.run_ws_process(['--version'])
-        self.assertEqual(0, exitcode)
-        self.assertEqual('', out)
-        self.assertNotEqual('', err)
-        self.assertRegexpMatches(err, "[0-9]+\.[0-9]+\.[0-9]+")
+        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]+")