X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/4a8883858028d4068b52710acd9c349108b6fc7c..e67d0f5d43c56f78694ea4a5f93acec5c93cd0fb:/sdk/python/tests/test_stream.py

diff --git a/sdk/python/tests/test_stream.py b/sdk/python/tests/test_stream.py
index 664deb5123..dc84a037f8 100644
--- a/sdk/python/tests/test_stream.py
+++ b/sdk/python/tests/test_stream.py
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 from __future__ import absolute_import
 from builtins import object
 import bz2
@@ -70,13 +74,16 @@ class StreamFileReaderTestCase(unittest.TestCase):
 
     def test_seek_min_zero(self):
         sfile = self.make_count_reader()
-        sfile.seek(-2, os.SEEK_SET)
+        self.assertEqual(0, sfile.tell())
+        with self.assertRaises(IOError):
+            sfile.seek(-2, os.SEEK_SET)
         self.assertEqual(0, sfile.tell())
 
     def test_seek_max_size(self):
         sfile = self.make_count_reader()
         sfile.seek(2, os.SEEK_END)
-        self.assertEqual(9, sfile.tell())
+        # POSIX permits seeking past end of file.
+        self.assertEqual(11, sfile.tell())
 
     def test_size(self):
         self.assertEqual(9, self.make_count_reader().size())