X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/991d037e7b4741450dff745d22b0758170fe4ed9..43a9015c4e82f3da58f7824694ac2ef1d80fca6c:/sdk/python/tests/test_stream.py

diff --git a/sdk/python/tests/test_stream.py b/sdk/python/tests/test_stream.py
index 37cdbf2f24..dc84a037f8 100644
--- a/sdk/python/tests/test_stream.py
+++ b/sdk/python/tests/test_stream.py
@@ -1,4 +1,6 @@
-#!/usr/bin/env python
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
 
 from __future__ import absolute_import
 from builtins import object
@@ -72,13 +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())