X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/3993ba462c113090bc2db79db30838c017a5aa3b..e158f485053be1e840073b321033d60d686a55a8:/sdk/python/tests/arvados_testutil.py

diff --git a/sdk/python/tests/arvados_testutil.py b/sdk/python/tests/arvados_testutil.py
index d7d20e8891..04ca6b5e10 100644
--- a/sdk/python/tests/arvados_testutil.py
+++ b/sdk/python/tests/arvados_testutil.py
@@ -1,15 +1,16 @@
 #!/usr/bin/env python
 
 import errno
+import hashlib
 import httplib
 import httplib2
 import io
 import mock
 import os
+import requests
 import shutil
 import tempfile
 import unittest
-import requests
 
 # Use this hostname when you want to make sure the traffic will be
 # instantly refused.  100::/64 is a dedicated black hole.
@@ -50,6 +51,21 @@ def mock_requestslib_responses(method, body, *codes, **headers):
     return mock.patch(method, side_effect=(
         fake_requests_response(code, body, **headers) for code in codes))
 
+class MockStreamReader(object):
+    def __init__(self, name='.', *data):
+        self._name = name
+        self._data = ''.join(data)
+        self._data_locators = ['{}+{}'.format(hashlib.md5(d).hexdigest(),
+                                              len(d)) for d in data]
+        self.num_retries = 0
+
+    def name(self):
+        return self._name
+
+    def readfrom(self, start, size, num_retries=None):
+        return self._data[start:start + size]
+
+
 class ArvadosBaseTestCase(unittest.TestCase):
     # This class provides common utility functions for our tests.