Update use of open() in object API

* Switch to use io.open() for py3 compatibility and simpler testing.
* Open files in 'rb' mode to avoid translation on Windows

Previously tests simply relied on files that were present in the
repository to run tests using open().  Change the filenames to ensure
that no longer happens.

requests_mock doesn't have a way to match against the request body for
PUT/POST; an attempt to add a new Matcher to do that worked but it
needs to subclass the currently private adapter._Matcher class or
duplicate most of its functionality.

Change-Id: I8c30b41db20af8ecafe67e760e872fc08adec905

openstackclient/api/object_store_v1.py

@@ -13,6 +13,7 @@
 
 """Object Store v1 API Library"""
 
+import io
 import os
 import six
 
@@ -187,7 +188,12 @@ class APIv1(api.BaseAPI):
             return {}
 
         full_url = "%s/%s" % (container, object)
-        response = self.create(full_url, method='PUT', data=open(object))
+        with io.open(object, 'rb') as f:
+            response = self.create(
+                full_url,
+                method='PUT',
+                data=f,
+            )
         url_parts = urlparse(self.endpoint)
         data = {
             'account': url_parts.path.split('/')[-1],

openstackclient/tests/api/test_object_store_v1.py

@@ -13,6 +13,8 @@
 
 """Object Store v1 API Library Tests"""
 
+import mock
+
 from requests_mock.contrib import fixture
 
 from keystoneclient import session
@@ -175,30 +177,41 @@ class TestObject(TestObjectAPIv1):
     def setUp(self):
         super(TestObject, self).setUp()
 
-    def test_object_create(self):
+    @mock.patch('openstackclient.api.object_store_v1.io.open')
+    def base_object_create(self, file_contents, mock_open):
+        mock_open.read.return_value = file_contents
+
         headers = {
             'etag': 'youreit',
             'x-trans-id': '1qaz2wsx',
         }
+        # TODO(dtroyer): When requests_mock gains the ability to
+        #                match against request.body add this check
+        #                https://review.openstack.org/127316
         self.requests_mock.register_uri(
             'PUT',
-            FAKE_URL + '/qaz/requirements.txt',
+            FAKE_URL + '/qaz/counter.txt',
             headers=headers,
+            # body=file_contents,
             status_code=201,
         )
         ret = self.api.object_create(
             container='qaz',
-            object='requirements.txt',
+            object='counter.txt',
         )
         data = {
             'account': FAKE_ACCOUNT,
             'container': 'qaz',
-            'object': 'requirements.txt',
+            'object': 'counter.txt',
             'etag': 'youreit',
             'x-trans-id': '1qaz2wsx',
         }
         self.assertEqual(data, ret)
 
+    def test_object_create(self):
+        self.base_object_create('111\n222\n333\n')
+        self.base_object_create(bytes([0x31, 0x00, 0x0d, 0x0a, 0x7f, 0xff]))
+
     def test_object_delete(self):
         self.requests_mock.register_uri(
             'DELETE',