Bump minimum Swift requirement to Ocata stable

And this also removes redundant code to support Swift < 2.6.0.

Change-Id: I978f9dcc1433f66e62cab76a05525714eba75c64

requirements.txt

@@ -1,4 +1,4 @@
-swift>=2.1.0
+swift>=2.13.0
 lxml
 requests!=2.9.0,>=2.8.1 # Apache-2.0
 six>=1.9.0

swift3/controllers/multi_upload.py

@@ -566,11 +566,9 @@ class UploadController(Controller):
         if manifest[-1]['size_bytes'] == 0:
             empty_seg = manifest.pop()
 
-            # Ordinarily, we just let SLO check segment sizes. However, we
-            # just popped off a zero-byte segment; if there was a second
-            # zero-byte segment and it was at the end, it would succeed on
-            # Swift < 2.6.0 and fail on newer Swift. It seems reasonable that
-            # it should always fail.
+            # We'll check the sizes of all except the last segment below, but
+            # since we just popped off a zero-byte segment, we should check
+            # that last segment, too.
             if manifest and manifest[-1]['size_bytes'] < CONF.min_segment_size:
                 raise EntityTooSmall()
 
@@ -594,14 +592,8 @@ class UploadController(Controller):
                                         headers=headers)
         except BadSwiftRequest as e:
             msg = str(e)
-            msg_pre_260 = 'Each segment, except the last, must be at least '
-            # see https://github.com/openstack/swift/commit/c0866ce
-            msg_260 = ('too small; each segment, except the last, must be '
-                       'at least ')
-            # see https://github.com/openstack/swift/commit/7f636a5
-            msg_post_260 = 'too small; each segment must be at least 1 byte'
-            if msg.startswith(msg_pre_260) or \
-                    msg_260 in msg or msg_post_260 in msg:
+            expected_msg = 'too small; each segment must be at least 1 byte'
+            if expected_msg in msg:
                 # FIXME: AWS S3 allows a smaller object than 5 MB if there is
                 # only one part.  Use a COPY request to copy the part object
                 # from the segments container instead.

swift3/test/unit/test_multi_upload.py

@@ -652,30 +652,21 @@ class TestSwift3MultiUpload(Swift3TestCase):
         self.assertEqual(headers.get('X-Object-Meta-Foo'), 'bar')
 
     def test_object_multipart_upload_complete_segment_too_small(self):
-        msgs = [
-            # pre-2.6.0 swift
-            'Each segment, except the last, must be at least 1234 bytes.',
-            # swift 2.6.0
-            'Index 0: too small; each segment, except the last, must be '
-            'at least 1234 bytes.',
-            # swift 2.7.0+
-            'Index 0: too small; each segment must be at least 1 byte.',
-        ]
+        msg = 'Index 0: too small; each segment must be at least 1 byte.'
 
-        for msg in msgs:
-            req = Request.blank(
-                '/bucket/object?uploadId=X',
-                environ={'REQUEST_METHOD': 'POST'},
-                headers={'Authorization': 'AWS test:tester:hmac',
-                         'Date': self.get_date_header(), },
-                body=xml)
+        req = Request.blank(
+            '/bucket/object?uploadId=X',
+            environ={'REQUEST_METHOD': 'POST'},
+            headers={'Authorization': 'AWS test:tester:hmac',
+                     'Date': self.get_date_header(), },
+            body=xml)
 
-            self.swift.register('PUT', '/v1/AUTH_test/bucket/object',
-                                swob.HTTPBadRequest, {}, msg)
-            status, headers, body = self.call_swift3(req)
-            self.assertEqual(status.split()[0], '400')
-            self.assertEqual(self._get_error_code(body), 'EntityTooSmall')
-            self.assertEqual(self._get_error_message(body), msg)
+        self.swift.register('PUT', '/v1/AUTH_test/bucket/object',
+                            swob.HTTPBadRequest, {}, msg)
+        status, headers, body = self.call_swift3(req)
+        self.assertEqual(status.split()[0], '400')
+        self.assertEqual(self._get_error_code(body), 'EntityTooSmall')
+        self.assertEqual(self._get_error_message(body), msg)
 
         self.swift.clear_calls()
         CONF.min_segment_size = 5242880

tox.ini

@@ -7,10 +7,10 @@ skipsdist = True
 whitelist_externals =/bin/bash
 usedevelop = True
 install_command = pip install {opts} {packages}
-# swift 2.7.0 from github
+# swift stable/ocata (about 2.13.0) from openstack.org
 deps =
   -r{toxinidir}/test-requirements.txt
-  http://tarballs.openstack.org/swift/swift-2.7.0.tar.gz
+  http://tarballs.openstack.org/swift/swift-stable-ocata.tar.gz
 commands = nosetests {posargs:swift3/test/unit}
 setenv = VIRTUAL_ENV={envdir}
          NOSE_WITH_OPENSTACK=1