remove six dependency (#324)

remove six dependency

This requires adjustments to exception handling in
fixtures to properly re-raise them.

gabbi/case.py

@@ -20,16 +20,15 @@
 from collections import OrderedDict
 import copy
 import functools
+from http import cookies
 import os
 import re
 import sys
 import time
 import unittest
 from unittest import result as unitresult
+import urllib.parse as urlparse
 
-import six
-from six.moves import http_cookies
-from six.moves.urllib import parse as urlparse
 import wsgi_intercept
 
 from gabbi import __version__
@@ -298,10 +297,10 @@ def _cookie_replacer(self, match):
             referred_case = self.history[case]
         else:
             referred_case = self.prior
-        response_cookies = referred_case.response['set-cookie']
-        cookies = http_cookies.SimpleCookie()
-        cookies.load(response_cookies)
-        cookie_string = cookies.output(attrs=[], header='', sep=',').strip()
+        response_cookie = referred_case.response['set-cookie']
+        cookie = cookies.SimpleCookie()
+        cookie.load(response_cookie)
+        cookie_string = cookie.output(attrs=[], header='', sep=',').strip()
         return cookie_string
 
     def _headers_replace(self, message, escape_regex=False):
@@ -482,7 +481,7 @@ def _response_replacer(self, match, preserve=False):
                 return self._cast_value(result, match.string)
             return result
         else:
-            return six.text_type(result)
+            return str(result)
 
     def _run_request(
         self,
@@ -514,8 +513,8 @@ def _run_request(
             )
         except wsgi_intercept.WSGIAppError as exc:
             # Extract and re-raise the wrapped exception.
-            six.reraise(exc.exception_type, exc.exception_value,
-                        exc.traceback)
+            raise (exc.exception_type, exc.exception_value,
+                   exc.traceback)
 
         # Set headers and location attributes for follow on requests
         self.response = response
@@ -582,7 +581,7 @@ def _run_test(self):
 
         # ensure body is bytes, encoding as UTF-8 because that's
         # what we do here
-        if isinstance(body, six.text_type):
+        if isinstance(body, str):
             body = body.encode('UTF-8')
 
         if test['poll']:
@@ -637,10 +636,10 @@ def _test_data_to_string(self, data, content_type):
         """
         dumper_class = self.get_content_handler(content_type)
         if not _is_complex_type(data):
-            if isinstance(data, six.string_types) and data.startswith('<@'):
+            if isinstance(data, str) and data.startswith('<@'):
                 info = self.load_data_file(data.replace('<@', '', 1))
                 if utils.not_binary(content_type):
-                    data = six.text_type(info, 'UTF-8')
+                    data = str(info, 'UTF-8')
                 else:
                     # Return early we are binary content
                     return info
@@ -661,7 +660,7 @@ def _test_data_to_string(self, data, content_type):
 
         # If the result after template handling is not a string, dump
         # it if there is a suitable dumper.
-        if dumper_class and not isinstance(data, six.string_types):
+        if dumper_class and not isinstance(data, str):
             # If there are errors dumping we want them to raise to the
             # test harness.
             data = dumper_class.dumps(data, test=self)

gabbi/fixture.py

@@ -16,15 +16,13 @@
 import sys
 from unittest import case
 
-import six
-
 
 class GabbiFixtureError(Exception):
     """Generic exception for GabbiFixture."""
     pass
 
 
-class GabbiFixture(object):
+class GabbiFixture:
     """A context manager that operates as a fixture.
 
     Subclasses must implement ``start_fixture`` and ``stop_fixture``, each
@@ -97,4 +95,4 @@ def nest(fixtures):
             except Exception:
                 exc = sys.exc_info()
         if exc != (None, None, None):
-            six.reraise(exc[0], exc[1], exc[2])
+            raise exc[1].with_traceback(exc[2])

gabbi/handlers/base.py

@@ -15,7 +15,7 @@
 from gabbi.exception import GabbiFormatError
 
 
-class ResponseHandler(object):
+class ResponseHandler:
     """Add functionality for making assertions about an HTTP response.
 
     A subclass may implement two methods: ``action`` and ``preprocess``.

gabbi/handlers/jsonhandler.py

@@ -14,8 +14,6 @@
 
 import json
 
-import six
-
 from gabbi.exception import GabbiDataLoadError
 from gabbi.handlers import base
 from gabbi import json_parser
@@ -68,7 +66,7 @@ def loads(data):
     @staticmethod
     def load_data_file(test, file_path):
         info = test.load_data_file(file_path)
-        info = six.text_type(info, 'UTF-8')
+        info = str(info, 'UTF-8')
         return json.loads(info)
 
     @staticmethod
@@ -103,7 +101,7 @@ def action(self, test, path, value=None):
                                  '%s' % (path, test.response_data))
 
         # read data from disk if the value starts with '<@'
-        if isinstance(value, six.string_types) and value.startswith('<@'):
+        if isinstance(value, str) and value.startswith('<@'):
             # Do template expansion in the rhs if rhs_path is provided.
             if ':' in value:
                 value, rhs_path = value.split(':$', 1)
@@ -120,7 +118,7 @@ def action(self, test, path, value=None):
                                          'match %s' % (rhs_path, value))
 
         # If expected is a string, check to see if it is a regex.
-        is_regex = (isinstance(value, six.string_types) and
+        is_regex = (isinstance(value, str) and
                     value.startswith('/') and
                     value.endswith('/') and
                     len(value) > 1)
@@ -130,7 +128,7 @@ def action(self, test, path, value=None):
         if is_regex and not rhs_match:
             expected = expected[1:-1]
             # match may be a number so stringify
-            match = six.text_type(match)
+            match = str(match)
             test.assertRegex(
                 match, expected,
                 'Expect jsonpath %s to match /%s/, got %s' %

gabbi/handlers/yaml_disk_loading_jsonhandler.py

@@ -14,8 +14,6 @@
 
 import yaml
 
-import six
-
 from gabbi.handlers import jsonhandler
 
 
@@ -36,5 +34,5 @@ class YAMLDiskLoadingJSONHandler(jsonhandler.JSONHandler):
     @staticmethod
     def load_data_file(test, file_path):
         info = test.load_data_file(file_path)
-        info = six.text_type(info, 'UTF-8')
+        info = str(info, 'UTF-8')
         return yaml.safe_load(info)

gabbi/httpclient.py

@@ -11,13 +11,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from __future__ import print_function
-
 import os
 import sys
 
 import certifi
-import six
 import urllib3
 
 from gabbi.handlers import jsonhandler
@@ -154,7 +151,7 @@ def _print_body(self, headers, content):
         content_type = utils.extract_content_type(headers, 'text/plain')[0]
         if self._show_body and utils.not_binary(content_type):
             content = utils.decode_response_content(headers, content)
-            if isinstance(content, six.binary_type):
+            if isinstance(content, bytes):
                 content = content.decode('utf-8')
             # TODO(cdent): Using the JSONHandler here instead of
             # just the json module to make it clear that eventually

gabbi/runner.py

@@ -12,8 +12,6 @@
 # under the License.
 """Implementation of a command-line runner for gabbi files (AKA suites)."""
 
-from __future__ import print_function
-
 import argparse
 from importlib import import_module
 import os

gabbi/suitemaker.py

@@ -27,7 +27,7 @@
 from gabbi import suite
 
 
-class TestMaker(object):
+class TestMaker:
     """A class for encapsulating test invariants.
 
     All of the tests in a single gabbi file have invariants which are

gabbi/tests/__init__.py

@@ -1,16 +0,0 @@
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import six
-
-six.add_move(six.MovedModule('mock', 'mock', 'unittest.mock'))

gabbi/tests/simple_wsgi.py

@@ -16,15 +16,14 @@
 """
 
 import json
-
-from six.moves.urllib import parse as urlparse
+import urllib.parse as urlparse
 
 
 CURRENT_POLL = 0
 METHODS = ['GET', 'PUT', 'POST', 'DELETE', 'PATCH']
 
 
-class SimpleWsgi(object):
+class SimpleWsgi:
     """A simple wsgi application to use in tests."""
 
     def __call__(self, environ, start_response):

gabbi/tests/test_fixtures.py

@@ -14,8 +14,7 @@
 """
 
 import unittest
-
-from six.moves import mock
+from unittest import mock
 
 from gabbi import fixture
 

gabbi/tests/test_inner_fixture.py

@@ -43,7 +43,7 @@ def stop_fixture(self):
         assert COUNT_OUTER == 1
 
 
-class InnerFixture(object):
+class InnerFixture:
     """Test that setUp is called 3 times."""
 
     def setUp(self):

gabbi/tests/test_load_data_file.py

@@ -14,8 +14,7 @@
 """
 
 import unittest
-
-from six.moves import mock
+from unittest import mock
 
 from gabbi import case
 

gabbi/tests/test_runner.py

@@ -13,11 +13,11 @@
 """Test that the CLI works as expected
 """
 
+from io import StringIO
 import sys
 import unittest
 from uuid import uuid4
 
-from six import StringIO
 from wsgi_intercept.interceptor import Urllib3Interceptor
 
 from gabbi import exception

gabbi/tests/test_suite.py

@@ -20,6 +20,7 @@
 from gabbi import suitemaker
 
 VALUE_ERROR = 'value error sentinel'
+FIXTURE_METHOD = 'start_fixture'
 
 
 class FakeFixture(fixture.GabbiFixture):
@@ -54,3 +55,4 @@ def test_suite_catches_fixture_fail(self):
 
         self.assertIn('foo_alpha', str(errored_test))
         self.assertIn(VALUE_ERROR, trace)
+        self.assertIn(FIXTURE_METHOD, trace)

gabbi/tests/test_use_prior_test.py

@@ -15,8 +15,7 @@
 
 import copy
 import unittest
-
-from six.moves import mock
+from unittest import mock
 
 from gabbi import case
 

gabbi/utils.py

@@ -14,18 +14,12 @@
 
 import io
 import os
+import urllib.parse as urlparse
 
 import colorama
-import six
-from six.moves.urllib import parse as urlparse
 import yaml
 
-
-try:  # Python 3
-    ConnectionRefused = ConnectionRefusedError
-except NameError:  # Python 2
-    import socket
-    ConnectionRefused = socket.error
+ConnectionRefused = ConnectionRefusedError
 
 
 def create_url(base_url, host, port=None, prefix='', ssl=False):
@@ -72,7 +66,7 @@ def decode_response_content(header_dict, content):
     """Decode content to a proper string."""
     content_type, charset = extract_content_type(header_dict)
 
-    if not_binary(content_type) and isinstance(content, six.binary_type):
+    if not_binary(content_type) and isinstance(content, bytes):
         return content.decode(charset)
     else:
         return content

requirements.txt

@@ -1,6 +1,5 @@
 pbr
 pytest
-six
 PyYAML
 urllib3>=1.26.9,<2.0.0
 certifi