Drop support for Python 2.6

Because it's ancient. If you're still using it, you can use an old
version of docker-py.

Signed-off-by: Ben Firshman <ben@firshman.co.uk>

.travis.yml

@@ -3,7 +3,6 @@ language: python
 python:
   - "3.5"
 env:
-    - TOX_ENV=py26
     - TOX_ENV=py27
     - TOX_ENV=py33
     - TOX_ENV=py34

setup.py

@@ -64,7 +64,6 @@
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.3',

tests/unit/api_test.py

@@ -1,21 +1,20 @@
 import datetime
 import json
+import io
 import os
 import re
 import shutil
 import socket
-import sys
 import tempfile
 import threading
 import time
-import io
+import unittest
 
 import docker
 import requests
 from requests.packages import urllib3
 import six
 
-from .. import base
 from . import fake_api
 
 import pytest
@@ -93,7 +92,7 @@ def fake_read_from_socket(self, response, stream):
     docker.constants.DEFAULT_DOCKER_API_VERSION)
 
 
-class DockerClientTest(base.Cleanup, base.BaseTestCase):
+class DockerClientTest(unittest.TestCase):
     def setUp(self):
         self.patcher = mock.patch.multiple(
             'docker.Client', get=fake_get, post=fake_post, put=fake_put,
@@ -109,11 +108,6 @@ def tearDown(self):
         self.client.close()
         self.patcher.stop()
 
-    def assertIn(self, object, collection):
-        if six.PY2 and sys.version_info[1] <= 6:
-            return self.assertTrue(object in collection)
-        return super(DockerClientTest, self).assertIn(object, collection)
-
     def base_create_payload(self, img='busybox', cmd=None):
         if not cmd:
             cmd = ['true']
@@ -356,7 +350,7 @@ def test_stream_helper_decoding(self):
         self.assertEqual(result, content)
 
 
-class StreamTest(base.Cleanup, base.BaseTestCase):
+class StreamTest(unittest.TestCase):
     def setUp(self):
         socket_dir = tempfile.mkdtemp()
         self.build_context = tempfile.mkdtemp()
@@ -458,7 +452,7 @@ def test_early_stream_response(self):
                 str(i).encode() for i in range(50)])
 
 
-class UserAgentTest(base.BaseTestCase):
+class UserAgentTest(unittest.TestCase):
     def setUp(self):
         self.patcher = mock.patch.object(
             docker.Client,

tests/unit/auth_test.py

@@ -7,18 +7,17 @@
 import random
 import shutil
 import tempfile
+import unittest
 
 from docker import auth, errors
 
-from .. import base
-
 try:
     from unittest import mock
 except ImportError:
     import mock
 
 
-class RegressionTest(base.BaseTestCase):
+class RegressionTest(unittest.TestCase):
     def test_803_urlsafe_encode(self):
         auth_data = {
             'username': 'root',
@@ -29,7 +28,7 @@ def test_803_urlsafe_encode(self):
         assert b'_' in encoded
 
 
-class ResolveRepositoryNameTest(base.BaseTestCase):
+class ResolveRepositoryNameTest(unittest.TestCase):
     def test_resolve_repository_name_hub_library_image(self):
         self.assertEqual(
             auth.resolve_repository_name('image'),
@@ -115,7 +114,7 @@ def encode_auth(auth_info):
         auth_info.get('password', '').encode('utf-8'))
 
 
-class ResolveAuthTest(base.BaseTestCase):
+class ResolveAuthTest(unittest.TestCase):
     index_config = {'auth': encode_auth({'username': 'indexuser'})}
     private_config = {'auth': encode_auth({'username': 'privateuser'})}
     legacy_config = {'auth': encode_auth({'username': 'legacyauth'})}
@@ -270,7 +269,7 @@ def test_resolve_registry_and_auth_unauthenticated_registry(self):
         )
 
 
-class LoadConfigTest(base.Cleanup, base.BaseTestCase):
+class LoadConfigTest(unittest.TestCase):
     def test_load_config_no_file(self):
         folder = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, folder)

tests/unit/client_test.py

@@ -1,14 +1,15 @@
 import os
+import unittest
+
 from docker.client import Client
-from .. import base
 
 TEST_CERT_DIR = os.path.join(
     os.path.dirname(__file__),
     'testdata/certs',
 )
 
 
-class ClientTest(base.BaseTestCase):
+class ClientTest(unittest.TestCase):
     def setUp(self):
         self.os_environ = os.environ.copy()
 
@@ -34,7 +35,7 @@ def test_from_env_with_version(self):
         self.assertEqual(client._version, '2.32')
 
 
-class DisableSocketTest(base.BaseTestCase):
+class DisableSocketTest(unittest.TestCase):
     class DummySocket(object):
         def __init__(self, timeout=60):
             self.timeout = timeout

tests/unit/network_test.py

@@ -2,8 +2,8 @@
 
 import six
 
-from ..helpers import requires_api_version
 from .api_test import DockerClientTest, url_prefix, response
+from ..helpers import requires_api_version
 from docker.utils import create_ipam_config, create_ipam_pool
 
 try:

tests/unit/ssladapter_test.py

@@ -1,3 +1,4 @@
+import unittest
 from docker import ssladapter
 
 try:
@@ -16,10 +17,8 @@
     OP_NO_SSLv3 = 0x2000000
     OP_NO_TLSv1 = 0x4000000
 
-from .. import base
 
-
-class SSLAdapterTest(base.BaseTestCase):
+class SSLAdapterTest(unittest.TestCase):
     def test_only_uses_tls(self):
         ssl_context = ssladapter.urllib3.util.ssl_.create_urllib3_context()
 
@@ -29,7 +28,7 @@ def test_only_uses_tls(self):
         assert not ssl_context.options & OP_NO_TLSv1
 
 
-class MatchHostnameTest(base.BaseTestCase):
+class MatchHostnameTest(unittest.TestCase):
     cert = {
         'issuer': (
             (('countryName', u'US'),),

tests/unit/utils_test.py

@@ -8,6 +8,7 @@
 import sys
 import tarfile
 import tempfile
+import unittest
 
 import pytest
 import six
@@ -28,7 +29,6 @@
 from docker.utils.ports import build_port_bindings, split_port
 from docker.utils.utils import create_endpoint_config, format_environment
 
-from .. import base
 from ..helpers import make_tree
 
 
@@ -38,7 +38,7 @@
 )
 
 
-class DecoratorsTest(base.BaseTestCase):
+class DecoratorsTest(unittest.TestCase):
     def test_update_headers(self):
         sample_headers = {
             'X-Docker-Locale': 'en-US',
@@ -69,7 +69,7 @@ def f(self, headers=None):
         }
 
 
-class HostConfigTest(base.BaseTestCase):
+class HostConfigTest(unittest.TestCase):
     def test_create_host_config_no_options(self):
         config = create_host_config(version='1.19')
         self.assertFalse('NetworkMode' in config)
@@ -208,7 +208,7 @@ def test_create_host_config_with_isolation(self):
             )
 
 
-class UlimitTest(base.BaseTestCase):
+class UlimitTest(unittest.TestCase):
     def test_create_host_config_dict_ulimit(self):
         ulimit_dct = {'name': 'nofile', 'soft': 8096}
         config = create_host_config(
@@ -253,7 +253,7 @@ def test_ulimit_invalid_type(self):
         self.assertRaises(ValueError, lambda: Ulimit(name='hello', hard='456'))
 
 
-class LogConfigTest(base.BaseTestCase):
+class LogConfigTest(unittest.TestCase):
     def test_create_host_config_dict_logconfig(self):
         dct = {'type': LogConfig.types.SYSLOG, 'config': {'key1': 'val1'}}
         config = create_host_config(
@@ -277,7 +277,7 @@ def test_logconfig_invalid_config_type(self):
             LogConfig(type=LogConfig.types.JSON, config='helloworld')
 
 
-class KwargsFromEnvTest(base.BaseTestCase):
+class KwargsFromEnvTest(unittest.TestCase):
     def setUp(self):
         self.os_environ = os.environ.copy()
 
@@ -377,7 +377,7 @@ def test_kwargs_from_env_alternate_env(self):
         assert 'tls' not in kwargs
 
 
-class ConverVolumeBindsTest(base.BaseTestCase):
+class ConverVolumeBindsTest(unittest.TestCase):
     def test_convert_volume_binds_empty(self):
         self.assertEqual(convert_volume_binds({}), [])
         self.assertEqual(convert_volume_binds([]), [])
@@ -436,7 +436,7 @@ def test_convert_volume_binds_unicode_unicode_input(self):
         )
 
 
-class ParseEnvFileTest(base.BaseTestCase):
+class ParseEnvFileTest(unittest.TestCase):
     def generate_tempfile(self, file_content=None):
         """
         Generates a temporary file for tests with the content
@@ -479,7 +479,7 @@ def test_parse_env_file_invalid_line(self):
         os.unlink(env_file)
 
 
-class ParseHostTest(base.BaseTestCase):
+class ParseHostTest(unittest.TestCase):
     def test_parse_host(self):
         invalid_hosts = [
             '0.0.0.0',
@@ -541,7 +541,7 @@ def test_parse_host_trailing_slash(self):
         assert parse_host(host_value) == expected_result
 
 
-class ParseRepositoryTagTest(base.BaseTestCase):
+class ParseRepositoryTagTest(unittest.TestCase):
     sha = 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
 
     def test_index_image_no_tag(self):
@@ -587,7 +587,7 @@ def test_private_reg_image_sha(self):
         )
 
 
-class ParseDeviceTest(base.BaseTestCase):
+class ParseDeviceTest(unittest.TestCase):
     def test_dict(self):
         devices = parse_devices([{
             'PathOnHost': '/dev/sda1',
@@ -646,7 +646,7 @@ def test_hybrid_list(self):
         })
 
 
-class ParseBytesTest(base.BaseTestCase):
+class ParseBytesTest(unittest.TestCase):
     def test_parse_bytes_valid(self):
         self.assertEqual(parse_bytes("512MB"), 536870912)
         self.assertEqual(parse_bytes("512M"), 536870912)
@@ -666,7 +666,7 @@ def test_parse_bytes_maxint(self):
         )
 
 
-class UtilsTest(base.BaseTestCase):
+class UtilsTest(unittest.TestCase):
     longMessage = True
 
     def test_convert_filters(self):
@@ -706,7 +706,7 @@ def test_create_ipam_config(self):
         })
 
 
-class SplitCommandTest(base.BaseTestCase):
+class SplitCommandTest(unittest.TestCase):
     def test_split_command_with_unicode(self):
         self.assertEqual(split_command(u'echo μμ'), ['echo', 'μμ'])
 
@@ -715,7 +715,7 @@ def test_split_command_with_bytes(self):
         self.assertEqual(split_command('echo μμ'), ['echo', 'μμ'])
 
 
-class PortsTest(base.BaseTestCase):
+class PortsTest(unittest.TestCase):
     def test_split_port_with_host_ip(self):
         internal_port, external_port = split_port("127.0.0.1:1000:2000")
         self.assertEqual(internal_port, ["2000"])
@@ -821,14 +821,13 @@ def test_build_port_bindings_with_nonmatching_internal_port_ranges(self):
         self.assertEqual(port_bindings["1000"], [("127.0.0.1", "1000")])
         self.assertEqual(port_bindings["2000"], [("127.0.0.1", "2000")])
 
-
 def convert_paths(collection):
     if not IS_WINDOWS_PLATFORM:
         return collection
     return set(map(lambda x: x.replace('/', '\\'), collection))
 
 
-class ExcludePathsTest(base.BaseTestCase):
+class ExcludePathsTest(unittest.TestCase):
     dirs = [
         'foo',
         'foo/bar',
@@ -1010,7 +1009,7 @@ def test_subdirectory(self):
         )
 
 
-class TarTest(base.Cleanup, base.BaseTestCase):
+class TarTest(unittest.TestCase):
     def test_tar_with_excludes(self):
         dirs = [
             'foo',