Remove unittest2 framework

Makefile

@@ -48,14 +48,14 @@ uninstall:
 test-py2: build
 	# Unit tests with coverage report
 	coverage erase
-	coverage run --rcfile=./.coveragerc -m unittest2 discover -s tests/unit/ -p test_*_py2_py3.py
+	coverage run --rcfile=./.coveragerc -m unittest discover -s tests/unit/ -p test_*_py2_py3.py
 	coverage report --rcfile=./.coveragerc
 	coverage html --rcfile=./.coveragerc
 
 test: build
 	# Unit tests with coverage report
 	coverage erase
-	coverage run --rcfile=./.coveragerc -m unittest2 discover -s tests/unit/ -p test_*py3*.py
+	coverage run --rcfile=./.coveragerc -m unittest discover -s tests/unit/ -p test_*py3*.py
 	coverage report --rcfile=./.coveragerc
 	coverage html --rcfile=./.coveragerc
 

requirements-dev.txt

@@ -1,6 +1,5 @@
 cython==0.29.21
 tox
-unittest2
 coverage
 flake8
 pydocstyle

tests/unit/containers/test_declarative_py2_py3.py

@@ -1,7 +1,7 @@
 """Dependency injector declarative container unit tests."""
 
 import collections
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     containers,

tests/unit/containers/test_dynamic_async_resources_py36.py

@@ -1,6 +1,6 @@
 """Dependency injector dynamic container unit tests for async resources."""
 
-import unittest2 as unittest
+import unittest
 
 # Runtime import to get asyncutils module
 import os

tests/unit/containers/test_dynamic_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector dynamic container unit tests."""
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     containers,

tests/unit/ext/test_flask_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector Flask extension unit tests."""
 
-import unittest2 as unittest
+import unittest
 from flask import Flask, url_for
 from flask.views import MethodView
 

tests/unit/providers/test_base_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector base providers unit tests."""
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     containers,

tests/unit/providers/test_callables_py2_py3.py

@@ -2,7 +2,7 @@
 
 import sys
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     providers,

tests/unit/providers/test_configuration_py2_py3.py

@@ -6,7 +6,7 @@ import os
 import sys
 import tempfile
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import containers, providers, errors
 try:

tests/unit/providers/test_container_py2_py3.py

@@ -2,7 +2,7 @@
 
 import copy
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import containers, providers, errors
 

tests/unit/providers/test_coroutines_py35.py

@@ -2,7 +2,7 @@
 
 import asyncio
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     providers,

tests/unit/providers/test_dict_py2_py3.py

@@ -2,7 +2,7 @@
 
 import sys
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import providers
 

tests/unit/providers/test_factories_py2_py3.py

@@ -2,7 +2,7 @@
 
 import sys
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     providers,

tests/unit/providers/test_injections_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector injections unit tests."""
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import providers
 

tests/unit/providers/test_list_py2_py3.py

@@ -2,7 +2,7 @@
 
 import sys
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import providers
 

tests/unit/providers/test_provided_instance_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector provided instance provider unit tests."""
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import containers, providers
 

tests/unit/providers/test_resource_py35.py

@@ -2,7 +2,7 @@
 
 import asyncio
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import containers, providers, resources, errors
 

tests/unit/providers/test_selector_py2_py3.py

@@ -4,7 +4,7 @@ import functools
 import itertools
 import sys
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import providers, errors
 

tests/unit/providers/test_singletons_py2_py3.py

@@ -2,7 +2,7 @@
 
 import sys
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     providers,

tests/unit/providers/test_utils_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector provider utils unit tests."""
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import (
     providers,

tests/unit/test_common_py2_py3.py

@@ -1,6 +1,6 @@
 """Dependency injector common unit tests."""
 
-import unittest2 as unittest
+import unittest
 
 from dependency_injector import __version__
 

tox.ini

@@ -4,7 +4,6 @@ envlist=
 
 [testenv]
 deps=
-    unittest2
     # TODO: Hotfix, remove when fixed https://github.com/aio-libs/aiohttp/issues/5107
     typing_extensions
     httpx
@@ -15,7 +14,7 @@ extras=
     flask
     aiohttp
 commands=
-    unit2 discover -s tests/unit -p test_*_py3*.py
+    python -m unittest discover -s tests/unit -p test_*_py3*.py
 
 [testenv:coveralls]
 passenv = GITHUB_* COVERALLS_*
@@ -28,44 +27,40 @@ deps=
     coveralls
 commands=
     coverage erase
-    coverage run --rcfile=./.coveragerc -m unittest2 discover -s tests/unit/ -p test_*_py3*.py
+    coverage run --rcfile=./.coveragerc -m unittest discover -s tests/unit/ -p test_*_py3*.py
     coverage report --rcfile=./.coveragerc
     coveralls
 
 [testenv:2.7]
 deps=
-    unittest2
 extras=
     yaml
     flask
 commands=
-    unit2 discover -s tests/unit -p test_*_py2_py3.py
+    python -m unittest discover -s tests/unit -p test_*_py2_py3.py
 
 [testenv:3.4]
 deps=
-    unittest2
 extras=
     flask
 commands=
-    unit2 discover -s tests/unit -p test_*_py3.py
+    python -m unittest discover -s tests/unit -p test_*_py3.py
 
 [testenv:3.5]
 deps=
-    unittest2
 extras=
     yaml
     flask
 commands=
-    unit2 discover -s tests/unit -p test_*_py3.py
+    python -m unittest discover -s tests/unit -p test_*_py3.py
 
 [testenv:pypy2]
 deps=
-    unittest2
 extras=
     yaml
     flask
 commands=
-    unit2 discover -s tests/unit -p test_*_py2_py3.py
+    python -m unittest discover -s tests/unit -p test_*_py2_py3.py
 
 [testenv:pylint]
 deps=