Adds a tox.ini file and instructions in the readme for how to use it.

README.md

@@ -51,6 +51,21 @@ The easiest way to run test coverage is with [`coverage`](https://pypi.org/proje
 which runs the tests against all supported Django installs. To run the test coverage 
 within a virtualenv, run `coverage run ./runtests.py` from the repository directory then run `coverage report`.
 
+#### Tox
+
+Testing may also be done using [`tox`](https://pypi.org/project/tox/), which
+will run the tests against all supported combinations of python and django.
+
+Install tox, either globally or within a virtualenv, and then simply run `tox`
+from the repository directory. As there are many combinations, you may run them
+in [`parallel`](https://tox.readthedocs.io/en/latest/config.html#cmdoption-tox-p)
+using `tox --parallel`.
+
+The `tox.ini` includes an environment for testing code [`coverage`](https://pypi.org/project/coverage/)
+and you can run it and view this report with `tox -e coverage`.
+
+Linting may also be performed via [`flake8`](https://pypi.org/project/flake8/)
+by running `tox -e flake8`.
 
 ### Documentation
 

dj_rest_auth/app_settings.py

@@ -33,6 +33,8 @@ PasswordResetConfirmSerializer = import_callable(serializers.get(
     'PASSWORD_RESET_CONFIRM_SERIALIZER', DefaultPasswordResetConfirmSerializer
 ))
 
-PasswordChangeSerializer = import_callable(serializers.get('PASSWORD_CHANGE_SERIALIZER', DefaultPasswordChangeSerializer))
+PasswordChangeSerializer = import_callable(
+    serializers.get('PASSWORD_CHANGE_SERIALIZER', DefaultPasswordChangeSerializer)
+)
 
 JWT_AUTH_COOKIE = getattr(settings, 'JWT_AUTH_COOKIE', None)

dj_rest_auth/registration/serializers.py

@@ -17,7 +17,6 @@ except ImportError:
     raise ImportError("allauth needs to be added to INSTALLED_APPS.")
 
 
-
 class SocialAccountSerializer(serializers.ModelSerializer):
     """
     serialize allauth SocialAccounts for use with a REST API

dj_rest_auth/tests/urls.py

@@ -21,7 +21,6 @@ from . import django_urls
 class ExampleProtectedView(APIView):
     permission_classes = [permissions.IsAuthenticated]
 
-
     def get(self, *args, **kwargs):
         return Response(dict(success=True))
 

dj_rest_auth/views.py

@@ -146,7 +146,6 @@ class LogoutView(APIView):
             from rest_framework_simplejwt.exceptions import TokenError
             from rest_framework_simplejwt.tokens import RefreshToken
 
-
             cookie_name = getattr(settings, 'JWT_AUTH_COOKIE', None)
             if cookie_name:
                 response.delete_cookie(cookie_name)

tox.ini

@@ -0,0 +1,37 @@
+# tox (https://tox.readthedocs.io/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+# Running this tox will test against all supported version 
+# combinations of python and django as described at the following
+# https://docs.djangoproject.com/en/3.0/faq/install/#what-python-version-can-i-use-with-django
+# https://endoflife.date/django
+[tox]
+skipsdist = true
+envlist =
+    python{3.5,3.6,3.7,3.8}-django22
+    python{3.6,3.7,3.8}-django30
+
+[testenv]
+commands =
+    python ./runtests.py
+deps =
+    -rdev-requirements.txt
+    django22: Django>=2.2,<2.3
+    django30: Django>=3.0,<3.1
+
+# Configuration for coverage and flake8 is being set in `./setup.cfg`
+[testenv:coverage]
+commands =
+    coverage run ./runtests.py
+    coverage report
+deps =
+    -rdev-requirements.txt
+
+[testenv:flake8]
+changedir = {toxinidir}/dj_rest_auth
+commands =
+    flake8 .
+deps =
+    flake8==3.8.1