add placeholder for testings

Testing/tox.ini

@@ -0,0 +1,47 @@
+[tox]
+envlist =
+ lint,py27,py35,py36,py37,py38,pypy,pypy3,docs,coverage-report,flake8,spelling
+
+
+[testenv:coverage-report]
+basepython = python3.7
+skip_install = true
+deps = coverage[toml]>=5.0.2
+commands =
+    coverage combine
+    coverage report
+
+
+[pipupgrade]
+commands =
+  {envpython} -m pip install --upgrade pip
+
+
+[testenv:docs]
+changedir = {toxinidir}/docs
+commands =
+  {[pipupgrade]commands}
+  sphinx-build -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
+  {[cleanup]commands}
+deps =
+  sphinx
+  sphinx_rtd_theme
+
+
+[cleanup]
+commands =
+  find {toxinidir}/tests -type f -name "*.pyc" -delete
+  find {toxinidir}/tests -type d -name "__pycache__" -delete
+  find {toxinidir}/src -type f -name "*.pyc" -delete
+  find {toxinidir}/src -type d -name "__pycache__" -delete
+  find {toxinidir}/src -type f -path "*.egg-info*" -delete
+  find {toxinidir}/src -type d -path "*.egg-info" -delete
+
+
+[testenv:flake8]
+changedir = {toxinidir}
+deps = flake8
+commands =
+  {[pipupgrade]commands}
+  flake8 {toxinidir}/src/django_registration {toxinidir}/tests
+  {[cleanup]commands}