Add tox and gitlab CI

.coveragerc

@@ -3,3 +3,4 @@ omit =
     setup.py
     federation/__init__.py
     */tests/*
+    .tox/*

.gitlab-ci.yml

@@ -0,0 +1,30 @@
+# This file is a template, and might need editing before it works on your project.
+# Official language image. Look for the different tagged releases at:
+# https://hub.docker.com/r/library/python/tags/
+image: python:3.6
+
+# Change pip's cache directory to be inside the project directory since we can
+# only cache local items.
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache"
+
+# Pip's cache doesn't store the python packages
+# https://pip.pypa.io/en/stable/reference/pip_install/#caching
+#
+# If you want to also cache the installed packages, you have to install
+# them in a virtualenv and cache it as well.
+cache:
+  paths:
+    - .cache/pip
+    - venv/
+
+before_script:
+  - python -V
+  - pip install virtualenv
+  - virtualenv venv
+  - source venv/bin/activate
+
+test:
+  script:
+  - pip install tox
+  - tox

dev-requirements.txt

@@ -10,6 +10,7 @@ codecov
 coverage
 pytest-cov
 pytest-warnings
+tox
 
 # Docs
 sphinx

tox.ini

@@ -0,0 +1,17 @@
+# 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.
+
+[tox]
+envlist = py36
+
+[testenv]
+usedevelop = True
+
+deps = -rdev-requirements.txt
+
+commands =
+    pip freeze
+    pytest --cov=./
+    #codecov