--- /dev/null
+# Copyright 2021 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: legal@canonical.com
+#
+# To get in touch with the maintainers, please contact:
+# osm-charmers@lists.launchpad.net
+##
+#######################################################################################
+
+[tox]
+envlist = black, cover, flake8, pylint, yamllint, safety
+skipsdist = true
+
+[tox:jenkins]
+toxworkdir = /tmp/.tox
+
+[testenv]
+basepython = python3.8
+setenv = VIRTUAL_ENV={envdir}
+ PYTHONDONTWRITEBYTECODE = 1
+deps = -r{toxinidir}/requirements.txt
+
+
+#######################################################################################
+[testenv:black]
+deps = black
+commands =
+ black --check --diff src/ tests/
+
+
+#######################################################################################
+[testenv:cover]
+deps = {[testenv]deps}
+ -r{toxinidir}/requirements-test.txt
+ coverage
+ nose2
+commands =
+ sh -c 'rm -f nosetests.xml'
+ coverage erase
+ nose2 -C --coverage src
+ coverage report --omit='*tests*'
+ coverage html -d ./cover --omit='*tests*'
+ coverage xml -o coverage.xml --omit=*tests*
+whitelist_externals = sh
+
+
+#######################################################################################
+[testenv:flake8]
+deps = flake8
+ flake8-import-order
+commands =
+ flake8 src/ tests/
+
+
+#######################################################################################
+[testenv:pylint]
+deps = {[testenv]deps}
+ -r{toxinidir}/requirements-test.txt
+ pylint==2.10.2
+commands =
+ pylint -E src/ tests/
+
+
+#######################################################################################
+[testenv:safety]
+setenv =
+ LC_ALL=C.UTF-8
+ LANG=C.UTF-8
+deps = {[testenv]deps}
+ safety
+commands =
+ - safety check --full-report
+
+
+#######################################################################################
+[testenv:yamllint]
+deps = {[testenv]deps}
+ -r{toxinidir}/requirements-test.txt
+ yamllint
+commands = yamllint .
+
+#######################################################################################
+[testenv:build]
+passenv=HTTP_PROXY HTTPS_PROXY NO_PROXY
+whitelist_externals =
+ charmcraft
+ sh
+commands =
+ charmcraft pack
+ sh -c 'ubuntu_version=20.04; \
+ architectures="amd64-aarch64-arm64"; \
+ charm_name=`cat metadata.yaml | grep -E "^name: " | cut -f 2 -d " "`; \
+ mv $charm_name"_ubuntu-"$ubuntu_version-$architectures.charm $charm_name.charm'
+
+#######################################################################################
+[flake8]
+ignore =
+ W291,
+ W293,
+ W503,
+ E123,
+ E125,
+ E226,
+ E241,
+exclude =
+ .git,
+ __pycache__,
+ .tox,
+max-line-length = 120
+show-source = True
+builtins = _
+max-complexity = 10
+import-order-style = google