chore: add a tox job to run blackblack-in-tox

Allow lines to be 88 chars long for flake8.

1 files changed, 10 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index b905c72..ac34542 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = py36,py35,py34,py27,pep8
+envlist = py36,py35,py34,py27,pep8,black
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}
@@ -18,11 +18,20 @@ commands =
 commands =
   flake8 {posargs} gitlab/
 
+[testenv:black]
+basepython = python3
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+       black
+commands =
+  black {posargs} gitlab
+
 [testenv:venv]
 commands = {posargs}
 
 [flake8]
 exclude = .git,.venv,.tox,dist,doc,*egg,build,
+max-line-length = 88
 ignore = H501,H803
 
 [testenv:docs]