Add tox.ini

Author: tucked

tox.ini

@@ -0,0 +1,12 @@
+[tox]
+minversion = 3.7.0
+isolated_build = true
+envlist = py{27,35,36,37}
+
+[testenv]
+deps =
+    pytest ~= 4.4.1
+    pytest-cov ~= 2.6.1
+    pytest-randomly ~= 1.2.3
+commands =
+    pytest --pyargs combtest.test --cov combtest {posargs}