Add tox configuration

Allows to run tests with python versions 2.6, 2.7 and 3.5:

  tox -e py26
  tox -e py27
  tox -e py35

and run the pyflakes and pep8 tests:

  tox -e pep8
  tox -e pyflakes

For now this works separately from the makefile invoked tests, but
will eventually replace that.

Change-Id: I148d06f3a907dd92f903474ac3d9af0342f90d52

.gitignore

@@ -3,6 +3,8 @@
 .pydevproject
 .settings
 .idea
+.tox
+.eggs
 build/
 dist/
 docs/

tox.ini

@@ -0,0 +1,25 @@
+[tox]
+minversion = 2.1.1
+envlist = pep8, py35, py27, py26
+
+[testenv]
+setenv = VIRTUAL_ENV={envdir}
+         SUBUNIT_FORMATTER=tee testr_subunit_log
+         OS_STDOUT_NOCAPTURE=False
+         LANG=en_US.UTF-8
+usedevelop = True
+install_command = pip install {opts} {packages}
+deps = -r{toxinidir}/test_requirements.txt
+commands = python unittests.py
+
+[testenv:pep8]
+commands = flake8
+
+[testenv:pyflakes]
+deps = pyflakes
+commands = pyflakes pygerrit2 unittests.py example.py setup.py
+
+[flake8]
+max-line-length = 80
+show-source = True
+exclude = .venv,.tox,dist,doc,build,*.egg,.test,pygerrit2env