Improved tox configuration

tox.ini is now similar to the one from Nailgun's code:
 * renamed 'pep8' env
 * added 'venv' env to run any command
 * replaced pep8 script with flake8
 * flake8 conf inside tox.ini
 * updated requirements for new tox.ini

Change-Id: I74c9b7f7bd137b6284e4e3dd5c131f348b564d78
Partial-Bug: #1404892

run_tests.sh

@@ -66,7 +66,7 @@ function run_tests {
 
 function run_pep8 {
   echo "Running pep8 ..."
-  tox -eflake8 -v
+  tox -epep8 -v
 }
 
 

test-requirements.txt

@@ -1,7 +1,7 @@
 -r requirements.txt
 mock==1.0.1
-pep8==1.4.6
-tox==1.5.0
+flake8
+tox>=1.7.1
 coverage==3.6
 fabric
-bottle
+bottle

tox.ini

@@ -5,17 +5,27 @@
 
 [tox]
 minversion = 1.6
-envlist = flake8
+envlist = pep8
 skipsdist = True
 
-[flake8]
-show-source = True
-exclude = .tox
-
 [testenv]
-commands = nosetests fuel_plugin/testing/tests/unit fuel_plugin/testing/tests/functional/tests.py:AdapterTests
+usedevelop = True
+setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
+commands =
+    nosetests {posargs:fuel_plugin/testing/tests}
 
-[testenv:flake8]
-deps = flake8
-commands = flake8
+[testenv:venv]
+deps = -r{toxinidir}/requirements.txt
+commands = {posargs:}
+
+[testenv:pep8]
+usedevelop = False
+commands =
+    flake8 {posargs}
+
+[flake8]
+exclude = .venv,.git,.tox,dist,doc,*lib/python*,*egg,build,tools,__init__.py,docs
+show-pep8 = True
+show-source = True
+count = True