update tox.ini to a more readable and extendable state, add deactivat…

…ed testenvs

tox.ini

@@ -1,7 +1,24 @@
 [tox]
-envlist = py27,py34,py35,py36,pypy,pypy3
+envlist =
+    #flake8,
+    coverage-clean,
+    py27,
+    #py34,
+    #py35,
+    #py36,
+    #pypy,
+    #pypy3,
+    #isort,
+    #coverage-report,
+
+skip_missing_interpreters = False
 
 [testenv]
+usedevelop = True
+extras =
+    develop
+    test
+
 install_command = pip install --no-cache-dir --no-binary=:all: {opts} {packages}
 
 commands =
@@ -11,3 +28,37 @@ deps =
     ./develop/RestrictedPython
 setenv =
     PIP_NO_CACHE = 1
+
+[testenv:coverage-clean]
+deps = coverage
+skip_install = true
+commands = coverage erase
+
+[testenv:coverage-report]
+basepython = python2.7
+deps = coverage
+setenv =
+    COVERAGE_FILE=.coverage
+skip_install = true
+commands =
+    coverage combine
+    coverage html
+    coverage xml
+    coverage report
+
+[testenv:isort]
+basepython = python2.7
+deps = isort
+commands =
+    isort --check-only --recursive {toxinidir}/src {toxinidir}/tests {posargs}
+
+[testenv:isort-apply]
+basepython = python2.7
+deps = isort
+commands =
+    isort --apply --recursive {toxinidir}/src {toxinidir}/tests {posargs}
+
+[testenv:flake8]
+basepython = python2.7
+deps = flake8
+commands = flake8 --doctests src tests setup.py