Use setup.py requirements, cleanup

tox.ini

@@ -12,8 +12,7 @@ commands=
 
 [testenv:lint]
 skip_install = True
-deps =
-    flake8
+deps = .[dev]
 commands =
     flake8 --max-line-length 79 --ignore=E402,E123 dhcpcanon scripts tests
 
@@ -22,44 +21,24 @@ skip_install = True
 changedir={toxinidir}
 deps =
    coverage
-   # codecov
 commands=
    coverage combine
    coverage report
    coverage html
-   # only to run from travis
-   # codecov
-   # coveralls
 
 [testenv]
-whitelist_externals = sh
 passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
-deps =
-    coverage
-    pytest
-    pytest-catchlog
+deps = .[test]
 commands =
-   sh -c "which python"
-   sh -c "which coverage"
-   python -V
-   pip --version
-   python -c "import setuptools; print('setuptools-%s' % setuptools.__version__)"
-   coverage --version
-   # test alias not enabled in setup.py
-   # coverage run --rcfile={toxinidir}/.coveragerc --source=dhcpcanon setup.py test
-   # with this test does not wait to get offer
-   coverage run --rcfile={toxinidir}/.coveragerc --source=dhcpcanon -m pytest -vs {toxinidir}/tests
+   coverage run --rcfile={toxinidir}/.coveragerc --source=dhcpcanon -m pytest -svx {toxinidir}/tests
 
 [testenv:doc]
-deps =
-    sphinx
-    sphinx-bootstrap-theme
+deps = .[doc]
 whitelist_externals = make
 changedir = docs
 commands =
     make html
+    # this requires build the pdf images
     # make latexpdf
+    # this requires network
     # make linkcheck
-
-[pytest]
-addopts = -rsxX