Issue 4014 - Publish python-abp on PyPI

tox.ini

Index: tox.ini
===================================================================
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35,py36,pypy,coverage,flake8
+envlist = py27,py35,py36,pypy,coverage2,coverage3,flake8
 
 [flake8]
 ignore = D107, N801, W503
@@ -11,16 +11,27 @@
 commands =
     py.test tests
 
-[testenv:coverage]
+# We have to install our package in development mode so that pytest-cov can
+# find the .coverage and .coveragerc files.
+usedevelop = true
+
+[testenv:coverage2]
+basepython = python2
+setenv = PY_VER = 2
 deps =
     pytest-cov
     mock
 commands =
     py.test --cov=abp --cov-report=term-missing tests
 
-# We have to install our package in development mode
-# so that pytest-cov can find the .coverage file.
-usedevelop = true
+[testenv:coverage3]

[Sebastian Noack, 2018/12/28 00:22:51]

What's the point of using a separate environment for coverage, if you want to
run coverage for both Python 2 and 3 anyway?

[rhowell, 2018/12/28 21:50:08]

By default, tox only checks coverage for the version of Python that is the
current default on the local system. Seems like it would be best to check both
Python 2 & 3. But, I ran into an error trying to change the basepython variable
in one environment:

    py._vendored_packages.iniconfig.ParseError: tox.ini:26: duplicate name
'basepython'

This was a fairly quick & dirty work-around. I did some research, but wasn't
able to find a better way yet, though this article was very informative:
https://anonbadger.wordpress.com/2017/11/24/better-unittest-coverage-stats-ex...

I'm open for discussion or suggestions on this, though.

[Sebastian Noack, 2018/12/28 22:39:02]

If you just run coverage reports for every environment you run tests on, you
don't have to explicitly set the basepython setting. However, the tricky part is
to get the Python major version into the .coveragerc. This should do the trick:

  [testenv]
  deps =
      pytest-cov
      mock
  commands =
      python -c 'import sys; open(".coveragerc",
"w").write("[report]\nexclude_lines = pragma: no py{}
cover".format(sys.version_info[0]))'
      py.test --cov=abp --cov-report=term-missing tests

[rhowell, 2018/12/29 01:30:51]

Done.

+basepython = python3
+setenv = PY_VER = 3
+deps =
+    pytest-cov
+    mock
+commands =
+    py.test --cov=abp --cov-report=term-missing tests
 
 [testenv:flake8]
 basepython = python3