Fix indexing pure-Python proxies on Py3, and restore __getslice__ on Py2issue21

Fixes #21.

This removes the special cases for lists and tuples in the C code (but
requires an #if Python 2 block). Tests are added (and generalized for
Python 3). I verified that this fixes the issues observed in the
zope.security tests.

1 files changed, 5 insertions, 7 deletions

diff --git a/tox.ini b/tox.ini
index fda63e1..c4f3928 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,17 +10,15 @@ commands =
     sphinx-build -b doctest -d {envdir}/doctrees docs {envdir}/doctest
 
 [testenv:coverage]
+usedevelop = true
 basepython =
     python2.7
 commands =
-#   The installed version messes up nose's test discovery / coverage reporting
-#   So, we uninstall that from the environment, and then install the editable
-#   version, before running nosetests.
-    pip uninstall -y zope.proxy
-    pip install -e .
-    coverage run -m zope.testrunner --test-path=src
+    coverage run -m zope.testrunner --test-path=src []
+    coverage run -a -m sphinx -b doctest -d {envdir}/.cache/doctrees docs {envdir}/.cache/doctest
+    coverage report --fail-under=100
 deps =
-    .[test]
+    {[testenv]deps}
     coverage
 
 [testenv:docs]