Add tox support

.gitignore

@@ -2,3 +2,4 @@
 dist/
 ffmpeg/tests/sample_data/dummy2.mp4
 venv*
+.tox/

.python-version

@@ -0,0 +1,5 @@
+3.3.6
+3.4.6
+3.5.3
+3.6.1
+jython-2.7.0

.travis.yml

@@ -2,8 +2,18 @@ language: python
 before_install:
   - curl -O https://johnvansickle.com/ffmpeg/releases/ffmpeg-3.3.1-64bit-static.tar.xz
   - tar Jxf ffmpeg-3.3.1-64bit-static.tar.xz
+env:
+  - TOX_ENV=py27
+  - TOX_ENV=py33
+  - TOX_ENV=py34
+  - TOX_ENV=py35
+  - TOX_ENV=py36
+  - TOX_ENV=pypy
 install:
-  - pip install -r requirements.txt
+  - pip install tox
 script:
   - export PATH=$(readlink -f ffmpeg-3.3.1-64bit-static):$PATH
-  - py.test
+  - tox -e $TOX_ENV
+cache:
+  directories:
+    - .tox

requirements.txt

@@ -1,2 +1,4 @@
+future
 pytest
 sphinx
+tox

setup.py

@@ -72,7 +72,21 @@ setup(
     author_email='karlk@kralnet.us',
     url='https://github.com/kkroening/ffmpeg-python',
     download_url=download_url,
-    classifiers = [],
     keywords=keywords,
     long_description=long_description,
+    install_requires=['future'],
+    classifiers=[
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: Apache Software License',
+        'Natural Language :: English',
+        'Operating System :: OS Independent',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+    ],
 )

tox.ini

@@ -0,0 +1,13 @@
+# Tox (https://tox.readthedocs.io/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py27, py33, py34, py35, py36, pypy
+
+[testenv]
+commands = py.test
+deps =
+    future
+    pytest