Add tox to test different python and django versions

.travis.yml

@@ -1,11 +1,40 @@
+sudo: false
 language: python
-python:
-  - "2.7"
-  - "3.4"
-  - "3.5"
-  - "3.6"
-script:
-  - flake8 django_migration_linter
-  - py.test
+
+matrix:
+    include:
+    - python: 2.7
+      env: TOXENV=py27-django19
+    - python: 2.7
+      env: TOXENV=py27-django110
+    - python: 2.7
+      env: TOXENV=py27-django111
+
+    - python: 3.4
+      env: TOXENV=py34-django19
+    - python: 3.4
+      env: TOXENV=py34-django110
+    - python: 3.4
+      env: TOXENV=py34-django111
+    - python: 3.4
+      env: TOXENV=py34-django20
+
+    - python: 3.5
+      env: TOXENV=py35-django19
+    - python: 3.5
+      env: TOXENV=py35-django110
+    - python: 3.5
+      env: TOXENV=py35-django111
+    - python: 3.5
+      env: TOXENV=py35-django20
+
+    - python: 3.6
+      env: TOXENV=py36-django111
+    - python: 3.6
+      env: TOXENV=py36-django20
+
 install:
-  - pip install -e ".[test]"
+  - pip install tox
+
+script:
+    - tox

README.md

@@ -49,7 +49,7 @@ The linter will try to detect if the project is a django project and is versione
 
 ## Tests
 
-The easiest way to run the tests is to invoke [py.test](https://docs.pytest.org/en/latest/).
+The easiest way to run the tests is to invoke [tox](https://pypi.python.org/pypi/tox).
 
 ## License
 

setup.py

@@ -26,8 +26,9 @@ install_requirements = [
 ]
 
 test_requirements = [
+    'tox',
     'pytest',
-    'django',
+    'django>=1.9',
     'django-fake-database-backends',
     'flake8'
 ]
@@ -59,6 +60,10 @@ setup(
         'Intended Audience :: Developers',
         'Environment :: Web Environment',
         'Framework :: Django',
+        'Framework :: Django :: 1.9',
+        'Framework :: Django :: 1.10',
+        'Framework :: Django :: 1.11',
+        'Framework :: Django :: 2.0',
 
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',

tox.ini

@@ -0,0 +1,24 @@
+[tox]
+envlist =
+    py{27,34,35}-django19
+    py{27,34,35}-django110
+    py{27,34,35,36}-django111
+    py{34,35,36}-django20
+    lint
+
+[testenv]
+commands = py.test {posargs}
+extras = test
+pip_pre = true
+deps =
+    django19: django>=1.9,<1.10
+    django110: django>=1.10,<1.11
+    django111: django>=1.11,<2.0
+    django20: django>=2.0
+
+[testenv:lint]
+basepython = python3.6
+deps =
+    flake8
+commands =
+    flake8 django_migration_linter