Test with multiple versions of tornado. See #798

.travis.yml

@@ -5,6 +5,8 @@ python:
 
 env:
   - TOX_ENV=py27
+  - TOX_ENV=tornado2.3
+  - TOX_ENV=tornado3.2
   - TOX_ENV=docs
   - TOX_ENV=flake8
 

tox.ini

@@ -1,13 +1,23 @@
 [tox]
-envlist = py27, docs, flake8
+envlist = tornado2.3, tornado3.2, py27, docs, flake8
 
 [testenv]
 sitepackages = true
+commands = nosetests -v --with-xunit --xunit-file=xunit-{envname}.xml --with-coverage --cover-package=mopidy
 deps =
     coverage
     mock
     nose
-commands = nosetests -v --with-xunit --xunit-file=xunit-{envname}.xml --with-coverage --cover-package=mopidy
+
+[testenv:tornado2.3]
+commands = nosetests -v tests/http
+deps = {[testenv]deps}
+    tornado==2.3
+
+[testenv:tornado3.2]
+commands = nosetests -v tests/http
+deps = {[testenv]deps}
+    tornado==3.1
 
 [testenv:docs]
 deps = -r{toxinidir}/docs/requirements.txt