discourse/app/controllers
Guo Xiang Tan 6c0a29698b Fix JS tests failing when running in RAILS_ENV=test.
Fixes the following error:

```
phantomjs /home/tgxworld/work/discourse/vendor/assets/javascripts/run-qunit.js http://localhost:60099/qunit
2017-07-25 16:27:41 +0900: Rack app error handling request { GET /stylesheets/desktop.css }
<Errno::ENOENT: No such file or directory @ rb_sysopen - /home/tgxworld/work/discourse/tmp/stylesheet-cache/desktop.css>
/home/tgxworld/work/discourse/app/controllers/stylesheets_controller.rb:65:in `write'
/home/tgxworld/work/discourse/app/controllers/stylesheets_controller.rb:65:in `show_resource'
/home/tgxworld/work/discourse/app/controllers/stylesheets_controller.rb:9:in `show'
```
2017-07-25 16:31:31 +09:00
..