The QUnit rake task starts a server in test mode. We need a tweak to allow dynamic CSP hostnames in test mode. This tweak is already present in development mode.
To allow CSP to work, the browser host/port must match what the server sees. Therefore we need to disable the enforce_hostname middleware in test mode. To keep rspec and production as similar as possible, we skip enforce_hostname using an environment variable.
Also move the qunit rake task to use unicorn, for consistency with development and production.
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
* Allow running specific plugin tests using ENV variables
* Add a `rake plugin:qunit` task to match the existing `rake plugin:spec` task
* Improve docker.rake to allow running specific plugin qunit tests
* Purge cache before and after qunit tests
* Stop module auto-loader trying to auto-load tests
* Use URL query parameters to pass config into Qunit, avoiding caching issues
* Oops, searchParams doesn’t work in phantomJS. Parse the URL manually.
* Escape ampersands before passing URL to phantomJS, otherwise multiple parameters go wrong
this removes the space between the query string and the URL
```
$MODULE='Acceptance: Search' rake qunit:test\[20000\]
....
Running: {"module":"Acceptance: Search"}
... http://localhost:60099/qunit?module=Acceptance%3A%20Search 20000
```
The timeout value seems to work fine.