Multi-browser interaction e.g. messaging apps
Run tests on remote machines, phones, iPads etc.
Terminus is a Capybara driver. For the most part, you will not use it directly: you will use the Capybara API and it will send instructions to Terminus for execution. To set Terminus as your driver:
require 'capybara' require 'terminus' Capybara.current_driver = :terminus
Terminus does require some extra setup before you can use it to control your app. First up, you need to start the Terminus server on the machine where your application will be running:
This starts the server on port 7004. Now open a browser at 127.0.0.1:7004/. (I recommend using the IP address of the Terminus host; Chrome has bugs that can stop WebSockets working if you use the hostname.) This is the 'holding page'. A browser is said to be 'docked' while it is visiting this page, meaning it is ready and waiting to run some tests for you.
To let Terminus control your app's pages, you need to include this just
before the closing
body tag when in testing mode:
<!-- For example if you're using Rails --> <% if Rails.env.test? %> <%= Terminus.driver_script '127.0.0.1' %> <% end %>
If the browser you're using is on a different machine to the Terminus
127.0.0.1 with the Terminus machine's IP
as seen by the browser. For example if I'm running the browser in
VirtualBox and the Terminus server on the host OS, then I set the IP to
10.0.2.2. You could also use
request.host to get
the right IP automatically if you're running your app and your Terminus
server on the same machine.
Finally, in your tests you need to make sure there's a docked browser and select it. In a 'before' block, run the following:
.ensure_docked_browser .browser = :docked
After each test is finished, you need to return the browser to the holding page to make it ready to accept new work. In an 'after' block:
This returns all currently connected browsers to the holding page.
Notes / to-do
Support IE, which has no built-in XPath engine for querying the DOM. I'm working on Pathology (see github.com/jcoglan/pathology) to try and fix this but it's currently not fast enough.
Terminus.browser=to select browsers by name and version so we can control multiple browsers at once.
It can be a little brittle, and occasionally there seem to be race conditions when running the Capybara specs.
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Copyright © 2010 James Coglan
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