Poltergeist - A PhantomJS driver for Capybara
poltergeist to your Gemfile, and add in your test setup add:
You will also need PhantomJS 1.3+ on your system. Here's how to do that.
Currently PhantomJS is not 'truly headless', so to run it on a continuous integration
server you will need to use Xvfb. You can either use the
headless gem for this,
or make sure that Xvfb is running and the
DISPLAY environment variable is set.
Additionally, you can grab screenshots of the page at any point by calling
page.driver.render('/path/to/file.png') (this works the same way as the PhantomJS
render feature, so you can specify other extensions like
You can customize the way that Capybara sets up Poltegeist via the following code in your test setup:
Capybara.register_driver :poltergeist do |app| Capybara::Poltergeist::Driver.new(app, options) end
options is a hash of options. The following options are supported:
:phantomjs(String) - A custom path to the phantomjs executable
:debug(Boolean) - When true, debug output is logged to
:logger(Object responding to
puts) - When present, debug output is written to this object
Please file bug reports on Github and include example code to reproduce the problem wherever possible. (Tests are even better.)
If capybara-webkit works for you, then by all means carry on using it.
However, I have had some trouble with it, and Poltergeist basically started as an experiment to see whether a PhantomJS driver was possible. (It turned out it was, but only thanks to some new features in the recent 1.3.0 release.)
In the long term, I think having a PhantomJS driver makes sense, because that allows PhantomJS to concentrate on being an awesome headless browser, while the capybara driver (Poltergeist) is able to be the minimal amount of glue code necessary to drive the browser.
Copyright (c) 2011 Jonathan Leighton
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