The Holy Grail of testing for front-end development; execute browser-less, console-based, javascript + DOM code right from within your Rails test suite.
HolyGrail is a Harmony plugin for Ruby on Rails.
Use the js method in your functional tests to execute javascript within the
context of a view (the last response body). js returns the value of the last
javascript statement, cast to an equivalent ruby object.
class PeopleControllerTest < ActionController::TestCase
test "executes simple js" do
assert_equal 2, js('1+1')
end
test "accesses the DOM" do
get :foo
assert_equal 'Foo', js("document.title")
assert_equal 2, js("document.getElementsByTagName('div').length")
end
end
Install the gem
# There's a gem dependency bug in rubygems currently, so we'll have to
# install some dependencies manually. This will be fixed soon.
gem install stackdeck
gem install johnson -v "2.0.0.pre3" #exact version matters
gem install holygrail
and add it to your environment
config.gem "holygrail"
HolyGrail is based on Harmony, which in turn is a thin DSL wrapper around three amazing libs, Johnson, env.js and Envjs . The authors of those libs have been doing a huge amount of great work for quite a while, so please go recommend them on WorkingWithRails right now and/or follow them on github:
jbarnette, tenderlove, smparkes, wycats, matthewd, thatcher, jeresig
Special thanks go to smparkes for his patient help, and for providing the last puzzle pieces that made everything work together.
- Support integration tests
- Support Rails3