Guard support for jasmine-headless-webkit

Add running your Jasmine specs to your Guardfile via jasmine-headless-webkit. Nice!

guard 'jasmine-headless-webkit' do
  watch(%r{^app/assets/javascripts/(.*)\..*}) { |m| newest_js_file("spec/javascripts/#{m[1]}_spec") }
end

gem install guard-jasmine-headless-webkit and then guard init jasmine-headless-webkit in your project directory to get started. You should also put it in your Gemfile because, hey, why not, right?

guard options

• :all_on_start => false to not run everything when starting, just like guard-rspec

What's the deal with newest_js_file?

Since one could, theoretically, have a CoffeeScript app file and a JavaScript spec file (or vice versa), the search for the correct matching file is a little more complicated. newest_js_file extends the Guard DSL to search the given path for the newest .js or .coffee file:

newest_js_file('spec/javascripts/models/my_model')
  #=> search for Dir['spec/javascripts/models/my_model*.{js,coffee}'] and return the newest file found

If you 100% know you won't need that support, modify your Guardfile as appropriate.

...and the .jst file search?

I use Backbone.js a lot, and I put my Underscore view templates in app/views/*.jst and mash them all together with Jammit for use in my apps. Feel free to change that, it's your Guardfile after all. Or, try it. It's easy to do in your assets.yml file:

templates:
- app/views/*.jst