Rails%203%20In%20Action

Setting up a testing environment
This will now point to the correct location for your dummy application’s Rakefile. If
you had defined a custom task within this dummy application called email_everyone,
it would be available in your engine as app:email_everyone. This is designed to stop
the conflicts between the application and the engine.
Also in Rakefile, you need to replace the use of Rake::TestTask with the equivalent
for RSpec. Let’s remove these lines from Rakefile now:
require 'rake/testtask'
Rake::TestTask.new(:test) do |t|
t.libs :spec
On the final line here you tell Rake to default to the spec task if there is no task specified.
This means that, rather than running rake spec to run the tests, you can run rake.
The second and final location you need to change the test/dummy reference is in
script/rails at the root of your engine. This contains this line:
load File.expand_path('../../test/dummy/script/rails', __FILE__)
This file would normally load the test/dummy/script/rails file directory, if you hadn’t
already moved it. This file is responsible for loading the subcommands for the rails
command. You need to change this line to make it work again:
load File.expand_path('../../spec/dummy/script/rails', __FILE__)
With these changes complete, your move away from Test::Unit is also complete. Your
next step is going to be installing the RSpec and Capybara gems and setting them up.
With those done, then you can get down to writing some tests.
17.4.2 Installing RSpec and Capybara
To install these gems, you’re not going to add them to your Gemfile, but instead to
forem.gemspec. The established best practice for developing gems is to put the dependencies
inside the gemspec. That way, when people install this engine as a gem using
gem install forem, they’ll get all the normal dependencies installed, and if they install
it using gem install forem --dev, they’ll get all the development dependencies as well.
Directly before the end of the Gem::Specification.new block, you’ll put these two
lines to declare that RSpec and Capybara are development dependencies of your
application:
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