Isolated Rabl Specs

user.json.rabl_spec.rb

# user.json.rabl_spec.rb
APP_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..', '..', '..', '..'))
$: << File.join(APP_ROOT, 'spec/support') # for my spec helpers
$: << File.join(APP_ROOT, 'config/initializers') # for rabl_init.rb
require 'my_spec_mocks'
require 'rabl'
require 'rabl_init'

# We need to fool rabl into thinking we are running rails.
# All rabl wants is the root path to help in finding templates.
# This is necessary for rabl functions like "extends" and "partial"
# that refer to other templates, but obviously this spec knows nothing
# about where they are, so we tell rabl!
class Rails
  def self.root
    APP_ROOT
  end
end

# managed to shave off about 200ms by not requiring 'active_support/core_ext'
# but I needed this:
module JSON; end

describe 'homefront/users/user.json.rabl' 
  include MySpecMocks # this is just a set of mocks I can use to fake activerecord objects
  before do
    f = File.open File.join(APP_ROOT,'app/views/homefront/users/user.json.rabl')
    @engine = ::Rabl::Engine.new(f.read, { :format => :json })
    @user = make_mock_user
    @rendered = JSON.parse @engine.render(nil, { object: @user })
  end
  context 'renders' do
    it 'first_name' do
      @rendered['first_name'].should eq @user.first_name
    end
    it 'last_name' do
      @rendered['last_name'].should eq @user.last_name
    end
    it 'email' do
      @rendered['email'].should eq @user.email
    end
    it 'relationships_as_dependent' do
      @rendered['relationships_as_dependent'].should be_present
    end
  end
end