Test helpers with RSpec in Padrino (Sinatra) - ruby

Question

I'm trying to test a helper in a Padrino (Sinatra) app. My helper method is itself calling Padrino core helper methods but they are undefined. The error appears only in RSpec, while the app works fine. So the way I'm including my helper in RSpec makes it loose "Padrino scope" but I don't know how to bring Padrino helper's scope properly in my RSpec environment.
My helper:
module AdminHelper
Sort = Struct.new(:column, :order)
def sort_link(model, column)
order = sorted_by_this?(column) ? 'desc' : 'asc'
link_to mat(model, column), url(:pages, :index, sort: column, order: order)
end
def sorted_by_this?(column)
column.to_s == #sort.column && #sort.order == 'asc'
end
end
Lenstroy::Admin.helpers AdminHelper
My spec:
describe AdminHelper do
before(:all) do
class AdminHelperClass
include AdminHelper
end
end
subject(:helper) { AdminHelperClass.new }
describe '#sort_link' do
context "with :pages and :title parameters" do
before do
sort = AdminHelperClass::Sort.new('title', 'asc')
helper.instance_variable_set('#sort', sort)
end
subject { helper.sort_link(:pages, :title) }
it { should match(/<a href=([^ ]+)pages/) }
end
end
end
Results in error:
1) AdminHelper#sort_link with :pages and :title parameters
Failure/Error: subject { helper.sort_link(:pages, :title) }
NoMethodError:
undefined method `mat' for #<AdminHelperClass:0x007f1d951dc4a0>
Including a helper where mat is defined doesn't work, as one method is dependent on another helper and it goes on and on...
Update
In my spec helper I have:
def app(app = nil, &blk)
#app ||= block_given? ? app.instance_eval(&blk) : app
#app ||= Lenstroy::Admin
#app.register Padrino::Helpers
#app.register Padrino::Rendering
#app
end
in my spec I have:
it "returns link to resource with sort parameters" do
app do
get '/' do
sort_link(:pages, :title)
end
end
get "/"
last_response.body.should =~ /<a href=([^ >]+)pages/
end
And now tests fail, last_response.body is ''.

Answer 1

Method #mat is defined in Padrino::Admin::Helpers::ViewHelpers. You can do
class AdminHelperClass
include Padrino::Admin::Helpers::ViewHelpers
include AdminHelper
end
Update:
If your methods are really dependent on all these routes and helpers you should consider doing full mockup of your app like this:
def mock_app(base=Padrino::Application, &block)
#app = Sinatra.new(base, &block)
#app.register Padrino::Helpers
#app.register Padrino::Rendering
# register other things
end
def app
Rack::Lint.new(#app)
end
mock_app do
get '/' do
sort_link(my_model, my_column)
end
end
get "/"
assert_equal "some test text", body
Here's how it's done in padrino-admin: https://github.com/padrino/padrino-framework/blob/master/padrino-admin/test/test_admin_application.rb

Answer 2

I was having the same problem (and getting very frustrated tracking down the modules and including them). So far, I've got my specs working by:
1) Explicitly defining my module (as explained in how to use padrino helper methods in rspec)
module MyHelper
...
end
MyApp::App.helpers MyHelper
2) Automatically including helpers at the top of my spec. (Right now I only have one helper spec, but in the future I might try to move this into spec_helper.rb.)
describe MyHelper do
let(:helpers) { Class.new }
before { MyApp::App.included_modules.each { |m| helpers.extend m } }
subject { helpers }
it 'blah' do
expect(subject.helper_method).to eq 'foo'
end
end