Testing current user in helper spec - ruby-on-rails

Question

I have this pretty basic helper which relies on current_user variable provided by Sorcery in controllers and helpers
def current_user_link
user_link current_user
end
def user_link(user, html_options = {}, &block)
link_to user.to_s, user, html_options, &block
end
How can I test this helper?
describe UsersHelper do
describe '#current_user_link' do
it 'should return a link to the current user' do
expected_link = link_to current_user.name, current_user
???
expect(current_user_link).to eq expected_link
end
end
Do I need to stub current_user somehow?
Is it even worth testing?

Answer 1

This is how I solved it.
describe '#current_user_link' do
it 'returns a link to the current user ' do
user = build(:user)
expected_link = link_to user.name, user
allow(controller).to receive(:current_user).and_return(user)
expect(helper.current_user_link).to eq(expected_link)
end
end
PSA: dont forget to call your method on helper.

Answer 2

I was trying to use current_user with Sorcery in an Rspec ApplicationHelper spec and none of the above answers worked for me.
What worked for me was first defining a user with FactoryGirl:
let(:user) { create(:user) }
Then, write an example like this:
it "does stuff" do
allow(helper).to receive(:current_user).and_return(user)
expect(helper.some_method_using_current_user).to do_something
end
Key difference is using the helper object in the example.

Answer 3

simpliest work around is to declare in spec:
let(:current_user) { create(:user) }

Answer 4

you can stub your current_user
describe UsersHelper do
describe '#current_user_link' do
let(:user) { FactoryGirl.build(:user) }
let(:expected_link) { link_to user.name, user }
before { allow_any_instance_of(ApplicationController).to receive(:current_user).and_return(user) }
it { expect(current_user_link).to eq(expected_link) }
end
end
or set your user to session
than you should
let(:user) { FactoryGirl.create(:user) }
and
before { allow_any_instance_of(ActionDispatch::Request).to receive(:session).and_return(user_id: user.id) }

Answer 5

This worked for me:
describe UsersHelper do
describe '#current_user_link' do
it 'should return a link to the current user' do
user = FactoryGirl.create(:user)
allow_any_instance_of(UsersHelper).to receive(:current_user).and_return(user)
expected_link = link_to user.name, user
expect(current_user_link).to eq(expected_link)
end
end
end
In the rails_helper.rb you need to have:
RSpec.configure do |config|
config.include Devise::Test::ControllerHelpers, type: :helper
end

Answer 6

When testing helper modules with RSpec, you need to stub the method in your Rspec::ExampleGroups target...
allow_any_instance_of(RSpec::ExampleGroups::UsersHelper).to receive(:current_user).and_return user

Answer 7

For those who came from Devise:
You can simply define the method inside the spec.
describe 'option_for_product_weight' do
before {
def helper.current_user
User.first
end
}
subject { helper.option_for_product_weight }
it 'returns the list' do
expect(subject).not_to be_empty
end
end