undefined method `header` in RSpec - ruby-on-rails

Question

To learn API by using Rails I'm reading this tutorial.
In a part of RSpec test there is a method like this:
spec/support/authentication_helper.rb
module AuthenticationHelper
def sign_in(user)
header('Authorization', "Token token=\"#{user.authentication_token}\", email=\"#{user.email}\"")
end
def create_and_sign_in_user
user = FactoryGirl.create(:user)
sign_in(user)
user
end
alias_method :create_and_sign_in_another_user, :create_and_sign_in_user
end
RSpec.configure do |config|
config.include AuthenticationHelper, type: :api
end
And the test failed by undefined method `header'.
Where is this header method defined?
This is the whole source code of this tutorial.
https://github.com/vasilakisfil/rails_tutorial_api/
spec/apis/users_spec.rb
require 'rails_helper'
describe Api::V1::UsersController, type: :api do
context :show do
before do
create_and_sign_in_user
#user = FactoryGirl.create(:user)
get api_v1_user_path(#user.id), format: :json
end
it 'returns the correct status' do
expect(last_response.status).to eql(200)
end
it 'returns the data in the body' do
body = HashWithIndifferentAccess.new(MultiJson.load(last_response.body))
expect(body[:user][:name]).to eql(#user.name)
expect(body[:user][:updated_at]).to eql(#user.updated_at.iso8601)
end
end
end
StackTrace
1) Api::V1::UsersController show returns the correct status
Failure/Error: create_and_sign_in_user
NameError:
undefined local variable or method `request' for #<RSpec::ExampleGroups::ApiV1UsersController::Show:0x007fcbfec91d60>
# ./spec/support/authentication_helper.rb:4:in `sign_in'
# ./spec/support/authentication_helper.rb:9:in `create_and_sign_in_user'
# ./spec/apis/user_spec.rb:6:in `block (3 levels) in <top (required)>'
# ./spec/rails_helper.rb:39:in `block (3 levels) in <top (required)>'
# ./spec/rails_helper.rb:38:in `block (2 levels) in <top (required)>'
# -e:1:in `<main>'
2) Api::V1::UsersController show returns the data in the body
Failure/Error: create_and_sign_in_user
NameError:
undefined local variable or method `request' for #<RSpec::ExampleGroups::ApiV1UsersController::Show:0x007fcbfb7cfa28>
# ./spec/support/authentication_helper.rb:4:in `sign_in'
# ./spec/support/authentication_helper.rb:9:in `create_and_sign_in_user'
# ./spec/apis/user_spec.rb:6:in `block (3 levels) in <top (required)>'
# ./spec/rails_helper.rb:39:in `block (3 levels) in <top (required)>'
# ./spec/rails_helper.rb:38:in `block (2 levels) in <top (required)>'
# -e:1:in `<main>'

Answer 1

I had to add api_helper.rb to use the methods.
module ApiHelper
include Rack::Test::Methods
def app
Rails.application
end
end
RSpec.configure do |config|
config.include ApiHelper, type: :api #apply to all spec for apis folder
config.include Rails.application.routes.url_helpers, type: :api
end
Here is source code in Github.
https://github.com/vasilakisfil/rails_tutorial_api/blob/008af67e88897a5bcde714ce13d39a26ec70fba7/spec/support/api_helper.rb

Answer 2

In spec/support/auth_helpers.rb, you can try something like this
module AuthHelpers
def authenticate_with_user(user)
request.headers['Authorization'] = "Token token=#{user.token}, email=#{user.email}"
end
def clear_authentication_token
request.headers['Authorization'] = nil
end
end
In Rspec's spec/rails_helper.rb
Rspec.configure do |config|
config.include AuthHelpers, file_path: /spec\/apis/
end
An example test in spec/apis/users_controller_spec.rb:
require 'rails_helper'
describe Api::V1::UsersController, type: :controller do
let(:user) { create(:user) }
context 'signed in' do
before do
authenticate_with_user user
end
it 'does something' # tests here
end
end
Hope it helps!
Edit: Note the type: :controller is important