RSpec undefined method `each' in call - ruby-on-rails

Question

In my Grape API I've got an endpoint which is responsible of receiving data from CMS webhook - it works well but below specs are failed:
describe ::Webhooks::Cms::ReceiveWebhook, type: :request do
subject(:call) { post endpoint, params: params, headers: basic_authorized_headers(auth_params) }
let(:endpoint) { 'webhooks/Cms' }
let(:params) { { some: 'params' } }
let(:auth_params) do
{
username: Rails.application.credentials.cms_user,
password: Rails.application.credentials.cms_password,
}
end
it 'returns a successful response' do
call
expect(response).to be_successful
end
end
helper with basic_authorized_headers method from headers:
module AuthRequestHelpers
def basic_authorized_headers(username: nil, password: nil)
"#{username}:#{password}"
end
end
I'm getting error:
Failure/Error: subject(:call) { post endpoint, params: params, headers: basic_authorized_headers(auth_params) }
NoMethodError:
undefined method `each' for "test#test.com:password":String
Here is my controller:
module Cms
class ReceiveWebhook < Base
desc 'Receive data of CRUD actions from CMS webhook'
http_basic do |user, password|
user == Rails.application.credentials.cms_user &&
password == Rails.application.credentials.cms_password
end
post :cms do
status 200
end
end
end

Answer 1

post expects a hash for the headers param, you're passing a string.
subject(:call) { post endpoint, params: params, headers: { 'Authorization' => basic_authorized_headers(auth_params) } }
Also, usually basic auth requires the "Basic" keyword, and that the credentials be encoded in Base64:
module AuthRequestHelpers
def basic_authorized_headers(username: nil, password: nil)
encoded_credentials = Base64.encode64("#{username}:#{password}")
"Basic #{encoded_credentials}"
end
end