users_controller_spec.rb

RSpec.describe UsersController do
  before(:each) do
    sponsor = create(:user, role: 'sponsor')
    @team_leader = create(:user, role: 'team leader')
    @ref = create(:user, role: 'admin')
    @team = create(:team, coach_id: @ref.id, leader_id: @team_leader.id, sponsor: sponsor )
  end
  
  describe '#create' do
    
    it 'sends a notification email to admin, coach, team leader' do
      expect { post :create, new_user_params }.to change { ActionMailer::Base.deliveries.count }.by(3)
    end
  end

  def new_user_params
    { user: FactoryGirl.attributes_for(:user, referrer: @ref.referral_code, team_id: @team.id) }
  end
  
  
  2) UsersController#create sends a notification email to admin, coach, team leader
     Failure/Error: expect { post :create, new_user_params }.to change { ActionMailer::Base.deliveries.count }.by(3)
     
     ArgumentError:
       unknown keyword: user
     # ./spec/controllers/users_controller_spec.rb:34:in `block (4 levels) in <top (required)>'
     # ./spec/controllers/users_controller_spec.rb:34:in `block (3 levels) in <top (required)>'
     # -e:1:in `<main>'