error_log

  6) UsersController#create sends a notification email to coach of team selected
     Failure/Error: @team = create(:team, coach: @ref)

     ActiveModel::MissingAttributeError:
       can't write unknown attribute `coach_id`
     # ./spec/controllers/users_controller_spec.rb:6:in `block (2 levels) in <top (required)>'
     # -e:1:in `<main>'


  6) UsersController#create sends a notification email to coach of team selected
     Failure/Error: @team = create(:team, coach_id: @ref)

     NoMethodError:
       undefined method `coach_id=' for #<Team:0x007f812c5f4768>
       Did you mean?  coach=

  6) UsersController#create sends a notification email to coach of team selected
     Failure/Error: @team = create(:team, coach: @ref.id)

     ActiveRecord::AssociationTypeMismatch:
       User(#70096381692760) expected, got Integer(#70096370672360)

team.rb

# == Schema Information
#
# Table name: teams
#
#  id             :integer          not null, primary key
#  name           :string
#  created_at     :datetime         not null
#  updated_at     :datetime         not null
#  coach_id       :integer
#  team_leader_id :integer
#


class Team < ActiveRecord::Base
  has_many :users
  has_many :business_industries, through: :users
  belongs_to :coach, class_name: 'User'
  belongs_to :team_leader, class_name: 'User'

  def unassigned_business_industries
     list = BusinessIndustry.all - business_industries
     list.sort_by! { |industry| industry.name.capitalize }
  end

  def assigned_business_industries
    BusinessIndustry.where.not(id: business_industries.pluck(:id))
  end
end


# == Schema Information
#
# Table name: teams
#
#  id             :integer          not null, primary key
#  name           :string
#  created_at     :datetime         not null
#  updated_at     :datetime         not null
#  coach_id       :integer
#  team_leader_id :integer
#

FactoryGirl.define do
  factory :team do
    name { Faker::Address.unique.street_name }
  end
end

user.rb

# == Schema Information
#
# Table name: users
#
#  id                   :integer          not null, primary key
#  email                :string
#  password_digest      :string
#  role                 :string           default("visitor")
#  team_id              :integer
#  business_industry_id :integer
#  job_id               :integer
#  first_name           :string
#  last_name            :string
#  phone_number         :string
#  birthday             :date
#  account_id           :integer
#  subscription_id      :integer
#  referral_code        :string
#  referrer             :string           default("none")
#  points               :integer          default(0)
#

class User < ActiveRecord::Base
  before_create :set_referral_code
  belongs_to :team
  belongs_to :business_industry
  belongs_to :job
  belongs_to :account
  belongs_to :subscription
  has_one :business_category, through: :business_industry
  accepts_nested_attributes_for :job
  has_many :member_questionnaires
  has_many :questionnaires, through: :member_questionnaires

  validates_presence_of :first_name
  validates_presence_of :last_name
  validates_presence_of :email
  validates_presence_of :role
  validates_presence_of :referrer

  has_secure_password

users_controler_spec.rb

RSpec.describe UsersController do
  before(:all) do
    @ref = create(:user, role: 'admin')
    @team = create(:team, coach: @ref)
  end
  describe '#create' do
    it 'sets a referral code' do
      post :create, params: new_user_params
      expect(User.first.referral_code).to be_present
    end

    it 'sets referrer code' do
      post :create, params: new_user_params
      expect(User.last.referrer).to eq(@ref.referral_code)

    end

    it 'adds a point to the referrer' do
      post :create, params: new_user_params
      @ref.reload
      expect(@ref.points).to eq 1
    end

    it 'sends a notification email' do
      binding.pry
      expect { post :create, new_user_params }.to change { ActionMailer::Base.deliveries.count }.by(1)
    end

    skip 'sends a notification email to admin' do
      expect { post :create, new_user_params }.to change { ActionMailer::Base.deliveries.count }.by(1)
    end

    skip 'sends a notification email to coach of team selected' do
      expect { post :create, new_user_params }.to change { ActionMailer::Base.deliveries.count }.by(1)
    end
  end

  def new_user_params
    { user: FactoryGirl.attributes_for(:user, referrer: @ref.referral_code) }
  end
end