Account Registration

account_registration.rb

class AccountRegistration
  include ActiveModel::Model

  attr_accessor :email

  validates :email, presence: true, format: { with: /.+@.+\..+/i }
end

account_registration_spec.rb

require "rails_helper"

describe AccountRegistration do
  context "validations" do
    describe "#email" do
      context "when the email is an invalid format" do
        it "adds an error message" do
          account_registration = AccountRegistration.new(email: "foo")

          expect(account_registration).not_to be_valid
          expect(account_registration.errors[:email]).
            to include("is invalid")
        end
      end
    end
  end
end

accounts_controller.rb

class API::AccountsController < ActionController::Base
  SALESFORCE_EMAIL_SUBMITTED_STATE = "Email_Submitted".freeze

  def create
    account_registration = AccountRegistration.new(email: email)

    if account_registration.valid?
      if account.paid_and_has_not_logged_in?
        send_onboard_instruction_email
        render status: 202, json: {}
      elsif account.paid_and_has_logged_in?
        render status: 202, json: { login_url: new_session_url }
      else
        send_account_to_salesforce_through_segment
        render status: 200, json: { account_id: account.id }
      end
    else
      render status: 400, json: { errors: account_registration.errors.full_messages }
    end
  end
end