Below are steps to follow

1. Adding rspec into the app gemfile:
   -> gem 'rspec-rails', '~> 6.1.0' into dev/test group
   -> install the gem by running: bundle install
   -> run: rspec to verify
2. Init rspec in the application
   -> run this command: rails g rspec:install
   
   
3. Now create a folder /spec/requests
4. Create a file called money_records_spec.rb with following
   
   
5. Run the tests by command: rspec
6. Adding FactoryBot to gemfile
   -> gem 'factory_bot_rails' into dev/test group
   -> bundle install
   
7. Now creating a folder /spec/factories, then a file money_records.rb
   
   
8. Continuing to edit the test file as below
   
   

   require 'rails_helper'
   RSpec.describe 'Money Records API', type: :request do
   	describe 'GET /money_records' do
   		it 'returns a list of money records' do
   			FactoryBot.create(:money_record, event_type: 'income', value: 100, event_date: Time.now, note: 'record 1')
   			FactoryBot.create(:money_record, event_type: 'income', value: 200, event_date: Time.now, note: 'record 2')
   			get '/money_records'
   			expect(response).to have_http_status(:success)
   			expect(JSON.parse(response.body).size).to eq(2)
   		end
   	end
   end

9. Run rspec and verify