benchmark

# Before: Subscribing and unsubscribing to `/render_template.action_view/` every test.

Calculating -------------------------------------
    Integration Test        67 i/100ms
     Functional Test        91 i/100ms
-------------------------------------------------
    Integration Test      691.5 (±6.9%) i/s -       3484 in   5.063611s
     Functional Test      938.4 (±5.4%) i/s -       4732 in   5.058631s

# After: Subscribing to `/render_template.actione_view/` only once.

Calculating -------------------------------------
    Integration Test        72 i/100ms
     Functional Test        97 i/100ms
-------------------------------------------------
    Integration Test      735.3 (±6.9%) i/s -       3672 in   5.019675s
     Functional Test      963.9 (±5.6%) i/s -       4850 in   5.048307s

user_flow_test.rb

require 'test_helper'
require 'benchmark/ips'
 
class UserFlowTest < ActionDispatch::IntegrationTest
  def test_index
    get "http://www.example.com/users"
    assert_equal 200, response.status
  end
end
 
class UserFlowTest2 < ActionController::TestCase
  tests UsersController
 
  def test_index
    get :index
    assert_equal 200, response.status
  end
end
 
Benchmark.ips(5) do |bm|
  bm.report 'Integration Test' do
    Minitest.run_one_method(UserFlowTest, 'test_index')
  end
 
  bm.report 'Functional Test' do
    Minitest.run_one_method(UserFlowTest2, 'test_index')
  end
end

users_controller.rb

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]
 
  # GET /users
  # GET /users.json
  def index
    render plain: 'ok'
  end
end