Integration example that allows multiple sessions at same time

integration_example.rb

require "test_helper"

class CompaniesTest < ActionDispatch::IntegrationTest
  it "admin can signin and visit companies" do
    admin = new_session_as :admin
    admin.goes_to "/companies"
  end

  private

  module CompaniesTestDSL
    def goes_to(path)
      get path
      assert_response :success
    end

    def goes_to_signin
      get "/signin"
      assert_response :success
    end

    def signin_as(person)
      @current_user = users(person)
      post "/sessions", email: @current_user.email, password: "password"
      assert_response :redirect
      follow_redirect!
      assert_template "welcome/index"
    end
  end

  def new_session
    open_session do |session|
      session.extend(CompaniesTestDSL)
      yield session if block_given?
    end
  end

  def new_session_as(person)
    new_session do |session|
      session.goes_to_signin
      session.signin_as person
      yield session if block_given?
    end
  end
end