Types of tests

functional_test.rb

require ‘selenium-webdriver’

driver = Selenium::WebDriver.for :firefox
driver.navigate.to "http://string_util_test.com"

input_element = driver.find_element(:name, 'given_string')
input_element.send_keys "Functional Test"

reverse_button = driver.find_element(:id, "reverse")
reverse_button.click
 
assert driver.find_element(:id, "reversed_string").text.eq?("tseT lanoitcnuF")

driver.quit

string_util.rb

class StringUtil < ActiveRecord::Base
	def reverse
		self.reversed_string = self.given_string.reverse
	end
end

string_util_migration.sql

class AddStringUtilModel < ActiveRecord::Migration
  def change
    create_table :string_utils, id: false do |t|
      t.primary_key :given_string, :string
      t.string :reversed_string, null: false
    end
  end
end

string_util_spec.rb

require 'rails_helper'

describe StringUtil do
  it 'should persist reversed string in db' do
    new_string = StringUtil.new(:given_string => "Integration test")
    new_string.reverse
    expect(new_string.reversed_string).to eq("tset noitargetnI")

    new_string.save!

    saved_string = StringUtil.where(:given_string => "Integration test").first
    expect(saved_string.reversed_string).to eq("tset noitargetnI")
  end
end