olefriis/test-automation-talk

What?

Example code from my "Test Automation" talk. There's some Ruby unit test using RSpec, some Cucumber unit testing, and WebDriver test.

Before running the presentation

• Reset this repository.
• Start Sinatra server from browser example.

Ruby example

Run tests: bundle exec rspec. If you want some nice formatting: bundle exec rspec -f d.

Potential code:

class Order
  def initialize
    @sum = 0
  end

  def sum
    @sum
  end

  def add_line(description, amount)
    @sum += amount
  end
end

Potential test:

require 'order'

RSpec.describe Order do
  subject { Order.new }

  context 'newly created' do
    it 'is free' do
      expect(subject.sum).to eq(0)
    end
  end

  context 'with lines' do
    before do
      subject.add_line('Carpets', 42)
      subject.add_line('Cleaners', 15)
    end

    it 'knows the sum' do
      expect(subject.sum).to eq(57)
    end
  end
end

Run continuously in RubyMine by right-clicking the specs folder, selecting Run -> All specs, then selecting the "Toggle auto-test" button just beneath the "play" button to the left.

JavaScript example

Just load the index.html file, reload to re-test. Try breaking the test.

Cucumber example

Look at the project structure. I already created the Order class, so we'll be focusing entirely on the Cucumber part of it.

Run the tests (bundle exec cucumber), watch the really nice and helpful error message appear.

Potential steps:

Given('I have an order') do
  @order = Order.new
end

Then('I need to pay {int} dollars') do |int|
  if @order.sum != int
    raise "Expected to pay #{int} dollars, was #{@order.sum}"
  end
end

Given('I add for {int} dollars {string}') do |amount, name|
  @order.add_line(name, amount)
end

CLI example

Run tests: bundle exec rspec

These tests are using JetBlack, which has great documentation on GitHub.

Potential test:

  context "when starting up for the first time" do
    it "has no items" do
      result = session.run("#{command} list")
      expect(result.stdout).to be_empty
    end

    it "can add an item by specifying it on the command-line" do
      session.run("#{command} add Buy milk")

      result = session.run("#{command} list")
      expect(result.stdout).to include("1. Buy milk")
    end

    it "can add an item by specifying it interactively" do
      session.run_interactive("#{command} add") do |terminal|
        terminal.expect("Which item would you like to add?", reply: "Buy milk")
      end

      result = session.run("#{command} list")
      expect(result.stdout).to include("1. Buy milk")
    end
  end

  context "with a couple of items" do
    before do
      session.run("#{command} add Buy milk")
      session.run("#{command} add Slice bread")
    end

    it "can complete an item by specifying the number on the command-line" do
      session.run("#{command} complete 1")

      result = session.run("#{command} list")
      expect(result.stdout).to include("1. Slice bread")
      expect(result.stdout).not_to include("Buy milk")
    end

    it "can complete an item by specifying the number interactively" do
      session.run_interactive("#{command} complete") do |terminal|
        terminal.expect("Which item would you like to complete?", reply: "1")
      end

      result = session.run("#{command} list")
      expect(result.stdout).to include("1. Slice bread")
      expect(result.stdout).not_to include("Buy milk")
    end
  end

Browser example

Make sure you have Firefox installed.

Start server: bundle exec ruby server.rb

Run tests: bundle exec rspec

Potential test:

  it 'can add new tasks' do
    fill_in 'name', with: 'Sleep'
    click_button 'Add'

    fill_in 'name', with: 'Wake up'
    click_button 'Add'

    expect(body).to include('Sleep')
    expect(body).to include('Wake up')
  end

In spec_helper.rb, try setting Capybara.default_driver to :selenium_headless.