1. Testing

2. Test Driven Development
• Implementation
• Red-Green-Refactor
• Regression Tests

3. Implementation
• Test what should happen
• Test what should not happen

4. Red-Green-Refactor
Add a test
Run all tests
Write some code
Run the tests again
Refactor code

5. Regression Tests
Change environment
Change code
Is everything still working

6. Testing in php
$this->get("http://myserver/login.php");
$this->assertWantedPattern("Please login to continue");
$this->setField("username", "MyTestUser");
$this->setField("password", "t0ps3cr3t");
$this->clickSubmit("Login");
$this->assertWantedPattern("You are logged in");

7. Testing in Java
beginAt("login.jsp");
assertTextInElement("h1", "Please login to continue");
setFormElement("username", "MyTestUser");
setFormElement("password", "t0ps3cr3t");
submit();
assertTextInElement("h1", "You are logged in");

8. Testing in Rails
visit login_path
assert_contain "Please login to continue"
fill_in "username", :with => "MyTestUser"
fill_in "password", :with => "t0ps3cr3t"
click_button "Login"
assert_contain "You are logged in"

9. Test Types
• Unit
• Functional
• Integration

10. Unit
• Most basic level of testing
• Model tests in Rails

11. Unit Testing
class ShipTest
class Ship
def test_crew
attr_accessor :captain
ship = Ship.new
attr_accessor :maties
ship.captain = 1
ship.mateys = 20
def crew
captain + maties
assert_equal 21, ship.crew
end
end
end
end

12. Functional
• Test lifecycle of objects
• Controller tests in Rails

13. Functional Testing
class ShipsController
def enter_other_ship
@ship = Ship.find_captain(params[:captain])
@ship.gold += 1000
@ship.save
redirect_to :action => 'show_loot'
end
end class ShipsControllerTest
def test_entering_other_ship
post 'enter_other_ship', :captain => "Sparrow"
assert_response :redirect
assert_equal "Black Pearl", assign(:ship).name
assert_equal 1000, assigns(:ship).gold
end
end

14. Integration
• Overall application functionalities
• Walk through a series of events
• View Tests / Stories

15. Integration Testing
def test_attacking_other_ships
Given "another ship" do |ship|
@ship_to_enter = Ship.find(ship)
end
Given "my ship" do
Story: Attacking other ships @my_ship = Ship.find_by_captain("Sparrow")
As Captain Sparrow end
I attack another ship
So I can buy more rum Given /my $number_of_mateys maties/ do |number_of_mateys|
@ship_to_enter.attackers = number_of_mateys
Scenario: Attack first ship end
Given another ship When "we attach the other ship" do
And my ship @my_ship.attacks(@ship_to_enter)
And my 20 mateys end
When we attack the other ship
Then 1 pirate dies Then /$pirates_lost pirate dies/ do |pirates_lost|
And we steel 1000 pieces of gold assert_equal @my_schip.crew - pirates_lost, @ship_to_enter.attackers
end
Then /we steel $pieces_of_gold pieces of gold/ do |pieces_of_gold|
assert_equal pieces_of_gold, @my_ship.gold
end
end

16. Integration Testing
Story: Attacking other ships
As Captain Sparrow
I attack another ship
So I can buy more rum
Scenario: Attack first ship
Given another ship
And my ship
And my 20 mateys
When we attack the other ship
Then 1 pirate dies
And we steel 1000 pieces of gold

17. def test_attacking_other_ships
Given "another ship" do |ship|
@ship_to_enter = Ship.find(ship)
end
Given "my ship" do
@my_ship = Ship.find_by_captain("Sparrow")
end
Given /my $number_of_mateys maties/ do |number_of_mateys|
@ship_to_enter.attackers = number_of_mateys
end
When "we attach the other ship" do
@my_ship.attacks(@ship_to_enter)
end
Then /$pirates_lost pirate dies/ do |pirates_lost|
assert_equal @my_schip.crew - pirates_lost, @ship_to_enter.attackers
end
Then /we steel $pieces_of_gold pieces of gold/ do |pieces_of_gold|
assert_equal pieces_of_gold, @my_ship.gold
end
end

18. Test Data
• Mock/stub
• Fixtures
• Factories

19. Mocking & Stubbing
def test_getting_tweet_on_homepage
response = mock
response.stubs(:authorization).returns(true)
response.stubs(:last_tweet).resturns("#arrrrcamp rocks")
TwitterAPI.expects(:get_last_tweet).returns(response)
get 'index'
assert_equal "#arrrrcamp rocks", assigns(:tweet).body
end
- Mocha
- Rspec
- Flex Mock

20. Fixtures
pirates.yml ships.yml
captain_jack_sparrow: black_pearl:
name: Jack Sparrow name: The Black Pearl
enemy: Royal Navy max_crew: 85
captain: captain_jack_sparrow
interceptor:
name: The Interceptor
max_crew: 150
captain: captain_jack_sparrow

21. Factories
Factory.sequence :pirate do |n|
"matey#{n}"
end
Factory.define :ship do |f| should "only find big ships" do
f.name 'Pirateship' Factory(:ship, :max_crew => 500)
f.max_crew 100 Factory(:ship, :max_crew => 200)
f.captain { Factory.next(:pirate) }
end ships = Ship.big_ones
assert_equal 1, ships.size
end
- Factory Girl
- Machinist
- Object Daddy
- Foundry
- Fixjour

22. Questions