Testing applications is one of the most important thing in a developer’s toolbox. Sometime writing tests is not so straightforward and as time goes by you notice that you have to maintain your application and your tests too. The purpose of this talk is to show how to test your domain at different layers with different test frameworks, in order to ease the development process and transform your codebase in a stronghold.

1. CONCURRENT TEST FRAMEWORKS
Andrea Giuliano
@bit_shark

2. Andrea Giuliano
@bit_shark
andreagiuliano.it
$WHOAMI

3. PHPTEST FRAMEWORKS

4. WHICH ONE SHOULD I USE?
CONCENTRATE
AND ASK
AGAIN

5. WHO SAID “ONE”?

6. ISTHETOOLTHE PROBLEM?

7. LET’S START FROMTHE
BEGINNING

8. TEST DRIVEN DEVELOPMENT
Red
GreenRefactor

9. EMERGENT DESIGN

10. TDD AS A PROBLEM

11. TDD AS A PROBLEM
class VideoGalleryTest extends PHPUnit_Framework_TestCase
{
public function testUploadVideo()
{
$videoGallery = new VideoGallery();
$videoGallery->upload('path/on/my/awesome/file.mp4');
$this->assertTrue(is_array($videoGallery->getVideos()));
$this->assertCount(1, $videoGallery->getVideos());
$this->assertInstanceOf(
Video::class,
$videoGallery->getFirstVideo());
}
}

12. TDD AS A PROBLEM
class VideoGalleryTest extends PHPUnit_Framework_TestCase
{
public function testUploadVideo()
{
$videoGallery = new VideoGallery();
$videoGallery->upload('path/on/my/awesome/file.mp4');
$this->assertTrue(is_array($videoGallery->getVideos()));
$this->assertCount(1, $videoGallery->getVideos());
$this->assertInstanceOf(
Video::class,
$videoGallery->getFirstVideo());
}
}
testing internals

13. ISVERSUS DOES

14. IT’S ALL ABOUT BEHAVIOUR

15. DESCRIBING A STORY
Feature:
As a [role]
I want [feature]
So that [benefit]
Scenario: scenario description
Given [context]
When [event]
Then [outcome]

16. A DIFFERENT CYCLE
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition

17. A DIFFERENT CYCLE
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition

18. A DIFFERENT CYCLE
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
Create object and
the behavioural methods

19. A DIFFERENT CYCLE
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
Create object and
the behavioural methods

20. THETOOL
composer require behat/behat --dev

21. DESCRIBING A STORY
Scenario: Getting the total amount for a conference ticket
Given a ticket for the "PHP Day" conference priced EUR100 was
added to the marketplace
When a user adds the "PHP Day" ticket from the marketplace
to the user's shopping cart
Then the overall cart price should be EUR122

22. RUNTHE STORY
$ bin/behat --append-snippets

23. VERBS, NOUNS, BEHAVIOUR
DISCOVERING
/**
* @Given a ticket for the :conference conference priced EUR:price
* was added to the marketplace
*/
public function aTicketForTheConferencePriced($conference, $price)
{
$money = Money::EUR((int) $price);
$ticket = Ticket::forConferencePriced($conference, $money);
$this->marketPlace->add($ticket);
}

24. /**
* @When a user adds the ":conference" ticket
* from the marketplace to the shopping cart
*/
public function aUserAddTheTicketToTheShoppingCart($conference)
{
$this->user->addTicketToCart($conference, $this->marketPlace);
}
VERBS, NOUNS, BEHAVIOUR
DISCOVERING

25. /**
* @Then the overall cart price should be EUR:price
*/
public function theOverallCartPriceShouldBe($price)
{
$money = Money::EUR((int) $price);
$amount = $this->user->shoppingCart()->total();
if (!$amount->equals($money)) {
throw new Exception("Cart amount is not " . $price);
}
}
VERBS, NOUNS, BEHAVIOUR
DISCOVERING

26. DESCRIBETHE BEHAVIOUR
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
Create object and
the behavioural methods

27. THETOOLS

28. DESCRIBINGTICKET CREATION
class TicketTest extends PHPUnit_Framework_TestCase
{
/**
* @test
*/
function should_create_a_ticket_for_conference_priced()
{
$price = Money::EUR(1000);
$ticket = Ticket::forConferencePriced(
'An awesome conference',
$price
);
$this->assertInstanceOf(Ticket::class, $ticket);
}
}

29. OBJECT CREATION
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
Create object and
the behavioural methods

30. THETICKET OBJECT
class Ticket implements TicketInterface
{
private $event;
private $price;
private function __construct($event, Money $price)
{
$this->event = $event;
$this->price = $price;
}
public static function forConferencePriced($conference, Money $price)
{
return new Ticket($conference, $price);
}
}

31. GOING UP
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
Create object and
the behavioural methods

32. SHOPPING CART SPECIFICATION
class ShoppingCartSpec extends ObjectBehavior
{
function it_should_return_the_amount_with_vat(TicketInterface $ticket)
{
$ticket->price()->willReturn(Money::EUR(100.00));
$this->addTicket($ticket);
$expectedMoney = Money::EUR(122.00);
$this->total()->shouldBeLike($expectedMoney);
}
}

33. THE SHOPPING CART OBJECT
class ShoppingCart
{
public function total()
{
$total = Money::EUR(0);
foreach ($this->tickets as $ticket) {
$ticketPriceWithVat = Money::multiply(
$ticket->price(),
self::VAT
);
$total = Money::add($total, $ticketPriceWithVat->amount());
}
return $total;
}
}

34. GOING UP
Describe the behaviours
for ‘verbs’ and ‘nouns’
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
Create object and
the behavioural methods

35. THE GREEN SATISFACTION

36. MOVING OUTWARDLY
Domain
Application
Presentation

37. THE FORTRESS

38. joind.in/14553
Please rate the talk

39. joind.in/14553
Please rate the talk

40. REFERENCES
Assets:
https://www.flickr.com/photos/levork/4966756896
https://www.flickr.com/photos/jenny-pics/7960912752
https://www.flickr.com/photos/joel_baker/12484614505
https://www.flickr.com/photos/mike-f/8628898387
https://www.flickr.com/photos/mike-f/8628898387
https://www.flickr.com/photos/michaeljzealot/6485009571
The RSpec book, Behaviour Driven Development with RSpec, Cucumber, and Friends - D. Chelimsky
Konstantin Kudryashov aka Everzet - Introducing modeling by example
everzet.com/post/99045129766/introducing-modelling-by-example
a special thanks to Giulio De Donato aka liuggio