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CONCURRENT TEST FRAMEWORKS
Andrea Giuliano
@bit_shark
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Andrea Giuliano
@bit_shark
andreagiuliano.it
$WHOAMI
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PHP TEST FRAMEWORKS
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WHICH ONE SHOULD I USE?
CONCENTRATE
AND ASK
AGAIN
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WHO SAID “ONE”?
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IS THE TOOL THE PROBLEM?
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LET’S START FROM THE
BEGINNING
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TEST DRIVEN DEVELOPMENT
Red
Green
Refactor
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EMERGENT DESIGN
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TDD AS A PROBLEM
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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());
}
}
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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
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IS VERSUS DOES
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IT’S ALL ABOUT BEHAVIOUR
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DESCRIBING A STORY
Feature:
As a [role]
I want [feature]
So that [benefit]
Scenario: scenario description
Given [context]
When [event]
Then [outcome]
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A DIFFERENT CYCLE
Write an acceptance test
(Given/When/Then)
Discover ‘verbs’, ‘nouns’
and write a failing step
definition
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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
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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
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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
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THE TOOL
composer require behat/behat --dev
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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
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RUN THE STORY
$ bin/behat --append-snippets
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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);
}
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/**
* @When a user adds the ":conference" ticket
* from the marketplace to the shopping cart
*/
public function aUserAddTheTicketToTheShoppingCart($conference)
{
$this->user->addTicketToCart($conference, $this->marketPlace);
}
VERBS, NOUNS, BEHAVIOUR
DISCOVERING
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/**
* @Then the overall cart price should be EUR:price
*/
public function theOverallCartPriceShouldBe($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
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DESCRIBE THE 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
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THE TOOLS
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DESCRIBING TICKET 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);
}
}
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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
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THE TICKET 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);
}
}
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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
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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);
}
}
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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;
}
}
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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
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THE GREEN SATISFACTION
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MOVING OUTWARDLY
Domain
Application
Presentation
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THE FORTRESS
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joind.in/14553
Please rate the talk
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joind.in/14553
Please rate the talk
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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