behavioural driven development in zf2

Behavior-Driven Development with Zend Framework 2

Zend Framework Day – Turin, Italy – 07/02/2014

DAVID CONTAVALLI

@mauipipe

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CLEAN CODE ADEPT BDD FANATIC

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CLEAN CODE ADEPT BDD FANATIC

WHAT IS BDD?

TDD Evolution

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1. You are not allowed to write any production code

unless it is to make a failing unit test pass.

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SAME RULES



2. You are not allowed to write any more of a unit test than is sufficient to fail; and compilation failures are failures.

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SAME RULES



2. You are not allowed to write any more of a unit test than is sufficient to fail; and compilation failures are failures.

3. You are not allowed to write any more production code than is sufficient to pass the one failing unit test.

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SAME RULES

WHAT’S THE DIFFERENCE?

TDD STARTS FROM COMPONENTS

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CREATE THE TEST

private $calculator; function setUp(){ $this->calculator = new Calculator(); } function testSumTwoPositive(){ $expectedResult = 8; $result = $this->calculator(6,2); assertEquals($expectedResult,$result); }

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WRITE QUICK, TEST VALIDATING CODE

class Calculator{ public function sum($num1, $num2){ return 8; } }

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REFACTOR

class Calculator{ public function sum($num1, $num2){ $sum = $num1 + $num2; return $sum; } }

BDD STARTS FROM AN EXAMPLE

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SPECIFICATION BY EXAMPLE

Scenario: Add two number Given I fill number1 field with 2 And I fill number2 field with 6 When I press Add button Then the result should be 8

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A COMMON LANGUAGE

STAKEHOLDER

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DEVELOPER

STAKEHOLDER

A COMMON LANGUAGE

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DEVELOPER

STAKEHOLDER USER

A COMMON LANGUAGE

LIVING DOCUMENTATION

HOW IS STORY CODE RELATED?

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GHERKIN

Scenario: Add two number Given I fill number1 field with 2 And I fill number2 field with 6 When I press Add button Then the result should be 8

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Interpreted in many languages

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GHERKIN

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GHERKIN

WHAT IS BEHAT?

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Scenario: Add two numbers Given I fill number1 field with value of 2

TRANSLATE

/** * @Given /^I fill ([^’’]*) with (\d+)$/ **/ public function iFieldFieldWith($number, $fieldName) { throw new PendingException(); }

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EXECUTION

USERS WILL NOT READ STORIES

THEY WILL USE AN UI

BROWSER

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HOW TO TEST BROWSER WITH BEHAT?

HERE IT COMES, MINK!

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GHERKIN

+

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GOUTTE • Headless Browser • No Javascript • Really fast

Web Acceptance Test

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SELENIUM • Can test Javascript • Really slow • Use Firefox as emulator

Web Acceptance Test

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Zombie.js • Can test Javascript • Medium • Use Firefox as emulator

Web Acceptance Test

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Zombie.js • Can test Javascript • Medium • Use Firefox as emulator

SAHI • Can test Javascript • slow • Emulate every Browser

Web Acceptance Test

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/** * @When /^I press ‘’(/[^’’]*)’’ button$/ **/ public function iPressButton($buttonName) { $this->pressButton($buttonName); }

Scenario: Add two numbers Given I fill number1 field with 2 And I fill number2 field with 6 When I press Add button Then the result should be 8

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How to install....

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"require-dev " :{ ......... "behat/behat" : "2.4.*@stable", "behat/mink": "1.5.0", "behat/mink-extension":"*", "behat/mink-browserkit-driver":"dev-master", "behat/mink-goutte-driver":"*", "phpspec/phpspec":" 2.0.*@dev" }

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Differs from documentation

because there is a fix for ZF2

multicheckbox selection

"require-dev " :{ ......... "behat/behat" : "2.4.*@stable", "behat/mink": "1.5.0", "behat/mink-extension":"*", "behat/mink-browserkit-driver":"dev-master", "behat/mink-goutte-driver":"*", "phpspec/phpspec":" 2.0.*@dev" }

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default : extensions : Behat\MinkExtension\Extension : base_url : 'http://example.com' goutte : ~

behat.yml

Mink Setup

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+

+

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private static app; /** * @BeforeSuite **/ public static function initializeZf(){ If(self::$zendApp === null){ $path = __DIR__ .’/../../config/application.config.php’; self::app = \Zend\Mvc\Application::init(require $path); } }

Static method

ZF2 EXTENSION

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"require-dev":{ ................ "mvlabs/zf2behat-extension":"dev-master" },

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default : extensions : MvLabs\Zf2Extension\Zf2Extension : config : config/application.config.php module :

behat.yml

Zf2 Behat Extension

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bin/behat --init ‘’module name’’ run from console

Zf2 Behat Extension

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class FeatureContext extends MinkContext implements Zf2AwareContextInterface{ private $zf2MvcApplication; ......... public function setZf2App(Application $zf2MvcApplication) { $this->zf2MvcApplication = $zf2MvcApplication; } }

Implements Zf2AwareContextInterface

Feature Context

WE STILL NEED TO TEST OUR COMPONENTS

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GHERKIN

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WHY PHPSPEC?

BDD BASED ON BEHAVIOUR DESCRIPTION

Robert C. Martin

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private $calculator; function setUp(){ $this->calculator = new Calculator(); } function testSumTwoPositive(){ $expectedResult = 8; $result = $this->calculator(6,2); assertEquals($expectedResult,$result); }

PHPUnit focus on testing code

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function let(){ $this->shouldBeConstructed(); } function it_sum_two_positive_number(){ $this->sum(2,6)->shouldReturn(8); }

PHPSpec focus on code behavior

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"It’s this unexisting object, on which you’re calling unexisting methods and assuming future outcomes. Most important thing? There could be only one SUS in specification" Kostantin Kudryashov

Subject under Specification

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Developer Tool Vs Testing Framework

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bin/phpspec desc ‘’Application\Controller\IndexController’’

Autogenerates classes & methods

PROMOTES CLEAN CODE

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function let(){ $this->shouldBeConstructed(); } function it_sum_two_positive_number(){ $this->getPlayer()->getSword()->shouldBeInstanceOf(‘Sword’); }

Demeter Law's Violation

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function let(){ $this->shouldBeConstructed(); } function it_sum_two_positive_number(){ $this->getPlayer()->getSword()->shouldBeInstanceOf(‘Sword’); }

Impossible

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Add PHPSpec to Zf2

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"require-dev":{ ........... "phpspec/phpspec" : "2.0.*@dev" }, "config": { "bin-dir": "bin/" }, "autoload": { "psr-0" { "Application" : " module/Application/src" } }

’’require-dev’’:{ ... "phpspec/phpspec":" 2.0.*@dev" }, "config": { "bin-dir": "bin« }, "autoload": { "psr-0": { "Application": "module/Application/src" } }

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"require-dev":{ ........... "phpspec/phpspec" : "2.0.*@dev" }, "config": { "bin-dir": "bin/" }, "autoload": { "psr-0" { "Application" : " module/Application/src" } }

Add a single module

mailto:2.0.*@dev

mailto:2.0.*@dev

mailto:2.0.*@dev

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"require-dev":{ ........... "phpspec/phpspec" : "2.0.*@dev" }, "config": { "bin-dir": "bin/" }, "autoload": { "psr-0" { "Application" : " module/Application/src", "Calculator" : "module/Calculator/src" } }

Add more modules

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formatter.name : progresssuites Application: namespace : Application spec_prefix : Spec src_path : 'module/Application/src/' spec_path : 'module/Application/' ModuleDemo: namespace : ModuleDemo spec_prefix : Spec src_path : 'module/ModuleDemo/src/' spec_path : 'module/ModuleDemo/'

Create phpspec.yml in project root

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What to test with PHPSpec?

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1.Model Logic


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1.Model Logic

2.Factories


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1.Model Logic

2.Factories

3.Validation


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1.Verbose Stories

2.Using Mink to test REST calls

3.Testing every possible usages combination

4.Fixture loading within Context

Behat bad practices

WHY TESTING?

IT’S A TREND

SOMEONE WILL READ YOUR CODE

IT COULD BE YOU SOME DAY

YOUR COLLEAGUES

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OR

A VIOLENT PSYCHOPATH WHO KNOWS WHERE YOU LIVE

Thank you for your attention

David Contavalli @mauipipe

QUESTIONS?

@mauipipe [email protected]

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Some readings

Credits

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https://www.flickr.com/photos/42788859@N00/318947873

https://www.flickr.com/photos/79811974@N08/8895959339/

https://www.flickr.com/photos/wingedwolf/5471047557/




http://www.flickr.com/photos/chemicalbrother/2540855983/

http://www.flickr.com/photos/slworking/5757370044/

http://www.flickr.com/photos/ter-burg/5807937726/

http://www.flickr.com/photos/thyagohills/5023536434/

http://www.flickr.com/photos/jeremybrooks/2175042537/

http://www.flickr.com/photos/bowmanlibrary/941844481/

http://www.flickr.com/photos/webhamster/2476756607/

http://www.flickr.com/photos/nebirdsplus/5835963068/

http://www.flickr.com/photos/mistaboos/4348381987/

http://www.flickr.com/photos/moofbong/4207382992/

http://www.flickr.com/photos/ryanh/43936630/

http://www.flickr.com/photos/nathangibbs/98592171/

http://www.flickr.com/photos/71894657@N00/2553948289/

http://www.flickr.com/photos/ahia/3168219760/

http://www.flickr.com/photos/smileham/3559228586/

http://www.flickr.com/photos/kk/3834592792/

http://www.flickr.com/photos/enoughproject/5776533975/

http://www.flickr.com/photos/_flood_/8067625282/

http://www.flickr.com/photos/drooo/3114233333/

http://www.flickr.com/photos/84143785@N00/3559757811























































David Contavalli @mauipipe

behavioural driven development in zf2

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