![21
HOW HARD CAN IT BE?
class CalculatorSpec extends ObjectBehavior
{
function it_adds_two_numbers()
{
$this->add(4, 5)->shouldReturn(9);
}
function it_multiplies_two_numbers()
{
$this->multiply(3, 8)->shouldReturn(24);
}
function it_does_not_allow_to_divide_by_0()
{
$this
->shouldThrow(‘InvalidArgumentException’)
->during(‘divide’, [10, 0])
;
}
}](https://image.slidesharecdn.com/why-you-should-be-doing-bdd-160226083247/85/Why-you-should-be-doing-BDD-21-320.jpg)
Why you should be doing BDD
- 1. 1 WHY YOU SHOULD BE DOING BDD MATEUSZ ZALEWSKI @mpzalewski https://github.com/Zales0123
- 2. BDD is a process designed to aid the management and the delivery of software development projects by improving communication between engineers and business professionals. BEHAVIOR DRIVEN DEVELOPMENT 2 http://inviqa.com/insights/bdd-guide
- 4. 4 ✦ “There is no time” ✦ “It’s unnecessary extra code” ✦ “I know what I’m writing” ✦ “Client wants visible effect” ✦ and many more…
- 5. BENEFITS 5
- 7. 7 कोड байт MONEY CODE BYTE
- 8. 8 कोड байт MONEY CODE BYTE UBIQUITOUS LANGUAGE
- 11. HOW? 11
- 14. 14 GOAL We are going to increase sale by selling more products
- 15. We are going to increase sale by selling more products GOAL We are planning to achieve a 10% increase in sale in our web store in 4 months 15
- 16. EXAMPLES Given "PHP T-Shirt" is priced at €100.00 And the store has "VAT" tax rate of 23% When I add product "PHP T-Shirt" to the cart Then my cart taxes should be €23.00 16
- 18. 18 SPECIFICATION STORY How class should work Application business logic
- 20. 20 ✦ it adds two numbers ✦ it multiplies two numbers ✦ it subtracts two numbers ✦ it divides two numbers ✦ it not allows to divide by 0 WHAT DOES CALCULATOR DO?
- 21. 21 HOW HARD CAN IT BE? class CalculatorSpec extends ObjectBehavior { function it_adds_two_numbers() { $this->add(4, 5)->shouldReturn(9); } function it_multiplies_two_numbers() { $this->multiply(3, 8)->shouldReturn(24); } function it_does_not_allow_to_divide_by_0() { $this ->shouldThrow(‘InvalidArgumentException’) ->during(‘divide’, [10, 0]) ; } }
- 22. 22 class ValidationMessageProviderSpec extends ObjectBehavior { function it_provides_happy_message_if_validation_passed( Validator $validator, ValidatedObject $object ) { $validator->validate($object)->willReturn(true); $this->provide($object)->shouldReturn(‘Great! Everything is fine!’); } } HAVING FUN WITH MOCKS
- 23. THINK IN CODE CODE IS GOOD 23 http://phpsrbija.rs/tday2014/img/portfolio/phpspec.png
- 24. STORY 24 It is an ancient need to be told stories. But the story needs a great storyteller. ~ Alan Rickman
- 25. FEATURE 25 WHY? (BUSINESS VALUE) WHO? (BENEFICIARY) WHAT? (FEATURE DESCRIPTION)
- 26. FEATURE 26 In order to pay less while buying goods As a Customer I want to receive discount for my purchase Receiving percentage discount promotion on order
- 27. SCENARIO 27 Given "PHP T-Shirt" is priced at €100.00 And the store has "VAT" tax rate of 23% When I add product "PHP T-Shirt" to the cart Then my cart taxes should be €23.00
- 28. BEHAT 28 https://github.com/Behat/Behat ✦ uses Gherkin structured language ✦ used to describe application business logic ✦ really impressive
- 29. 29 ✦ Behat (PHP) ✦ PHPSpec (PHP) ✦ Cucumber (Ruby) ✦ JBehave (Java) ✦ Spock (Groovy) ✦ SpecFlow (.NET) TOOLS
- 30. 30 Have no fear of perfection - you’ll never reach it. ~ Salvador Dali