The document discusses Behavior Driven Development (BDD) and testing in PHP. It introduces BDD and some common problems in testing like how to test dependencies. It then discusses tools for PHP testing like PHPUnit and PHP Spec 2. PHP Spec 2 is presented as a BDD framework for PHP that makes testing easy with matchers, test doubles and a TDD cycle approach. Examples are provided of how to write tests in PHP Spec 2.

1. SPEC BDD
IN PHP
@cakper

2. 13/06/13 GliwiceSpec BDD IN PHP
Software Engineer @SensioLabsUK
Silesia PHP User Group // Spug.pl
#symfony-pl // Symfonylab.pl
@CAKPER

3. 13/06/13 GliwiceSpec BDD IN PHP
WHAT IS TEST?

4. 13/06/13 GliwiceSpec BDD IN PHP
WHY DO WE TEST?

5. 13/06/13 GliwiceSpec BDD IN PHP
HOW DO WE TEST?

6. 13/06/13 GliwiceSpec BDD IN PHP
WE MAKE MISTAKES
SO WE HAVE TO TEST

7. 13/06/13 GliwiceSpec BDD IN PHP
TEST
DRIVEN
DEVELOPMENT
Kent Beck // 2003
Extreme Programming // 1999

8. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #1
How to test something that
does not exist?

9. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #1
TEST == Specification
Driven
Development

10. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #1
Communication
is our ProblemNot testing itself

11. 13/06/13 GliwiceSpec BDD IN PHP
BEHAVIOUR
DRIVEN
DEVELOPMENT
Dan North // 2006

12. 13/06/13 GliwiceSpec BDD IN PHP
BDD
Naming
ConvenTions
tools
Better
{

13. 13/06/13 GliwiceSpec BDD IN PHP
BDD
= TDD v2.0‘TDD DONE RIGHT’

14. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #2
Writing specifications
takes time
Time is a cost

15. 13/06/13 GliwiceSpec BDD IN PHP
you can learn it

16. 13/06/13 GliwiceSpec BDD IN PHP
DELIBERATE PRACTICE
Pair Programming
Code Kata
Code Club
Code Retreat

17. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #3
Why are you sure that your
test is correct?

18. 13/06/13 GliwiceSpec BDD IN PHP
TDD CYCLE
RED
GREENREFACTOR

19. 13/06/13 GliwiceSpec BDD IN PHP
3 LAWS OF TDD
1.You are not allowed to write any production
code unless it is to make a failing unit test pass.
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.

20. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #4
When and how to Refactor?

21. 13/06/13 GliwiceSpec BDD IN PHP
‘Refactoring w/o tests
= Refucktoring’
PROBLEM #4

22. 13/06/13 GliwiceSpec BDD IN PHP
4 RULES OF SIMPLE DESING
1.Passes all the tests.
2.Express every idea we need to express.
3.Contains no duplication.
4.Minimized the number of classes,
methods and other moving parts.

23. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #5
How to test dependencies?

24. 13/06/13 GliwiceSpec BDD IN PHP
DO NOT TEST...

25. 13/06/13 GliwiceSpec BDD IN PHP
TEST DOUBLES
DUMMies
STUBS
MOCKS
SPIES

26. 13/06/13 GliwiceSpec BDD IN PHP
Mocking should be easy
very easy

27. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #6
Code Coverage

28. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #6
Useful to
find dead code ;)

29. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #7
STORY BDD
vs
Spec BDD

30. 13/06/13 GliwiceSpec BDD IN PHP
STORY BDD
description of
business-targeted
application behavior

31. 13/06/13 GliwiceSpec BDD IN PHP
SPEC BDD
specification for
low-level implementation

32. 13/06/13 GliwiceSpec BDD IN PHP
PROBLEM #8
PHP UNIT
By Sebastian Bergmann©

33. 13/06/13 GliwiceSpec BDD IN PHP
PHP Spec 2

34. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
Framework Spec BDD
@_md & @everzet
Prophecy

35. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
EASY to use
TDD-Cycle oriented
Behaviour focused

36. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
Test Case
Specification

37. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
Test
example

38. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
Assert
Expectation

39. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
class MarkdownSpec extends ObjectBehavior
{
function it_is_initializable()
{
$this->shouldHaveType('Markdown');
}
}

40. 13/06/13 GliwiceSpec BDD IN PHP
MATCHERS
Identity (===):
shouldReturn()
shouldBe()
shouldEqual()
shouldBeEqualTo()

41. 13/06/13 GliwiceSpec BDD IN PHP
MATCHERS
Comparison (==):
shouldBeLike()

42. 13/06/13 GliwiceSpec BDD IN PHP
MATCHERS
Throw:
shouldThrow(‘Exception’)
->duringSomeMethod()

43. 13/06/13 GliwiceSpec BDD IN PHP
MATCHERS
Type:
shouldBeAnInstanceOf()
shouldReturnAnInstanceOf()
shouldHaveType()

44. 13/06/13 GliwiceSpec BDD IN PHP
MATCHERS
Object State:
shouldHave**()

45. 13/06/13 GliwiceSpec BDD IN PHP
TEST DOUBLES
/**
* @param MarkdownStream $stream
*/
function it_adds_a_end_of_list_to_markup($stream)
{
$stream->getNextLine()->willReturn("");
$this->format(" * Hi, there", $stream)
->shouldReturn("</li></ul>");
}

46. 13/06/13 GliwiceSpec BDD IN PHP
LET & LETGO
function let($die)
{
$die->beADoubleOf('Die');
$this->beConstructedWith($die);
}
function it_live_and_let_die($die)
{
$this->liveAndLet()->shouldReturn($die);
}
function letgo(){}

47. 13/06/13 GliwiceSpec BDD IN PHP
PHP SPEC 2
{
"require-dev": {
"phpspec/phpspec": "2.0.*@dev"
},
"config": {
"bin-dir": "bin"
},
"autoload": {"psr-0": {"": "src"}}
}

48. 13/06/13 GliwiceSpec BDD IN PHP
Demo

49. 13/06/13 GliwiceSpec BDD IN PHP
Questions?

50. 13/06/13 GliwiceSpec BDD IN PHP
WE ARE HIRING!
Software Engineer
Front-end Engineer
Software Engineer in test
PRoject manager
Business analyst
www.sensiolabs.co.uk
www.inviqa.com

51. THANK YOU!
@cakper