Emergent design with phpspec
•
25 likes•8,797 views
This document discusses emergent design and test-driven development using PHP and PHPSpec. It emphasizes designing software through describing how objects interact to solve problems, focusing on messaging between objects. Simple design rules like removing duplication and complexity are recommended to make code more testable, modular, and change-friendly. Designing for delegation using mocks is presented as a way to extract collaborators and move behavior definitions.
Recommended
More Related Content
Viewers also liked
Viewers also liked (16)
More from Marcello Duarte
More from Marcello Duarte (12)
Recently uploaded
Recently uploaded (20)
Emergent design with phpspec
- 3. it’s2007
- 14. md@bossa:tests $ phpunit . PHPUnit 3.7.14 by Sebastian Bergmann. PHP Fatal error: Class 'Customer' not found in /Users/mduarte/Documents/NoSync/Lab/phpunit/ tests/CustomerTest.php on line 8 Fatal error: Class 'Customer' not found in / Users/mduarte/Documents/NoSync/Lab/phpunit/ tests/CustomerTest.php on line 8
- 16. public function testUpdateWithEqualTypes() { $installer = $this->createInstallerMock(); $manager = new InstallationManager('vendor'); $manager->addInstaller($installer); $initial = $this->createPackageMock(); $target = $this->createPackageMock(); $operation = new UpdateOperation($initial, $target, 'test'); $initial ->expects($this->once()) ->method('getType') ->will($this->returnValue('library')); $target ->expects($this->once()) ->method('getType') ->will($this->returnValue('library')); $installer ->expects($this->once()) ->method('supports') ->with('library') ->will($this->returnValue(true)); $installer ->expects($this->once()) ->method('update') ->with($this->repository, $initial, $target);
- 17. @_md @everzet
- 24. { "require-dev": { "phpspec/phpspec": "2.0.*@dev" }, "config": { "bin-dir": "bin" }, "autoload": { "psr-0": { "": "src" } } }
- 25. $ bin/phpspec describe Some/Class$ bin/phpspec describe Some/Class
- 26. $ bin/phpspec describe Some/Class $ bin/phpspec run $ bin/phpspec describe Some/Class $ bin/phpspec run
- 27. $ bin/phpspec describe Some/Class $ bin/phpspec run phpspec generators $ bin/phpspec describe Some/Class $ bin/phpspec run phpspec generators
- 28. $ bin/phpspec describe Some/Class $ bin/phpspec run $ editor_of_choice . phpspec generators $ bin/phpspec describe Some/Class $ bin/phpspec run $ editor_of_choice . phpspec generators
- 29. $ bin/phpspec describe Some/Class $ bin/phpspec run $ editor_of_choice . phpspec generators $ bin/phpspec describe Some/Class $ bin/phpspec run $ editor_of_choice . phpspec generators
- 30. $ bin/phpspec describe Some/Class $ bin/phpspec run $ editor_of_choice . phpspec generators $ bin/phpspec describe Some/Class $ bin/phpspec run $ editor_of_choice . phpspec generators
- 31. littledemo
- 32. emergentdesign
- 34. design is ...
- 40. “Key in making great and growable systems is to design how its modules communicate [andnot]whattheirpropertiesandbehavioursshouldbe.” Messaging ViewpointsResearchInstituteSource-BonnieMacbirdURL-http://www.vpri.org
- 41. messaging
- 45. describinghowobjectsinteracttosolveproblems whichroles,responsibilitiesandmessages designsoftware is
- 46. bigdesignupfront
- 51. relativecostofrepaircost time analysis design code test deploy rework $
- 52. yagni
- 62. lackoftestsbreaksinnerquality 1.Viscosity 2.Immobility,Rigidity,Fragility 3.Unreadable 4.Complex
- 65. TestSmells • Lackoftests • Testsarenotunitary • Setupistoocomplex • Unclearexercise • Morethanoneexpectationina test • Noexpectation • Toomanypaths
- 66. DrySmells • Simpleduplication • Logicduplication • Duplicationofconstant • Alternativeclasseswithdifferentinterfaces
- 67. OpacitySmells • Namenotfromdomain • Namenotexpressingintent • Featureenvy • Methoddoesmorethanone thing • Methodtoolong • Primitiveobsession • Commentsinthecode • MiddleMan
- 68. ComplexitySmells • Unnecessaryelse • Unnecessaryif • Unnecessaryswitch • Toomanyargumentspassed • InappropriateIntimacy • Workinconstruction • Staticcontext
- 73. returnavalue modifystate printsomething throwanexception delegate {methods notthefinal behaviour
- 79. Finally • Definenewrole • Extractcollaboratorsusingmocks • Movebehaviourdefinitiontonewcollaboratortest
- 82. Thankyou!