Unit-Tests

Unit-TestsSchnell und einfach selbst gemacht

TobiasSchlitt <[email protected]>

PHP World Kongress 2009

2009-11-24

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 1 / 25

About me

Tobias Schlitt <[email protected]>

PHP since 2001

Freelancing consultant

Qualified IT Specialist

Studying CS at TU Dortmund(finishing mid 2010)

OSS addicted

eZ ComponentsPHPUnitVarious other projects . . .


Overview

1 Testing

2 PHPUnit

3 Advanced scenarios (optional)

4 The end


Outline

1 TestingMethods of testingUnit tests

2 PHPUnit


4 The end


A little survey . . .

Do you test?

When?

How?

Who?



Do you test?

When?

How?

Who?



Do you test?

When?

How?

Who?



Do you test?

When?

How?

Who?


Ways of testing

Automatic vs. manual

Developer vs. tester

Internal vs. external

Back end vs. front end

Code vs. appearance

Functional vs. non-functional

Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Ways of testing





Code vs. appearance


Dynamic vs. static


Test methods

Unit tests

Integration tests

Regression tests

Acceptance tests


Unit tests

Validate functionality

Test a single unit of code

Avoid regressions

Verify interfaces

Test bugs dedicatedly

Force code modularization

Migrate safely

Test driven development (TDD)


Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Unit tests



Avoid regressions

Verify interfaces



Migrate safely



Outline

1 Testing

2 PHPUnitInstallationPHPUnit basicsCode examples


4 The end


PHPUnit

Port of JUnit to PHP

Many enhancements

Database testsCode coverageData providers

Invented by Sebastian Bergmann

Standard for unit testing in PHP

http://www.phpunit.de/


http://www.phpunit.de/

Installation

Via PEAR

$ pear channel-discover pear.phpunit.de

$ pear install phpunit/PHPUnit


PHPUnit basics

YourClass


PHPUnit basics

YourClass YourClassTest


PHPUnit basics



PHPUnit basics


TestCase


PHPUnit basics


TestCase

TestRunner


PHPUnit basics


TestCase

TestRunner


Let’s dig into some code

Let’s dig into some code


Outline

1 Testing

2 PHPUnit

3 Advanced scenarios (optional)Custom test environmentTesting a WebDAV serverTesting graphic generationTesting parsers

4 The end


eZ Component test runner

Custom test runner

Integrated auto loadingComponent base testingRun all tests

Extended test case / suite classes

Custom assertionsDatabase testingUtility functions


eZ Webdav component


Semi-automatic regression tests

Manual client test run

Defined test receipe

Capture request / response data

Replay request in unit tests

Detect response regressions


Binary regressions

Binary differences in generated images

Test failures depending on

PHP versionGD versionOperating system

Images visually equivalent


Custom assertions

Custom assertion

Custom equality constraint

Based on ImageMagickAllows defined gap


Untestable code

Parsers are highly dependant

De-coupling hardly possible

Huge amount of mock objects


Integration tests

Test parser as a whole

Small test files

Manually create / validate

Large overall tests

Manual inspection of generated data


Outline

1 Testing

2 PHPUnit


4 The end


Questions / Answers

Questions? Feedback? Critics?


The end

I hope you enjoyed the session

Slides and material

http://schlitt.info/opensourcehttp://www.slideshare.net/tobyS

Contact: Tobias Schlitt <[email protected]>


http://schlitt.info/opensource

http://www.slideshare.net/tobyS

PHPUnderControl


Technology

Unit-Tests