Unit-Tests

Unit-TestsSchnell und einfach selbst gemacht

TobiasSchlitt <toby@php.net>

PHP World Kongress 2009

2009-11-24

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

About me

Tobias Schlitt <toby@php.net>

PHP since 2001

Freelancing consultant

Qualified IT Specialist

Studying CS at TU Dortmund(finishing mid 2010)

OSS addicted

eZ ComponentsPHPUnitVarious other projects . . .

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Overview

1 Testing

2 PHPUnit

3 Advanced scenarios (optional)

4 The end

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Outline

1 TestingMethods of testingUnit tests

2 PHPUnit

3 Advanced scenarios (optional)

4 The end

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A little survey . . .

Do you test?

When?

How?

Who?

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A little survey . . .

Do you test?

When?

How?

Who?

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25

A little survey . . .

Do you test?

When?

How?

Who?

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25

A little survey . . .

Do you test?

When?

How?

Who?

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25

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

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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

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

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

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

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

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

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

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

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

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

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

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

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

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Test methods

Unit tests

Integration tests

Regression tests

Acceptance tests

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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)

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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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

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)

Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

Outline

1 Testing

2 PHPUnitInstallationPHPUnit basicsCode examples

3 Advanced scenarios (optional)

4 The end

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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/

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Installation

Via PEAR

$ pear channel-discover pear.phpunit.de

$ pear install phpunit/PHPUnit

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PHPUnit basics

YourClass

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PHPUnit basics

YourClass YourClassTest

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PHPUnit basics

YourClass YourClassTest

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PHPUnit basics

YourClass YourClassTest

TestCase

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PHPUnit basics

YourClass YourClassTest

TestCase

TestRunner

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PHPUnit basics

YourClass YourClassTest

TestCase

TestRunner

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Let’s dig into some code

Let’s dig into some code

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Outline

1 Testing

2 PHPUnit

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

4 The end

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eZ Component test runner

Custom test runner

Integrated auto loadingComponent base testingRun all tests

Extended test case / suite classes

Custom assertionsDatabase testingUtility functions

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eZ Webdav component

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Semi-automatic regression tests

Manual client test run

Defined test receipe

Capture request / response data

Replay request in unit tests

Detect response regressions

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Binary regressions

Binary differences in generated images

Test failures depending on

PHP versionGD versionOperating system

Images visually equivalent

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Custom assertions

Custom assertion

Custom equality constraint

Based on ImageMagickAllows defined gap

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Untestable code

Parsers are highly dependant

De-coupling hardly possible

Huge amount of mock objects

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Integration tests

Test parser as a whole

Small test files

Manually create / validate

Large overall tests

Manual inspection of generated data

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Outline

1 Testing

2 PHPUnit

3 Advanced scenarios (optional)

4 The end

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Questions / Answers

Questions? Feedback? Critics?

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The end

I hope you enjoyed the session

Slides and material

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

Contact: Tobias Schlitt <toby@php.net>

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PHPUnderControl

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