Unit Testing PHP

Unit Testing Making sure that stuff works Boring :-( What is Unit Testing? Writing code to make sure that your code works Part of the development phase, not the testing phase Fun :-D What is testing?

Making sure that stuff works

Boring :-(

What is Unit Testing?

Writing code to make sure that your code works

Part of the development phase, not the testing phase

Fun :-D

What is testing?

Examples The Simplest Test Ever Written Something a bit more exciting http://demo.pointbeing.net/unittesting/

The Simplest Test Ever Written

Something a bit more exciting

http://demo.pointbeing.net/unittesting/

Test-Driven Development Write the test first, then write the code to pass the test Mantra: Red, Green, Refactor Code is guaranteed to have full test coverage

Write the test first, then write the code to pass the test

Mantra: Red, Green, Refactor

Code is guaranteed to have full test coverage

Bug Fixing Strategy Write the smallest possible test that exposes the bug – formalise the bug as a failing test (red)‏ Do whatever it takes to make the test pass (green)‏ Tidy up and remove duplication (refactor) The bug is fixed, and can never reappear...so long as you run the tests!

Write the smallest possible test that exposes the bug – formalise the bug as a failing test (red)‏

Do whatever it takes to make the test pass (green)‏

Tidy up and remove duplication (refactor)

The bug is fixed, and can never reappear...so long as you run the tests!

Benefits You can be confident that your code does what it's supposed to Code is cleaner, classes and methods are simpler – code suddenly has “units” Formal refactoring becomes a possibility Time spent debugging is decimated; bugs do not magically reappear You CV is stronger, and you earn more

You can be confident that your code does what it's supposed to

Code is cleaner, classes and methods are simpler – code suddenly has “units”

Formal refactoring becomes a possibility

Time spent debugging is decimated; bugs do not magically reappear

You CV is stronger, and you earn more