Test Driven Web Development

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Test Driven Web Development

• Nirav Mehta
• Linux Bangalore 2004

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Session Plan

• Introduction to test driven development
• Test driven development with PHP
• How to cope up with test driven development
• Experiences

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Test driven development says write test cases
before code!
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Test before code is actually great way to improve
code quality
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You may ask how can we do test driven development
in a web project?

• Very well suited for OO programming
• Web testing available forms, auth etc
• Automated tests fit well for repeatitive tests
• Manual testing otherwise
• UI
• Usability
• Compatibility

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PHP has two good tools available PEARPhpUnit
and SimpleTest
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SimpleTest is a set of classes that empower you
to write, run and manage your test cases
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Here's a small sample

• class CartTestCase extends UnitTestCase
• function testAddToCart()
• cart new Cart()
• result cart-gtadd(1000, 1)
• this-gtassertTrue(result, 'Item added')

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You can assert for true/false, data types,
equality, patterns and errors
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You can also initialize or clean up the test
environment, raise errors, pass or fail tests etc
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Let us write and run some simple test cases for
our shopping cart now
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Faking an object mock objects and server stubs
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It's easy to test web pages with simple pattern
matching and link following
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SimpleTest also allows handling simple form
submissions
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The first thing you need in your web app is
authentication, so you need a way to test and
manage it.
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Alright, this all sounds good.

• But does it really work?

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Yes, test driven development really works,
despite frictions
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TDD also fits very well with an agile development
methodology
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Get on with test driven development
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Questions?
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Thanks

• Linux Bangalore Team
• Resources
• http//www.lastcraft.com/simple_test.php
• Contact Me
• nirav_at_magnet-i.com