JavaScript Unit Testing

Hanoi PHP Day 2010

@hoatle

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JavaScript Unit Testing Framework

Presenter: Hoat Le Van (aka hoatle)» eXo Social Team Leader

» Hanoi PHP Day:

2008: attendee

2009: Advanced JavaScript Techniques

2010: JavaScript Unit Testing Framework

» Work mostly with Java but have much interest in JavaScript

» Twitter: @hoatle

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Agenda

» JavaScript

» Unit Testing

» JavaScript Unit Testing Frameworks

» Fun time for coding

JavaScript

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What is JavaScript?

» An implementation of the ECMAScript language standard

» The King of client-side scripting for web

» A prototype-based object-oriented scripting language

» “The world's most misunderstood programming language” (Douglas Crockford)

The Name

Bad books

Amateurs

Object Oriented?

Unit Testing

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What is Unit Testing?

» Units of source code are tested

» Written and run by developers to ensure that code meets its design and behaves as intended and expected

» Commonly automated

» Extreme Programming uses the creation of unit tests for test-driven development

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Samples (Java - JUnit)

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Samples (Java - JUnit)

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Samples (JavaScript - QUnit)

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Samples (JavaScript - QUnit)

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Test Driven Development (TDD)

» Writes a failing automated test case that defines a desired improvement or new function

» Implements code to pass that test

» Finally refactors

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Test Driven Development (TDD)

(wikipedia)

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Unit Testing Benefits

» To isolate each part of the program and show that the individual parts are correct

» Facilitates change

» Documentation

» Design

JavaScript Unit Testing Frameworks

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JavaScript Unit Testing Frameworks

Fun time for JavaScript Unit Testing and Q&A?