Unit Testing

What is Unit Testing?

Testing smallest testable parts of an application. Unit testing only consider about the unit under test. Later you can do integration testing to verify other parts of the application. Unit testing can be very time consuming thing and you need to understand not all flows might not get covered here. Unit testing can be done manually as well as can be automated. 

Using unit testing you can make sure the work you have done has not broken by running the tests. (Definition of Unit Testing).

Benefits of unit testing

• Reduces bugs in production code (by identifying before)
• Automated tests can be run frequently
• Form of documentation
• Inspire confidence (You know your code is working)

https://www.google.lk/search?q=benefits%20of%20unit%20testing

http://martinfowler.com/articles/testing-culture.html

Disadvantages/ When not to use

http://programmers.stackexchange.com/questions/66480/when-is-it-appropriate-to-not-unit-test

Unit Testing Terminology

Mocks : Stand in object used to check results of a test

Fakes : Acts like the real object

Stubs : Provides valid response

Dummies : Contains no implementation 

https://www.google.lk/search?q=unit%20testing%20terminology

Unit testing in JavaScript

http://www.htmlgoodies.com/beyond/javascript/testing-javascript-using-the-jasmine-framework.html

http://jasmine.github.io/

http://mochajs.org/

Unit testing KnockoutJS applications

http://kylehodgson.com/2012/11/29/knockoutjs-and-testing/

http://engineering.picscout.com/2012/12/javascript-mvvm-and-tdd.html

https://www.google.lk/search?q=unit%20testing%20mvvm%20javascript

Some Unit Testing tools

http://www.typemock.com/

For .NET. Not free. 

Resources

http://www.agitar.com/solutions/why_unit_testing.html

http://stackoverflow.com/questions/67299/is-unit-testing-worth-the-effort

http://www.sencha.com/blog/automating-unit-tests Good read
https://softwareengineering.stackexchange.com/questions/tagged/tdd