How Important is Testing

Writing tests first can seem overwhelming - But testing actually can make writing code easier!

Transcript

1. How Important is Testing. How Testing makes writing code even more easier!
2. Understanding BDD and TDD • Test Driven Development in simple form is : Write your tests. Watch them fail. Make them pass. Refactor. Repeat.
3. BDD – Behavior Driven Development • BDD – Behavior Driven Development on the other hand is a little more complex. It is more of a team work. • It is more of how a desired behavior should be specified. • In this concept, Business Analysts and Developers should specify behaviors in terms of “User Stories”. • Involving the stake holders in the implementation process through outside-in Software Development. • Now we have our own “Jasmine” which helps us test our JavaScript code in a more TDD way of style. • For more information on BDD learn here (Wiki is the best!)http://en.wikipedia.org/wiki/Behavior- driven_development
4. Real Code! Wohoo…. • If you're all into Rspec, you’ll see Jasmine Framework very similar. describe('JavaScript addition operator', function () { it('adds two numbers together', function () { expect(1 + 2).toEqual(3); }); }); • “Describe” and “it” functions – Take two parameters a string and a function. • Inside “it” block – Write setup code you need for your test. • Ready to write the actual test – Start with the “expect” function.
5. Setting up Jasmine
6. So why the Test?? • Unit tests and test-driven development (TDD) have so many hidden and personal benefits as well as the obvious ones, you just can't really explain to somebody until they're doing it themselves. • Unit tests allows you to make big changes to code quickly. • You know it works now for sure (because you’ve run the tests!) • When you follow TDD no code is considered as bad/buggy/annoying. • Unit test helps you to understand the design of the code that you’re working on.
7. • “One test is worth a thousand expert opinions”. Imagine you writing the test and saying with confidence (that damn thing works!)
8. • Good unit tests can help document and define what something is supposed to do • Unit tests help with code re-use. Migrate both your code and your tests to your new project. Tweak the code till the tests run again. • Writing unit tests can consume a lot of time in the beginning but it’s so much worth it. Sold! You know it’s good for you, then why not start testing your code.
9. • Good unit tests can help document and define what something is supposed to do • Unit tests help with code re-use. Migrate both your code and your tests to your new project. Tweak the code till the tests run again. • Writing unit tests can consume a lot of time in the beginning but it’s so much worth it. Sold! You know it’s good for you, then why not start testing your code.
10. Resources! • BDD Wiki • TDD Wiki • https://github.com/jasmine/jasmine/wiki • Rspec Rails • http://agiledata.org/essays/tdd.html • http://c2.com/cgi/wiki?TestDrivenDevelopment Books: • http://www.amazon.com/Test-Driven-Development-By- Example/dp/0321146530 • http://www.amazon.com/dp/0596006896/?tag=stackoverfl08 -20 • http://www.growing-object-oriented-software.com/
11. Have fun testing!  Follow me on Twitter: @SanaNasar_