JavaScript Unit Testing
Download as PPTX, PDF0 likes1,218 views
Unit testing is an automated process that verifies the behavior of specific units of code, ensuring each component functions correctly. Good unit tests are automated, repeatable, fast, and easy to understand, ultimately enhancing stability and minimizing defects. The document also discusses Test-Driven Development (TDD) and Behavior-Driven Development (BDD) methodologies, emphasizing their roles in improving code quality, and introduces Jasmine, a behavior-driven testing framework for JavaScript.
JavaScript Unit Testing
- 1. JAVASCRIPT UNIT TESTING Pulak (@pulakb) http://www.pulakonline.com
- 2. What is unit testing?
- 3. What is unit testing? A unit test is an automated piece of code that invokes a unit of work in the system and then checks a single assumption about the behavior of that unit of work.
- 4. What is unit testing? A unit of work is a single logical functional use case in the system that can be invoked by some public interface (in most cases). A unit of work can span a single method, a whole class or multiple classes working together to achieve one single logical purpose that can be verified.
- 5. How to define good unit test?
- 6. How to define good unit test? Automated Repeatable Fast GOOD UNIT TEST Easy to run Incremental Easy to understand
- 7. Why we need unit testing?
- 8. Why we need unit testing? Highly stable solution Integration of different components will be easier New and regression defects can be minimized Good unit testing reduces the test cycle for each phrase Good unit testing can be a good reference for the system documentation
- 10. Test-Driven Development Write test cases for a specific part of your code Write your code to ‘fill in’ the tests. Your code only serves to make all of your tests pass, and nothing more Once all your tests pass, go back and clean your code (Refactoring) TDD gives developers the power to think clearly about the specifications before they engage themselves with implementations.
- 11. Test-Driven Development Writing a failing test case Run the test, Fail? Write application code Run the tests, Success? Refactor ? Refactor the code Yes Yes Yes No No No
- 12. Behavior-Driven Development Write application code first. Test cases must be small and tests one thing. Test a small unit of code instead of the entire application Run test cases against class or method specific for that test case If test fails, fix the defects and test again With BDD, you can write specifications that are small and easy to read.
- 13. Behavior-Driven Development Write class(es) or method(s) Write unit tests Run the tests, Fail? Refactor ? Refactor the code No Yes No Yes Fix the defects
- 14. What is Jasmine?
- 15. What is Jasmine? Jasmine is a behavior-driven testing framework for JavaScript programming language. It does not depend on any other JavaScript frameworks. It does not require a DOM.
- 16. Resources http://jasmine.github.io/ http://jasmine.github.io/1.3/introduction.html http://jasmine.github.io/2.0/introduction.html https://github.com/pivotal/jasmine/tree/master/dist