The Ultimate Guide to unit testing in JavaScript!

A Thread...

A unit test should test the behavior of a unit of work.

Unit tests are isolated and independent of each other.

- Any given behaviour should be specified in one and only one test

- The execution/order of execution of one test cannot affect the others

- Repeatable

- Fast

Ultimate Guidelines Which Helped Me a Lot.

- Whenever possible, use TDD

- Structure your tests properly

- Name your tests properly

- Don't comment out tests

- Avoid logic in your tests

- Don't write unnecessary expectations

- Know your testing framework API

- Consider using factory functions in the tests

- Don't test multiple concerns in the same test

- Cover the general case and the edge cases

- Test the behavior, not the internal implementation

- Don't mock everything

- Create new tests for every defect

- Test simple actions

- Review test code first

- When applying TDD, always start by writing the simplest failing test

- When applying TDD, always make small steps in each test-first cycle

- Properly setup the actions that apply to all the tests involved

Remember "Unit tests are code too"

For more details checkout below the blog post.

The Ultimate Guide to unit testing in JavaScript!

from @hashnode https://codelifefitness.hashnode.dev/the-ultimate-guide-to-unit-testing-in-javascript