The Ultimate Guide to unit testing in JavaScript!

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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& #39;t comment out tests

- Avoid logic in your tests

- Don& #39;t write unnecessary expectations

- Know your testing framework API

- Consider using factory functions in the tests

- Don& #39;t test multiple concerns in the same test

- Cover the general case and the edge cases

- Test the behavior, not the internal implementation

- Don& #39;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 https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> "Unit tests are code too"

For more details checkout below the blog post.

The Ultimate Guide to unit testing in JavaScript!

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