arpadgbondor / brad_traversy-youtube_tutorials-01-jest_testing_basics

JavaScript Unit Testing - Jest Testing Framework Basics

Brad Traversy - Youtube tutorials 01 - Jest Crash Course

JavaScript Unit Testing - Jest Testing Framework Basics

Tutorial video on Youtube

Run:

• "npm i" to download node_modules
• "npm test" to run the tests
• "npm run testwatch" to run tests every time a file is changed

Notes:

1. functions

• Testing equality on primitive values
• Testing for Truthy & Falsy values
• Testing non-primitive values
• Testing intervals
• Testing strings with regular expressions
• Testing arrays
• Working with async data

2. reversingString

• Testing if the function defined
• Testing if string reverses
• Testing upper case inputs

3. chunk

• Testing if the function defined
• Defining inputs, and checking results separately after the function call

4. anagram

• Testing if the function defined
• Testing logical function

5. before/after functions

• beforeAll/afterAll
• beforeEach/afterEach
• before/after only within a describe block

6. "--watchAll" flag