React Testing Library Tutorial - The Net Ninja - with new tests

What is this?

This is my take on the tests in the tutorial. Armed with Laith's excellent explanation, I have tried to write my own tests replacing the tests he has written and doing some (minor) changes to the Todo application.

I have also added a few things such as:

• Code coverage using Jest - minimum threshold of 100% for functions and branches and 95% for lines and statements
• Fixed bugs

Changelog

[30 August 2022]

• Cloned
• Cleaned out all tests, leaving only the app
• Created branch new_tests off of main for writing tests

[1 September 2022]

• Tests for Header
• Tests for TodoFooter

[2 September 2022]

• Tests for TodoList
• Tests for AddInput
• Mocking using jest.mock() and file in __mocks__ returns undefined if the internal function is called; using jest.mock(fn) implementation with mockImplementation() in tests instead

[3 September 2022]

• Tests for FollowersList (have to find a way to move axios mock to its own file - currently not working)
• Fixed issue with hardcoded "Header" showing as title (HTML title attribute) instead of the acutal page title

[5 September 2022]

• Changed value of npm test script to show colored output in terminal
• Added code coverage script and threshold values
• Added test to verify that clicking one todo task does not affect the others (this test is testing an edge case, indicated by missing coverage)