JavaScript testing #18. E2E Playwright tests for uploading and downloading files
Briefly

Implementing End-to-End tests for file input and download functionalities in React with Playwright ensures proper application behavior.
The process involves creating components for file input, formatting, and error handling, along with the preparation of sample JSON files for testing.
Use Playwright to interact with the file input element, locate it on the page, and test user scenarios with both valid and invalid files.
Read at Marcin Wanago Blog - JavaScript, both frontend and backend
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