playwright-testing

Automated tests should verify that the application code works for the end users, and avoid relying on implementation details such as things which users will not typically use, see, or even know about such as the name of a function, whether something is an array, or the CSS class of some element. The end user will see or interact with what is rendered on the page, so your test should typically only see/interact wit...

Each test should be completely isolated from another test and should run independently with its own local storage, session storage, data, cookies etc.

Only test what you control. Don't try to test links to external sites or third party servers that you do not control, unless it is specifically for testing purposes.