Why is the database cleared after each method in PHPUnit?

Question

Laravel

I'm testing the API. Laravel 7.
In one method I register and authenticate the user.
In another, you need to work with a previously created user.
But the DB is cleared in the second method and the user is no more.

You can, of course, write everything in one method, but this is wrong.
Previously worked in PHPUnit in Laravel 5, there were no such problems.

Answer 1

Tests should not be dependent on each other. Nothing has changed since Laravel 5 - you either added the DatabaseMigrations or the DatabaseTransactions trait. Anyway, leave everything as it is and write normal tests.

Answer 2

You can use another database for testing. Google the phpunit.xml setup for testing