Superglobal testing

With respect to testing, isn't this done by `@backupGlobals` of PHPUnit?
https://phpunit.readthedocs.io/en/9.5/an...kupglobals

Thanks for pointing to the documentation. It was interesting )

Initially, I wanted to devote this post to the direct dependence of classes on superglobal arrays.
But I decided that an example with tests would be more suitable for explaining the position.