ContainerGetToConstructorInjectionRector should ignore PHPUnit or KernelTestCase classes

[alexander-schranz]

When having ContainerGetToConstructorInjectionRector activated it tries to refractor the PHPUnit KernelTestCase classes to constructor. But as this are not service this should be avoided.

I tried to contribute it but I found not yet a way how I can check in

rector-symfony/src/Rector/MethodCall/ContainerGetToConstructorInjectionRector.php

Line 77 in 6f0f3d1

public function refactor(Node $node): ?Node

if the $node is inside a PHPUnit TestCase class / KernelTestCase class.