Empty diff - Concat swap

[michalbundyra]

Question	Answer
Infection version	0.25.3
Test Framework version	PHPUnit
PHP version	8.0
Platform	-
Github Repo	-

Related to #1524

https://infection-php.dev/r/lpdl

The same issue as described in #1524, it was closed, but not resolved.
Can we somehow skip this mutation, or I need to change my code (for example using str_repeat...) to pass the infection?

Thanks

[maks-rafalko]

Hello,

Can we somehow skip this mutation

yes, please see here https://infection.github.io/guide/how-to.html#How-to-disable-Mutators-and-profiles

or I need to change my code (for example using str_repeat...)

good solution, if the goal of the code is to repeat the same string X times

---

What we can do on Infection side, is to not mutate the code when we see that the variables names are exactly the same on the left and right side of concatenation. So $x . $x won't produce any mutants.

Feel free to make a PR.