serializer-test
MRE for breaking symfony/serializer
Steps:
- Clone, cd into it, composer install
- php bin/phpunit tests/SerializerTestCase.php
- RED
It's definitely a problem with the discriminator. If you check out the 3rd commit (d57a3b5ffecf2597a26efd2bc5b49365b831b190), the enum values are normalized according to their case.
I had initially thought it was due to multiple enum's (which is why there are B classes), but it turns out the behavior is tied to an enum with multiple cases