Testing

Tier: core — the loop, the pyramid and DAMA apply to every project. The mutation check applies to every declarative behaviour you claim to have tested. Query-count tests are symfony-yoandev-performance's and on demand.

The test is written first, run first, and seen failing first. Everything else in this skill exists to make that possible on a real Symfony application.

The loop

write the test  →  run it  →  see it RED  →  write the code  →  see it GREEN

vendor/bin/phpunit --filter it_refuses_a_rating_of_zero