I really don't understand how strong typing does anything related to testing behavior. I keep seeing this statement and it makes me believe maybe these devs ide

I really don't understand how strong typing does anything related to testing behavior. I keep seeing this statement and it makes me believe maybe these devs idea of testing behavior are testing nulls or maybe trying to pass in hashes with missing keys. What a waste of time. If you don't have tests, all that means is you or somebody else is testing it manually.