most AI-generated tests are worse than no tests

i started having claude write tests for my project and quickly realized something: most of them were useless. they passed, but they didn't test anything and i had a major sense of false security seeing 12/12 tests pass, etc. over and over. a test that asserts expect(result).toBeDefined() after calling a function is technically a passing test. it will never fail unless the function throws. this was like 80% of what i was getting. tests that exercised code paths without actually checking that the