> you should prioritize end to end testing. Test the interface of what you're selling, not the inner workings. E2E tests can be slow and extremely fragile thou

> you should prioritize end to end testing. Test the interface of what you're selling, not the inner workings. E2E tests can be slow and extremely fragile though. They have a place and purpose, but they should not be the only form. Why would you skip entirely over "inner workings" tests that could catch bugs sooner?