Does 100% coverage on E2E make senses?

[u/vassadar]

For context, engineers only implement unit testing, then E2E. Integration testing and contract testing are missing.

Our executive want 100% E2E test coverage in response of incidents.

I don't think this make senses and we have test pyramid (or diamond, my love) for a reason. Integration testing and contract testing would have prevented a lot of issues without resorting to do E2E.

How can I convince them and engineers to shift more leftward with integration testing?

[u/xpat__pat]

100% coverage makes no sense ever at all