> Well we're discussing testing only here, so are you sure none explpded on a test a pad?
Yes! I am sure! That did not happen!
Early development of Saturn V rocket engines involved destructive testing, but a whole rocket would not have been involved at that point.
Here's some later ground testing of final engines: https://www.youtube.com/watch?v=-rP6k18DVdg
It's a weird debarc point to discuss non testing craft vs testing. And "fully assembled", when spacex is flying non-final builds on purpose, using a different test methodology.