Need Test jig for pass transistors
Being a Test Engineer after R&amp;D for decades, I like these kind of questions.

If you are wanting only "one" single most important test and have it only take 1 second in a socket, this is the one you want to do.

Vce(sat)=1.0V max @Ic=15A pulsed @ Ic/Ib=10

See Note 3, pulse duration is not that critical just low duty cycle for no heat sink needed to keep at 25'C  (N.B.!!)

I could design a TO-3 socket test fixture (with an Astable pulse gen) to drive a repetitive low freq. 100us pulse from a 10 Ohm source into a 3 Ohm load or use a Vcc=3.3V and change the values then measure the pulsed Vce with a S&amp;H and DMM or a scope.  ESR of source must be included for base drive R (N.B.)

Here is the setup for PNP which is merely the inverse for NPN from the datasheet which is always the reference circuit you want to emulate with minor changes as required. Proper short (low ESL) signals &amp; ground wires are essential to accurate signal measurement to avoid ringing.


This will only verify what the Mfg verifies in their automated test, but will not guarantee your design will work. (N.B.!!)  But hopefully the design of the LDO was done correctly.