Setting up a test jig for any cable connector with a multimeter is easy enough, especially if you have a junk drawer. You can even do things then like test for Type A or B TRS MIDI, or for shorts, etc.
Junk Drawer Power
Wire, a resistor, a power source and an LED, is all you need for a continuity tester. ( post )
TIP : When testing any cable be sure to wiggle it while testing to find the intermittent failure. You’d hear a drop out in audio, but with MIDI a drop out can be a WTF ?