Economic USB Cable Testers
I was in ShangHai last month and I picked up a USB-C cable test set.
It comprises a SD chip for the software and a loop-around terminator, with LEDs, and a battery powered terminator.
The LED and battery units, as a pair, can verify there are no shorts between pins/cables. The Battery terminator is removed, the software is loaded/run and the screen shows the illuminated LED response to be expected. USD$5.50.
The decent quality USB-C cables, depending on termination types are USD$4.90-5.30.