After having had to accept a return on a graphics card because the one port I didn’t test allegedly didn’t work (haven’t received the card back yet so cannot verify), and hence me selling it as “Tested and Working” constituted “Not as Described”, I have purchased some adapters and I will soon have the ability to test almost* every port I have ever encountered
That means VGA, DVI, HDMI, mini HDMI, micro HDMI, DisplayPort, mini DisplayPort, DMS-59, VIVO 9-pin Mini-DIN, RCA Composite, and S-Video (currently just S-Video to Composite rather than YPBPR Component).
* – Does not include proprietary older ones like 3D out / VESA stereo. But in future I will explicitly state which ports I have not tested.