[chewxy]

A good way to explore the algorithms of the robot is to set it out to run in the night. At the entrance of the room, set a high obstruction. Set up a tripod. Take long exposure photos every minute or so. Then turn on the lights/wait till day time. Take another photo. Overlay the photos in an editor program. Spot the missing areas.

EDIT: here are some examples by other people: https://spectrum.ieee.org/automaton/robotics/home-robots/lon...

And here are some resources if you have a Xiaomi robot vacuum cleaner (also sold as RoboRock) https://github.com/dgiese/dustcloud

[jwandborg]

I'm assuming you forgot to mention the light on the robot in the dark.

In order to get the progression of the run, you could have an RGB LED sweeping through a color scale during the run.

[amelius]

And make sure that any LED on the robot is visible from the direction of the camera regardless of the orientation of the robot ;)

[Goz3rr]

The Xiaomi ones map out and display their path in the app, no long exposure photos needed

[systemtest]

The Roomba e5 I briefly owned only worked with all the lights on.