What are the challenges while Testing a Robot?

I am a graduate student at UTA. Planning to do thesis related to testing of robots. Could anyone please let me know challenges in the industry while t
esting robots.
Building a test oracles and reducing domain input space with mathematical m odels for complex robots are the toughest challenges in testing of robots. Exploring in these areas are good choice to do thesis? please suggest me th e recent trends and focus areas that strengthen the testing of Robots?
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anil Mullapudi schrieb:

How do you distinguish robot software from other programs?
DoDi
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