Daily is a CPaaS vendor focusing on faster time to market with a mixture of APIs and Prebuilt (lowcode/nocode) solutions.
If you are using Daily, then your best starting point for testRTC testing scripts for Daily WebRTC applications would be to use the samples created by Daily directly.
Read more about the Daily test scripts: Testing Daily’s WebRTC performance with testRTC
Github repo (sample app+scripts): https://github.com/daily-co/testrtc-client
Note: These scripts are written and maintained by Daily