I want to ask, someone peed in my glass. I want to find this person and take their urine and the urine in my glass for testing. Can you find out who did it?

Medical tests can only detect the composition and content contained in urine. The composition and content of urine excreted by everyone at different times will change constantly. And even if the chemical test finds the same composition and content, it is impossible to determine whose urine it is. Unless cellular components are found in urine and DNA is determined.