Some building inspectors will require you to pressurize the tubing before pouring , but this only tests for leaks and in over two thousand systems we have never seen a leak. Although, the potential for damage from sharp ends of rebar or reinforcing wire does exist, a more likely problem is kinking which will restrict the water flow later and will not show on a pressure test. 
If you need to pressurize, start by splicing all of the loops into one loop, then put a pressure gauge on one end, and a ball valve on the other end.