New RV-about to drive off the lot- Found Leak

rvbc wrote:
no split on repair, manager said they do a pressure test and that it would've been done today.

they are reputable and confident they will do what they can to fix

I will go out there and put a hose on it... would it be fair to hit the slideout from the side with the hose to simulate driving rain or is that a bit too much to expect??

The pressurized interior test is the best indicator. You don't need to direct water on anything. The test will turn up even a pinhole leak.

If it was me, I'd inspect the repair area and if it was anything less than superb, I'd ask for a complete slide out gasket replacement.