How to perform a water-tightness test for bathroom waterproofing

The biggest fear with bathroom water-tightness tests is rushing the process and draining the water after only a few hours. Just because it doesn't leak on the surface doesn't mean the wall bases, pipe roots, and threshold stones are secure. I once saw a bathroom where the water-tightness test was too short; the downstairs neighbor didn't report any issues, so they proceeded to tile. After moving…