Cathal Garvey posted his recommendations as to how those without mice can test their designs.  He suggests:

*Think* like the mouse, *be* the mouse!
Alternatively, leave one outside in the country or garden, and await your furry, diseased reward!

But how do you test a one way door/mouse funnel mousetrap if you don’t want to invite mice into your house?  I suppose a box with two such funnels installed with a bit of peanut butter inside.  If you wake up and find no mice or peanut butter – it either worked perfectly1 or it failed miserably2 !  If the mouse is stuck inside…  well I guess it kinda succeeded.

1. as in the mouse left via the second one-way-exit [↩]
2. as in the mouse left the wrong way out the first one-way-exit, just to be a rodent jerk [↩]