/* * Any copyright is dedicated to the Public Domain. * http://creativecommons.org/licenses/publicdomain/ */ /* A stock watcher function. */ var watcherCount; function watcher(id, old, newval) { watcherCount++; return newval; } /* Create an object with a value property. */ var o = { w:2, x:3 }; /* * Place a watchpoint on the value property. The watchpoint structure holds * the original JavaScript setter, and a pointer to the shape. */ o.watch('x', watcher); /* * Put the object in dictionary mode, so that JSObject::putProperty will * mutate its shapes instead of creating new ones. */ delete o.w; /* * Replace the value property with a setter. */ var setterCount; o.__defineSetter__('x', function() { setterCount++; }); /* * Trigger the watchpoint. The watchpoint handler should run, and then the * setter should run. */ watcherCount = setterCount = 0; o.x = 4; assertEq(watcherCount, 1); assertEq(setterCount, 1); reportCompare(true, true);