michael@0: /*
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/
michael@0:  */
michael@0: 
michael@0: /* A stock watcher function. */
michael@0: var watcherCount;
michael@0: function watcher(id, oldval, newval) { watcherCount++; return newval; }
michael@0: 
michael@0: /* Create an object with a JavaScript setter. */
michael@0: var setterCount;
michael@0: var o = { w:2, set x(v) { setterCount++; } };
michael@0: 
michael@0: /*
michael@0:  * Put the object in dictionary mode, so that JSObject::putProperty will 
michael@0:  * mutate its shapes instead of creating new ones.
michael@0:  */
michael@0: delete o.w;
michael@0: 
michael@0: /*
michael@0:  * Place a watchpoint on the property. The watchpoint structure holds the
michael@0:  * original JavaScript setter, and a pointer to the shape.
michael@0:  */
michael@0: o.watch('x', watcher);
michael@0: 
michael@0: /*
michael@0:  * Replace the accessor property with a value property. The shape's setter
michael@0:  * should become a non-JS setter, js_watch_set, and the watchpoint
michael@0:  * structure's saved setter should be updated (in this case, cleared).
michael@0:  */
michael@0: Object.defineProperty(o, 'x', { value:3,
michael@0:                                 writable:true,
michael@0:                                 enumerable:true,
michael@0:                                 configurable:true });
michael@0: 
michael@0: /*
michael@0:  * Assign to the property. This should trigger js_watch_set, which should
michael@0:  * call the handler, and then see that there is no JS-level setter to pass
michael@0:  * control on to, and return.
michael@0:  */
michael@0: watcherCount = setterCount = 0;
michael@0: o.x = 3;
michael@0: assertEq(watcherCount, 1);
michael@0: assertEq(setterCount, 0);
michael@0: 
michael@0: reportCompare(true, true);