michael@0: const Cu = Components.utils;
michael@0: 
michael@0: function run_test() {
michael@0:   // We rely on the crazy "wantXrays:false also causes values return from the
michael@0:   // sandbox to be waived" behavior, because it's the simplest way to get
michael@0:   // waivers out of the sandbox (which has no native objects). :-(
michael@0:   var sb = new Cu.Sandbox('http://www.example.com', {wantXrays: false});
michael@0:   Cu.evalInSandbox("this.foo = {}; Object.defineProperty(foo, 'bar', {get: function() {return {};}});", sb);
michael@0:   do_check_true(sb.foo != XPCNativeWrapper(sb.foo), "sb.foo is waived");
michael@0:   var desc = Object.getOwnPropertyDescriptor(sb.foo, 'bar');
michael@0:   var b = desc.get();
michael@0:   do_check_true(b != XPCNativeWrapper(b), "results from accessor descriptors are waived");
michael@0: }