michael@0: const Cu = Components.utils;
michael@0: function run_test() {
michael@0: 
michael@0:   var chromeSB = new Cu.Sandbox(this);
michael@0:   var contentSB = new Cu.Sandbox('http://www.example.com');
michael@0:   Cu.evalInSandbox('this.foo = {a: 2}', chromeSB);
michael@0:   contentSB.foo = chromeSB.foo;
michael@0:   do_check_eq(Cu.evalInSandbox('foo.a', contentSB), undefined, "Default deny with no __exposedProps__");
michael@0:   Cu.evalInSandbox('this.foo.__exposedProps__ = {a: "r"}', chromeSB);
michael@0:   do_check_eq(Cu.evalInSandbox('foo.a', contentSB), 2, "works with __exposedProps__");
michael@0: }