michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: m={}
michael@0: Object.defineProperty(m, 'p', {value: 3});
michael@0: assertThrowsInstanceOf(function() {"use strict"; delete m.p;}, TypeError);
michael@0: 
michael@0: x = new Proxy(m, {})
michael@0: assertEq(x.p, 3);
michael@0: assertThrowsInstanceOf(function fun() {"use strict"; return delete x.p; }, TypeError);