michael@0: function ok(a, msg) {
michael@0:   postMessage({type: 'status', status: !!a, msg: msg });
michael@0: }
michael@0: 
michael@0: onmessage = function(event) {
michael@0:   // URL.href throws
michael@0:   var url = new URL('http://www.example.com');
michael@0:   ok(url, "URL created");
michael@0: 
michael@0:   var status = false;
michael@0:   try {
michael@0:     url.href = '42';
michael@0:   } catch(e) {
michael@0:     status = true;
michael@0:   }
michael@0:   ok(status, "url.href = 42 should throw");
michael@0: 
michael@0:   url.href = 'http://www.example.org';
michael@0:   ok(true, "url.href should not throw");
michael@0: 
michael@0:   status = false
michael@0:   try {
michael@0:     new URL('42');
michael@0:   } catch(e) {
michael@0:     status = true;
michael@0:   }
michael@0:   ok(status, "new URL(42) should throw");
michael@0: 
michael@0:   status = false
michael@0:   try {
michael@0:     new URL('http://www.example.com', '42');
michael@0:   } catch(e) {
michael@0:     status = true;
michael@0:   }
michael@0:   ok(status, "new URL(something, 42) should throw");
michael@0: 
michael@0:   postMessage({type: 'finish' });
michael@0: }