--- /dev/null
+'use strict';
+
+module.exports = function (t, a) {
+ var T = t, err = new T('My Error', 'MY_ERROR', { errno: 123 });
+ a(err instanceof Error, true, "Instance of error");
+ a(err.constructor, Error, "Constructor");
+ a(err.name, 'Error', "Name");
+ a(String(err), 'Error: My Error', "String representation");
+ a(err.code, 'MY_ERROR', "Code");
+ a(err.errno, 123, "Errno");
+ a(typeof err.stack, 'string', "Stack trace");
+};