void TestEscape()
{
var yw=new YAMLWriter(Console.Out,0,60);
Is(yw.Escape("\u0087"),"\"\\u0087\"");
Is(yw.Escape("\ufffe"),"\"\\ufffe\"");
Is(yw.Escape("\ud900"),"\"\\ud900\"");
Is(yw.Escape("\u0085\uffff"),"\"\\N\\uffff\"");
}
