{"ScriptPreparationCode":"var err = new Error(\u0027Err\u0027)","TestCases":[{"Name":"instanceof","Code":"err instanceof Error ","IsDeferred":false},{"Name":"Object.prototype.toString.call","Code":"Object.prototype.toString.call(err) === \u0022[object Error]\u0022","IsDeferred":false},{"Name":"hasOwnProperty(\u0022message\u0022)","Code":"err.hasOwnProperty(\u0022message\u0022)","IsDeferred":false}]}