LibTest/convert/JsonEncoder/convert_A02_t01.dart

/*
 * Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion String convert(Object o)
 * If the conversion throws, or returns a value that is not directly serializable,
 * a JsonUnsupportedObjectError exception is thrown.
 * If the call throws, the error is caught and stored in the JsonUnsupportedObjectError's cause field.

 * If a List or Map contains a reference to itself, directly or through other lists or maps,
 * it cannot be serialized and a JsonCyclicError is thrown.

 * Json Objects should not change during serialization.
 * If an object is serialized more than once, stringify is allowed to cache the JSON text for it.
 * I.e., if an object changes after it is first serialized, the new values may or may not be reflected in the result.
 
 * @description Checks that if the object does not support "toJson()" method,
 * a JsonUnsupportedObjectError exception is thrown,
 * and JsonUnsupportedObjectError's cause field is filled.
 * @author kaigorodov
 */
import "dart:convert";
import "../../../Utils/expect.dart";
import "table2.lib.dart";

main() {
  bool failed=false;
  for (Object obj in table) {
    try {
      JsonEncoder enc=new JsonEncoder();
      String res=enc.convert(obj);
      print("error expected but result returned: $res");
      failed=true;
    } on JsonUnsupportedObjectError catch(e) {
      Expect.isNotNull(e.cause);
    }
  }
  Expect.isFalse(failed);
}