Utils/tests/Expect/setEquals_A03_t01.dart

// Copyright (c) 2011, 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 static void setEquals(
///   Iterable expected, Iterable actual, [String reason = ''])
/// Descriptive error message is provided in case of failure.
/// @description Checks that message of thrown ExpectException includes 
/// representation of extra and missing elements, as well as the reason.
/// @author varlax

import "../../../Utils/expect.dart";

main() {
  check(
      [0, 235892385, 1, "abracadabra"],
      [0, 235892385, 2 , "abracadabra"],
      [1, 2]
      );
  
  check(
      [1,2,3],
      [2,3],
      [1],
      "blah sdsder rt3 4");

  check(
      [234,456,777],
      [92374,3425,"assa"],
      [234,456,777,92374,3425,"assa"],
      "4 4 44  45  45 2__");
}

void check(Iterable arg1, Iterable arg2, Iterable arg3, [String reason = '']) {
  try {
    Expect.setEquals(arg1, arg2, reason);
    throw new Exception("ExpectException expected");
  } on ExpectException catch(e) {
    String msg = e.message as String;
    for (var el in arg3) {
      if (!msg.contains(el != null ? el.toString() : "null", 0))
        throw "no element $el";
    }
    if (!reason.isEmpty && !msg.contains(reason, 0)) throw "no reason";
  }
}