// 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 approxEquals(num expected, num actual,
///     [num tolerance = null, String reason = null])
/// Passing null as either expected or actual results in Error. 
/// @description Checks that Error is thrown if any of the required arguments
/// are null.
/// @author rodionov

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

main() {
  check(null, 0);
  check(null, 0, null, "");
  check(null, 0, null, "not empty");

  check(0, null);
  check(0, null, null,  "");
  check(0, null, null,  "not empty");

  check(null, null);
  check(null, null, null,  "");
  check(null, null, null,  "not empty");

  check(null, 0, 0);
  check(null, 0, 0, "");
  check(null, 0, 0, "not empty");

  check(0, null, 0);
  check(0, null, 0, "");
  check(0, null, 0, "not empty");

  check(null, null, 0);
  check(null, null, 0, "");
  check(null, null, 0, "not empty");
}

void check(num? arg1, num? arg2, [num? tolerance = null, String reason = '']) {
  try {
    Expect.approxEquals(arg1 as num, arg2 as num, tolerance, reason);
    Expect.fail("Error expected");
  } on Error catch(e) {
  }
}