// 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  abstract int truncate()
/// Returns the integer obtained by discarding any fractional digits from this.
/// @description Checks [:truncate():] on a bunch of values.
/// @author pagolubev

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

check(num expected, double argument) {
  Expect.equals(expected, argument.truncate());
  Expect.equals(-expected, (-argument).truncate());
}

main() {
  check(1, 1.0000000000000002);
  check(0, 0.9999999999999999);
  check(1, 1.1);
  check(0, 0.9);
  check(1, 1.4999999999999998);
  check(1, 1.5000000000000002);

  check(2.0, 2.0000000000000004);
  check(1.0, 1.9999999999999998);
  check(2.0, 2.1);
  check(1.0, 1.9);
  check(2.0, 2.4999999999999996);
  check(2.0, 2.5000000000000004);

  check(3.0, 3.0000000000000004);
  check(2.0, 2.9999999999999996);
  check(3.0, 3.1);
  check(2.0, 2.9);
  check(3.0, 3.4999999999999996);
  check(3.0, 3.5000000000000004);

  check(1024.0, 1024.0000000000002);
  check(1023.0, 1023.9999999999999);
  check(1024.0, 1024.1);
  check(1023.0, 1023.9);
  check(1024.0, 1024.4999999999998);
  check(1024.0, 1024.5000000000002);

  check(32767.0, 32767.002);
  check(32766.0, 32766.998);
  check(32767.0, 32767.1);
  check(32766.0, 32766.9);
  check(32767.0, 32767.499999999996);
  check(32767.0, 32767.500000000004);

  check(6031769.0, 6031769.000000001);
  check(6031768.0, 6031768.999999999);
  check(6031769.0, 6031769.1);
  check(6031768.0, 6031768.9);
  check(6031769.0, 6031769.499999999);
  check(6031769.0, 6031769.500000001);

  check(2147483647.0, 2147483647.0000002);
  check(2147483646.0, 2147483646.9999998);
  check(2147483647.0, 2147483647.1);
  check(2147483646.0, 2147483646.9);
  check(2147483647.0, 2147483647.4999998);
  check(2147483647.0, 2147483647.5000002);

  check(4503599627370495.0, 4503599627370495.5);
}