test/int_64_vm_test.dart

// Copyright (c) 2012, 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.

@TestOn('vm')

import 'package:fixnum/fixnum.dart';
import 'package:test/test.dart';

void main() {
  group("conversions", () {
    test("toInt", () {
      expect(Int64.parseInt("-10000000000000000").toInt(),
          same(-10000000000000000));
      expect(Int64.parseInt("-10000000000000001").toInt(),
          same(-10000000000000001));
      expect(Int64.parseInt("-10000000000000002").toInt(),
          same(-10000000000000002));
      expect(Int64.parseInt("-10000000000000003").toInt(),
          same(-10000000000000003));
      expect(Int64.parseInt("-10000000000000004").toInt(),
          same(-10000000000000004));
      expect(Int64.parseInt("-10000000000000005").toInt(),
          same(-10000000000000005));
      expect(Int64.parseInt("-10000000000000006").toInt(),
          same(-10000000000000006));
      expect(Int64.parseInt("-10000000000000007").toInt(),
          same(-10000000000000007));
      expect(Int64.parseInt("-10000000000000008").toInt(),
          same(-10000000000000008));
    });
  });

  test("", () {
    check(int n) {
      // Sign change should commute with conversion.
      expect(-Int64(-n), Int64(n));
      expect(Int64(-n), -Int64(n));
    }

    check(10);
    check(1000000000000000000);
    check(9223372000000000000); // near Int64.MAX_VALUE, has exact double value
    check(9223372036854775807); // Int64.MAX_VALUE, rounds up to -MIN_VALUE
    check(-9223372036854775808); // Int64.MIN_VALUE
  });
}