tests/language_2/int64_literal_test.dart

import 'package:expect/expect.dart';

const String realMaxInt64Value = '9223372036854775807';
const String realMinInt64Value = '-9223372036854775808';

const int i21 = 2097152;

main() {
  int minInt64Value = -1 * i21 * i21 * i21;
  minInt64Value = -9223372036854775807 - 1; /// 01: ok
  minInt64Value = -9223372036854775808;     /// 02: ok
  minInt64Value = -(9223372036854775808);   /// 03: compile-time error
  minInt64Value = -(0x8000000000000000);    /// 04: ok
  minInt64Value = 0x8000000000000000;       /// 05: ok
  minInt64Value = -0x8000000000000000;      /// 06: ok

  Expect.equals('$minInt64Value', realMinInt64Value);
  Expect.equals('${minInt64Value - 1}', realMaxInt64Value);

  int maxInt64Value = 1 * i21 * i21 * i21 - 1;
  maxInt64Value = 9223372036854775807;      /// 11: ok
  maxInt64Value = 9223372036854775807;      /// 12: ok
  maxInt64Value = 9223372036854775808 - 1;  /// 13: compile-time error
  maxInt64Value = -9223372036854775808 - 1; /// 14: ok
  maxInt64Value = -9223372036854775809;     /// 15: compile-time error
  maxInt64Value = 0x8000000000000000 - 1;   /// 16: ok
  maxInt64Value = -0x8000000000000000 - 1;  /// 17: ok
  maxInt64Value = -0x8000000000000001;      /// 18: compile-time error
  maxInt64Value = -(0x8000000000000001);    /// 19: ok

  Expect.equals('$maxInt64Value', realMaxInt64Value);
  Expect.equals('${maxInt64Value + 1}', realMinInt64Value);
}