pkg/front_end/testcases/extension_types/issue52284.dart

// Copyright (c) 2023, 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.

extension type Id(int id) {}

test() {
  var c = Id(2);
  print(c.unresolved); // Error
}

main() {
  var c = Id(2);
  expect(int, c.runtimeType);
}

expect(expected, actual) {
  if (expected != actual) throw 'Expected $expected, actual $actual';
}