tests/web/extension_type_assert_error_test.dart

// Copyright (c) 2024, 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.

// dart2jsOptions=--enable-asserts

import "package:expect/expect.dart";

const String? maybe = bool.fromEnvironment("not there") ? "string" : null;

extension type const Ext._(String _) implements String {
  const Ext()
      : assert(maybe != null, "Must not be null"),
        _ = "OK";
}

void main() {
  const Ext();
  //    ^
  // [cfe] Constant evaluation error:
}