tests/language_2/assert/trailing_comma_test.dart

// Copyright (c) 2017, 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.

main() {
  assert(true);
  assert(true,);
  assert(true,"message");
  assert(true,"message",);
  assert(true,"message",extra);
  //                    ^^^^^
  // [analyzer] SYNTACTIC_ERROR.UNEXPECTED_TOKEN
  // [cfe] Unexpected token 'extra'.
  assert(true,"message",,);
  //                    ^
  // [analyzer] SYNTACTIC_ERROR.UNEXPECTED_TOKEN
  // [cfe] Unexpected token ','.
}