tests/language_2/string/optimizations_test.dart

// Copyright (c) 2013, 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.

// @dart = 2.9

// Regression test for dart2js's type inferrer, that used to not
// correctly infer optional named parameters.

import "package:expect/expect.dart";
import "../compiler_annotations.dart";

@DontInline()
foo({path}) {
  () => 42;
  return path.toString();
}

@DontInline()
bar({path}) {
  () => 42;
  return path;
}

main() {
  var a = <Object>[foo(path: '42'), foo(), 42, bar(path: '54')];
  Expect.isTrue(a[1] is String);
  Expect.throwsNoSuchMethodError(() => bar().concat('54'));
}