tests/language/type_object/runtime_type_function_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.

import "package:expect/expect.dart";

import "runtime_type_function_helper.dart";

main() {
  // Types that do not use class names - these can be checked on dart2js in
  // minified mode.

  check(fn('dynamic', ''), main); //        Top-level tear-off.
  check(fn('void', ''), Xyzzy.foo); //      Class static member tear-off.
  check(fn('void', 'Object?'), new MyList().add); //  Instance tear-off.
  check(fn('int', ''), () => 1); //       closure.

  var s = new Xyzzy().runtimeType.toString();
  if (s.length <= 3) return; // dart2js --minify has minified names.

  Expect.equals('Xyzzy', s, 'runtime type of plain class prints as class name');

  check(fn('void', 'String, dynamic'), check);

  // Class static member tear-offs.
  check(fn('String', 'String, [String?, dynamic]'), Xyzzy.opt);
  check(fn('String', 'String', {'a': 'String?', 'b': 'dynamic'}), Xyzzy.nam);

  // Instance method tear-offs.
  check(fn('void', 'Object?'), new MyList<String>().add);
  check(fn('void', 'Object?'), new MyList<int>().add);
  check(fn('void', 'int'), new Xyzzy().intAdd);

  check(fn('String', 'Object?'), new G<String, int>().foo);

  // Instance method with function parameter.
  var string2int = fn('int', 'String');
  check(fn('String', 'Object?'), new G<String, int>().moo);
  check(fn('String', '$string2int'), new G<String, int>().higherOrder);

  // Closures.
  String localFunc(String a, String b, [Map<String, String>? named]) => a + b;
  void localFunc2(int a) {
    print(a);
  }

  Expect.isTrue(localFunc is F);
  check(fn('String', 'String, String, [Map<String, String>?]'), localFunc);
  check(fn('void', 'int'), localFunc2);
}

class Xyzzy {
  static void foo() {}
  static String opt(String x, [String? a, b]) => "";
  static String nam(String x, {String? a, b}) => "";
  void intAdd(int x) {}
}

class MyList<E> {
  void add(E value) {}
}

class G<U, V> {
  U foo(V x) => throw "uncalled";
  U moo(V f(U x)) => throw "uncalled";
  U higherOrder(int f(U x)) => throw "uncalled";
}