LibTest/js_interop/JSAnyUtilityExtension/dartify_A02_t02.dart

// Copyright (c) 2025, 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.

/// @assertion Object? dartify()
/// Converts a JavaScript JSON-like value to the Dart equivalent if possible.
///
/// Effectively the inverse of [NullableObjectUtilExtension.jsify], [dartify]
/// takes a JavaScript JSON-like value and recursively converts it to a Dart
/// object, doing the following:
/// - If the value is a string, number, boolean, `null`, `undefined`,
///   `DataView` or a typed array, does the equivalent `toDart` operation if
///   it exists and returns the result.
/// - If the value is a simple JS object (the prototype is either `null` or JS
///   `Object`), creates and returns a `[Map]<Object?, Object?>` whose keys
///   are the recursively converted keys obtained from `Object.keys` and its
///   values are the associated values of the keys in the JS object.
/// - If the value is a JS `Array`, each item in it is recursively converted
///   and added to a new `[List]<Object?>`, which is then returned.
/// - Otherwise, the conversion is undefined.
///
/// @description Checks that `dartify()` converts a simple JS object to a
/// `[Map]<Object?, Object?>` whose keys are the recursively converted keys
/// obtained from `Object.keys` and its values are the associated values of the
/// keys in the JS object.
/// @author sgrekhov22@gmail.com

import 'dart:js_interop';
import 'dart:js_interop_unsafe';
import '../../../Utils/expect.dart';
import '../js_utils.dart';

main() {
  eval(r'''
    globalThis.obj = {
      id: 42,
      name: "JS Object",
      sub: {
        id: 0,
        name: "Check recursion",
        data: [true, false]
      }
    };
  ''');
  var dartObj = globalContext["obj"].dartify();
  Expect.isTrue(dartObj is Map<Object?, Object?>);
  Expect.mapEquals({
    "id": 42,
    "name": "JS Object",
    "sub": {
      "id": 0,
      "name": "Check recursion",
      "data": [true, false],
    },
  }, dartObj);
}