tests/web/wasm/masquerade_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.

import 'dart:typed_data';
import 'dart:js_interop';

import 'package:expect/expect.dart';

const bool isJsCompatibility = bool.fromEnvironment(
  'dart.wasm.js_compatibility',
);

void main() {
  final uint8List = Uint8List(10);
  final uint8ListView = uint8List.buffer.asUint8List(1, 2);
  final uint16ListView = uint8List.buffer.asUint16List(2, 4);

  Expect.equals(Uint8List, uint8List.runtimeType);
  Expect.equals(Uint8List, uint8ListView.runtimeType);
  Expect.equals(Uint16List, uint16ListView.runtimeType);

  final jsString = eval('"foobar"').dartify();
  final jsTypedData = eval('new Uint8Array(10)').dartify();

  Expect.equals(String, jsString.runtimeType);

  if (isJsCompatibility) {
    Expect.equals(Uint8List, jsTypedData.runtimeType);
  } else {
    // JSUint8ArrayImpl
    Expect.notEquals(Uint8List, jsTypedData.runtimeType);
  }
}

@JS()
external JSObject eval(String code);