| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // @dart = 2.6 |
| import 'dart:ui'; |
| |
| import 'package:test/test.dart'; |
| |
| String top() => 'top'; |
| |
| class Foo { |
| const Foo(); |
| static int getInt() => 1; |
| double getDouble() => 1.0; |
| } |
| |
| const Foo foo = Foo(); |
| |
| void main() { |
| test('PluginUtilities Callback Handles', () { |
| // Top level callback. |
| final CallbackHandle hTop = PluginUtilities.getCallbackHandle(top); |
| expect(hTop, isNotNull); |
| expect(hTop, isNot(0)); |
| expect(PluginUtilities.getCallbackHandle(top), hTop); |
| final Function topClosure = PluginUtilities.getCallbackFromHandle(hTop); |
| expect(topClosure, isNotNull); |
| expect(topClosure(), 'top'); |
| |
| // Static method callback. |
| final CallbackHandle hGetInt = PluginUtilities.getCallbackHandle(Foo.getInt); |
| expect(hGetInt, isNotNull); |
| expect(hGetInt, isNot(0)); |
| expect(PluginUtilities.getCallbackHandle(Foo.getInt), hGetInt); |
| final Function getIntClosure = PluginUtilities.getCallbackFromHandle(hGetInt); |
| expect(getIntClosure, isNotNull); |
| expect(getIntClosure(), 1); |
| |
| // Instance method callbacks cannot be looked up. |
| const Foo foo = Foo(); |
| expect(PluginUtilities.getCallbackHandle(foo.getDouble), isNull); |
| |
| // Anonymous closures cannot be looked up. |
| final Function anon = (int a, int b) => a + b; |
| expect(PluginUtilities.getCallbackHandle(anon), isNull); |
| }); |
| } |