import 'dart:async'; import 'package:flutter/services.dart'; import 'package:flutter_test/flutter_test.dart'; import 'package:system_proxy/system_proxy.dart'; void main() { const MethodChannel channel = MethodChannel('system_proxy'); setUp(() { channel.setMockMethodCallHandler((MethodCall methodCall) async { return {'host': '127.0.0.1', 'port': '8899'}; }); }); tearDown(() { channel.setMockMethodCallHandler(null); }); test('getProxySettings', () async { Map proxy = await (SystemProxy.getProxySettings() as FutureOr>); expect(proxy['host'], '127.0.0.1'); expect(proxy['port'], '8899'); }); }