// Copyright 2014 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. import 'package:flutter/foundation.dart'; import 'package:flutter_test/flutter_test.dart'; void main() { group('debugInstrumentAction', () { late DebugPrintCallback originalDebugPrintCallback; late StringBuffer printBuffer; setUp(() { debugInstrumentationEnabled = true; printBuffer = StringBuffer(); originalDebugPrintCallback = debugPrint; debugPrint = (String? message, { int? wrapWidth }) { printBuffer.writeln(message); }; }); tearDown(() { debugInstrumentationEnabled = false; debugPrint = originalDebugPrintCallback; }); test('works with non-failing actions', () async { final int result = await debugInstrumentAction<int>('no-op', () async { debugPrint('action()'); return 1; }); expect(result, 1); expect( printBuffer.toString(), matches(RegExp('^action\\(\\)\nAction "no-op" took .+\$', multiLine: true)), ); }); test('returns failing future if action throws', () async { await expectLater( () => debugInstrumentAction<void>('throws', () async { await Future<void>.delayed(Duration.zero); throw 'Error'; }), throwsA('Error'), ); expect(printBuffer.toString(), matches(r'^Action "throws" took .+')); }); }); }