// Copyright 2017 The Chromium 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', () { DebugPrintCallback originalDebugPrintCallback; 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 { try { await debugInstrumentAction<void>('throws', () async { await Future<void>.delayed(Duration.zero); throw 'Error'; }); fail('Error expected but not thrown'); } on String catch (error) { expect(error, 'Error'); expect(printBuffer.toString(), matches(r'^Action "throws" took .+')); } }); }); }