capture_output.dart 542 Bytes
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// 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 'dart:async';
import 'dart:ui' show VoidCallback;

List<String> captureOutput(VoidCallback fn) {
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  final List<String> log = <String>[];
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  runZoned<void>(fn, zoneSpecification: ZoneSpecification(
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    print: (Zone self,
            ZoneDelegate parent,
            Zone zone,
            String line) {
              log.add(line);
            },
  ));

  return log;
}