Brian Wilkerson
47e988b781
Change-Id: Iee3110f92ab0f24312ddd1eff407d2229f895321 Reviewed-on: https://dart-review.googlesource.com/c/89101 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
50 lines
1.3 KiB
Dart
50 lines
1.3 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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/**
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* A utility class used to write logging information during a test.
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*/
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class Logger {
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/**
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* The width of the field in which labels are printed.
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*/
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static const int _labelWidth = 8;
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/**
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* The separator used to separate the label from the content.
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*/
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static const String _separator = ' : ';
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/**
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* The sink to which the logged information should be written.
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*/
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final StringSink sink;
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/**
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* Initialize a newly created logger to write to the given [sink].
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*/
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Logger(this.sink);
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/**
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* Log the given information.
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*
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* The [label] is used to indicate the kind of information being logged, while
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* the [content] contains the actual information. If a list of [arguments] is
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* provided, then they will be written after the content.
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*/
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void log(String label, String content, {List<String> arguments = null}) {
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for (int i = _labelWidth - label.length; i > 0; i--) {
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sink.write(' ');
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}
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sink.write(label);
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sink.write(_separator);
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sink.write(content);
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arguments?.forEach((String argument) {
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sink.write(' ');
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sink.write(argument);
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});
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sink.writeln();
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}
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}
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