Add a variant on ConsoleReporter that doesn't import dart:io.

lib/src/runner/console_reporter.dart

Index: lib/src/runner/console_reporter.dart
diff --git a/lib/src/runner/console_reporter.dart b/lib/src/runner/console_reporter.dart
deleted file mode 100644
index 4680146b2dbe922d058740e25d5f603422f13703..0000000000000000000000000000000000000000
--- a/lib/src/runner/console_reporter.dart
+++ /dev/null
@@ -1,235 +0,0 @@
-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library unittest.runner.console_reporter;
-
-import 'dart:async';
-import 'dart:io';
-
-import '../backend/live_test.dart';
-import '../backend/state.dart';
-import '../backend/suite.dart';
-import '../utils.dart';
-import 'engine.dart';
-
-/// The maximum console line length.
-///
-/// Lines longer than this will be cropped.
-const _lineLength = 100;
-
-/// A reporter that prints test results to the console in a single
-/// continuously-updating line.
-class ConsoleReporter {
-  /// The terminal escape for green text, or the empty string if this is Windows
-  /// or not outputting to a terminal.
-  final String _green;
-
-  /// The terminal escape for red text, or the empty string if this is Windows
-  /// or not outputting to a terminal.
-  final String _red;
-
-  /// The terminal escape for removing test coloring, or the empty string if
-  /// this is Windows or not outputting to a terminal.
-  final String _noColor;
-
-  /// The engine used to run the tests.
-  final Engine _engine;
-
-  /// Whether multiple test suites are being run.
-  final bool _multipleSuites;
-
-  /// A stopwatch that tracks the duration of the full run.
-  final _stopwatch = new Stopwatch();
-
-  /// The set of tests that have completed and been marked as passing.
-  final _passed = new Set<LiveTest>();
-
-  /// The set of tests that have completed and been marked as failing or error.
-  final _failed = new Set<LiveTest>();
-
-  /// The size of [_passed] last time a progress notification was printed.
-  int _lastProgressPassed;
-
-  /// The size of [_failed] last time a progress notification was printed.
-  int _lastProgressFailed;
-
-  /// The message printed for the last progress notification.
-  String _lastProgressMessage;
-
-  /// Creates a [ConsoleReporter] that will run all tests in [suites].
-  ///
-  /// If [color] is `true`, this will use terminal colors; if it's `false`, it
-  /// won't.
-  ConsoleReporter(Iterable<Suite> suites, {bool color: true})
-      : _multipleSuites = suites.length > 1,
-        _engine = new Engine(suites),
-        _green = color ? '\u001b[32m' : '',
-        _red = color ? '\u001b[31m' : '',
-        _noColor = color ? '\u001b[0m' : '' {
-    _engine.onTestStarted.listen((liveTest) {
-      _progressLine(_description(liveTest));
-      liveTest.onStateChange.listen((state) {
-        if (state.status != Status.complete) return;
-        if (state.result == Result.success) {
-          _passed.add(liveTest);
-        } else {
-          _passed.remove(liveTest);
-          _failed.add(liveTest);
-        }
-        _progressLine(_description(liveTest));
-      });
-
-      liveTest.onError.listen((error) {
-        if (liveTest.state.status != Status.complete) return;
-
-        _progressLine(_description(liveTest));
-        print('');
-        print(indent(error.error.toString()));
-        print(indent(terseChain(error.stackTrace).toString()));
-      });
-    });
-  }
-
-  /// Runs all tests in all provided suites.
-  ///
-  /// This returns `true` if all tests succeed, and `false` otherwise. It will
-  /// only return once all tests have finished running.
-  Future<bool> run() {
-    if (_stopwatch.isRunning) {
-      throw new StateError("ConsoleReporter.run() may not be called more than "
-          "once.");
-    }
-
-    if (_engine.liveTests.isEmpty) {
-      print("No tests ran.");
-      return new Future.value(true);
-    }
-
-    _stopwatch.start();
-    return _engine.run().then((success) {
-      if (success) {
-        _progressLine("All tests passed!");
-        print('');
-      } else {
-        _progressLine('Some tests failed.', color: _red);
-        print('');
-      }
-
-      return success;
-    });
-  }
-
-  /// Signals that the caller is done with any test output and the reporter
-  /// should release any resources it has allocated.
-  Future close() => _engine.close();
-
-  /// Prints a line representing the current state of the tests.
-  ///
-  /// [message] goes after the progress report, and may be truncated to fit the
-  /// entire line within [_lineLength]. If [color] is passed, it's used as the
-  /// color for [message].
-  void _progressLine(String message, {String color}) {
-    // Print nothing if nothing has changed since the last progress line.
-    if (_passed.length == _lastProgressPassed &&
-        _failed.length == _lastProgressFailed &&
-        message == _lastProgressMessage) {
-      return;
-    }
-
-    _lastProgressPassed = _passed.length;
-    _lastProgressFailed = _failed.length;
-    _lastProgressMessage = message;
-
-    if (color == null) color = '';
-    var duration = _stopwatch.elapsed;
-    var buffer = new StringBuffer();
-
-    // \r moves back to the beginning of the current line.
-    buffer.write('\r${_timeString(duration)} ');
-    buffer.write(_green);
-    buffer.write('+');
-    buffer.write(_passed.length);
-    buffer.write(_noColor);
-
-    if (_failed.isNotEmpty) {
-      buffer.write(_red);
-      buffer.write(' -');
-      buffer.write(_failed.length);
-      buffer.write(_noColor);
-    }
-
-    buffer.write(': ');
-    buffer.write(color);
-
-    // Ensure the line fits within [_lineLength]. [buffer] includes the color
-    // escape sequences too. Because these sequences are not visible characters,
-    // we make sure they are not counted towards the limit.
-    var nonVisible = 1 + _green.length + _noColor.length + color.length +
-        (_failed.isEmpty ? 0 : _red.length + _noColor.length);
-    var length = buffer.length - nonVisible;
-    buffer.write(_truncate(message, _lineLength - length));
-    buffer.write(_noColor);
-
-    // Pad the rest of the line so that it looks erased.
-    length = buffer.length - nonVisible - _noColor.length;
-    buffer.write(' ' * (_lineLength - length));
-    stdout.write(buffer.toString());
-  }
-
-  /// Returns a representation of [duration] as `MM:SS`.
-  String _timeString(Duration duration) {
-    return "${duration.inMinutes.toString().padLeft(2, '0')}:"
-        "${(duration.inSeconds % 60).toString().padLeft(2, '0')}";
-  }
-
-  /// Truncates [text] to fit within [maxLength].
-  ///
-  /// This will try to truncate along word boundaries and preserve words both at
-  /// the beginning and the end of [text].
-  String _truncate(String text, int maxLength) {
-    // Return the full message if it fits.
-    if (text.length <= maxLength) return text;
-
-    // If we can fit the first and last three words, do so.
-    var words = text.split(' ');
-    if (words.length > 1) {
-      var i = words.length;
-      var length = words.first.length + 4;
-      do {
-        i--;
-        length += 1 + words[i].length;
-      } while (length <= maxLength && i > 0);
-      if (length > maxLength || i == 0) i++;
-      if (i < words.length - 4) {
-        // Require at least 3 words at the end.
-        var buffer = new StringBuffer();
-        buffer.write(words.first);
-        buffer.write(' ...');
-        for ( ; i < words.length; i++) {
-          buffer.write(' ');
-          buffer.write(words[i]);
-        }
-        return buffer.toString();
-      }
-    }
-
-    // Otherwise truncate to return the trailing text, but attempt to start at
-    // the beginning of a word.
-    var result = text.substring(text.length - maxLength + 4);
-    var firstSpace = result.indexOf(' ');
-    if (firstSpace > 0) {
-      result = result.substring(firstSpace);
-    }
-    return '...$result';
-  }
-
-  /// Returns a description of [liveTest].
-  ///
-  /// This differs from the test's own description in that it may also include
-  /// the suite's name.
-  String _description(LiveTest liveTest) {
-    if (_multipleSuites) return "${liveTest.suite.name}: ${liveTest.test.name}";
-    return liveTest.test.name;
-  }
-}