Add a LoadSuite class.

lib/src/utils.dart

 // Copyright (c) 2013, 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 test.utils;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:math' as math;
 
@@ skipping 65 matching lines @@
 ///
 /// Many exceptions include the exception class name at the beginning of their
 /// [toString], so we remove that if it exists.
 String getErrorMessage(error) =>
   error.toString().replaceFirst(_exceptionPrefix, '');
 
 /// Indent each line in [str] by two spaces.
 String indent(String str) =>
     str.replaceAll(new RegExp("^", multiLine: true), "  ");
 
+/// A regular expression matching terminal color codes.
+final _colorCode = new RegExp('\u001b\\[[0-9;]+m');
+
+/// Returns [str] without any color codes.
+String withoutColors(String str) => str.replaceAll(_colorCode, '');
+
 /// A regular expression matching the path to a temporary file used to start an
 /// isolate.
 ///
 /// These paths aren't relevant and are removed from stack traces.
 final _isolatePath =
     new RegExp(r"/test_[A-Za-z0-9]{6}/runInIsolate\.dart$");
 
 /// Returns [stackTrace] converted to a [Chain] with all irrelevant frames
 /// folded together.
 ///
@@ skipping 243 matching lines @@
   }
 }
 
 /// Returns middleware that nests all requests beneath the URL prefix [beneath].
 shelf.Middleware nestingMiddleware(String beneath) {
   return (handler) {
     var pathHandler = new PathHandler()..add(beneath, handler);
     return pathHandler.handler;
   };
 }