tools/testing: move code into individual libraries

tools/testing/dart/test_suite.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
  *   and creating [TestCase]s for those files that meet the relevant criteria.
  * - Preparing tests, including copying files and frameworks to temporary
  *   directories, and computing the command line and arguments to be run.
  */
 library test_suite;
 
 import "dart:async";
 import "dart:io";
 import "drt_updater.dart";
 import "html_test.dart" as htmlTest;
+import "path.dart";
 import "multitest.dart";
 import "status_file_parser.dart";
 import "test_runner.dart";
 import "utils.dart";
 import "http_server.dart" show PREFIX_BUILDDIR, PREFIX_DARTDIR;
 
 import "compiler_configuration.dart" show
     CommandArtifact,
     CompilerConfiguration;
 
 import "runtime_configuration.dart" show
     RuntimeConfiguration;
 
-part "browser_test.dart";
+import 'browser_test.dart';
 
 
 RegExp multiHtmlTestGroupRegExp = new RegExp(r"\s*[^/]\s*group\('[^,']*");
 RegExp multiHtmlTestRegExp = new RegExp(r"useHtmlIndividualConfiguration()");
 // Require at least one non-space character before '///'
 RegExp multiTestRegExp = new RegExp(r"\S *"
                                     r"/// \w+:(.*)");
 RegExp dartExtension = new RegExp(r'\.dart$');
 
 /**
@@ skipping 2424 matching lines @@
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
  * $compileErrorSkip tests are skipped on browsers due to compile-time error
 """;
     print(report);
   }
 }