Add a LoadSuite class.

test/runner/pub_serve_test.dart

 // 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.
 
 @TestOn("vm")
 
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:test/src/util/exit_codes.dart' as exit_codes;
@@ skipping 117 matching lines @@
 
     test("gracefully handles pub serve running on the wrong directory for "
         "VM tests", () async {
       new Directory(p.join(_sandbox, "web")).createSync();
 
       var pair = await startPubServe(args: ['web'], workingDirectory: _sandbox);
       try {
         var result = runTest(['--pub-serve=${pair.last}'],
             workingDirectory: _sandbox);
         expect(result.stdout, allOf([
-          contains('-1: ${p.join("test", "my_test.dart")}: load error'),
+          contains('-1: loading ${p.join("test", "my_test.dart")}'),
           contains('Failed to load "${p.join("test", "my_test.dart")}":'),
           contains('404 Not Found'),
           contains('Make sure "pub serve" is serving the test/ directory.')
         ]));
         expect(result.exitCode, equals(1));
       } finally {
         pair.first.kill();
       }
     });
 
     test("gracefully handles pub serve running on the wrong directory for "
         "browser tests", () async {
       new Directory(p.join(_sandbox, "web")).createSync();
 
       var pair = await startPubServe(args: ['web'], workingDirectory: _sandbox);
       try {
         var result = runTest(['--pub-serve=${pair.last}', '-p', 'chrome'],
             workingDirectory: _sandbox);
         expect(result.stdout, allOf([
-          contains('-1: ${p.join("test", "my_test.dart")}: load error'),
+          contains('-1: compiling ${p.join("test", "my_test.dart")}'),
           contains('Failed to load "${p.join("test", "my_test.dart")}":'),
           contains('404 Not Found'),
           contains('Make sure "pub serve" is serving the test/ directory.')
         ]));
         expect(result.exitCode, equals(1));
       } finally {
         pair.first.kill();
       }
     });
 
@@ skipping 124 matching lines @@
       } finally {
         pair.first.kill();
       }
     });
   });
 
   test("gracefully handles pub serve not running for VM tests", () {
     var result = runTest(['--pub-serve=54321'],
         workingDirectory: _sandbox);
     expect(result.stdout, allOf([
-      contains('-1: ${p.join("test", "my_test.dart")}: load error'),
+      contains('-1: loading ${p.join("test", "my_test.dart")}'),
       contains('''
   Failed to load "${p.join("test", "my_test.dart")}":
   Error getting http://localhost:54321/my_test.dart.vm_test.dart: Connection refused
   Make sure "pub serve" is running.''')
     ]));
     expect(result.exitCode, equals(1));
   });
 
   test("gracefully handles pub serve not running for browser tests", () {
     var result = runTest(['--pub-serve=54321', '-p', 'chrome'],
         workingDirectory: _sandbox);
     var message = Platform.isWindows
         ? 'The remote computer refused the network connection.'
         : 'Connection refused (errno ';
 
     expect(result.stdout, allOf([
-      contains('-1: ${p.join("test", "my_test.dart")}: load error'),
+      contains('-1: compiling ${p.join("test", "my_test.dart")}'),
       contains('Failed to load "${p.join("test", "my_test.dart")}":'),
       contains('Error getting http://localhost:54321/my_test.dart.browser_test'
           '.dart.js.map: $message'),
       contains('Make sure "pub serve" is running.')
     ]));
     expect(result.exitCode, equals(1));
   });
 
   test("gracefully handles a test file not being in test/", () {
     new File(p.join(_sandbox, 'test/my_test.dart'))
         .copySync(p.join(_sandbox, 'my_test.dart'));
 
     var result = runTest(['--pub-serve=54321', 'my_test.dart'],
         workingDirectory: _sandbox);
     expect(result.stdout, allOf([
-      contains('-1: load error'),
+      contains('-1: loading my_test.dart'),
       contains(
           'Failed to load "my_test.dart": When using "pub serve", all test '
               'files must be in test/.\n')
     ]));
     expect(result.exitCode, equals(1));
   });
 }