Small tweaks to hot reload testing

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,
@@ skipping 282 matching lines @@
     int shards = configuration['shards'];
     if (shards > 1 && testCase.hash % shards != configuration['shard'] - 1) {
       return;
     }
     // Test if the selector includes this test.
     RegExp pattern = configuration['selectors'][suiteName];
     if (!pattern.hasMatch(testCase.displayName)) {
       return;
     }
 
+    if (configuration['hot_reload']) {
+      // Handle reload special cases.
+      if (expectations.contains(Expectation.COMPILETIME_ERROR)) {
+        // Skip reloading tests with expected compilation errors.
+        return;
+      }
+    }
+
     // Update Summary report
     if (configuration['report']) {
       if (testCase.expectCompileError &&
           TestUtils.isBrowserRuntime(configuration['runtime']) &&
           new CompilerConfiguration(configuration).hasCompiler) {
         summaryReport.addCompileErrorSkipTest();
         return;
       } else {
         summaryReport.add(testCase);
       }
@@ skipping 2157 matching lines @@
       }
       if (path.length > WINDOWS_SHORTEN_PATH_LIMIT) {
         ++shortNameCounter;
         var pathEnd = path.substring(path.length - WINDOWS_PATH_END_LENGTH);
         path = "short${shortNameCounter}_$pathEnd";
       }
     }
     return path;
   }
 }