Added --failure-summary option to test.dart

tools/testing/dart/test_progress.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_progress;
 
 import "dart:io";
 import "dart:io" as io;
 import "http_server.dart" as http_server;
 import "status_file_parser.dart";
@@ skipping 296 matching lines @@
   void done(TestCase test) {
     var status = 'pass';
     if (test.lastCommandOutput.unexpectedOutput) {
       status = 'fail';
     }
     print('Done ${test.configurationString} ${test.displayName}: $status');
   }
 }
 
 class TestFailurePrinter extends EventListener {
+  bool _printSummary;
   var _formatter;
+  var _failureSummary = <String>[];
 
-  TestFailurePrinter([this._formatter = const Formatter()]);
+  TestFailurePrinter(this._printSummary,
+                     [this._formatter = const Formatter()]);
 
   void done(TestCase test) {
     if (test.lastCommandOutput.unexpectedOutput) {
-      for (var line in _buildFailureOutput(test, _formatter)) {
+      var lines = _buildFailureOutput(test, _formatter);
+      for (var line in lines) {
         print(line);
       }
       print('');
+      if (_printSummary) {
+        _failureSummary.addAll(lines);
+        _failureSummary.add('');
+      }
+    }
+  }
+
+  void allDone() {
+    if (_printSummary) {
+      print('\n=== Failure summary:\n');
+      if (!_failureSummary.isEmpty) {
+        for (String line in _failureSummary) {
+          print(line);
+        }
+        print('');
+      }
     }
   }
 }
 
 class ProgressIndicator extends EventListener {
   ProgressIndicator(this._startTime);
 
   factory ProgressIndicator.fromName(String name,
                                      DateTime startTime,
                                      Formatter formatter) {
@@ skipping 62 matching lines @@
   int _failedTests = 0;
   bool _allTestsKnown = false;
   DateTime _startTime;
 }
 
 abstract class CompactIndicator extends ProgressIndicator {
   CompactIndicator(DateTime startTime)
       : super(startTime);
 
   void allDone() {
-    stdout.writeln('');
     if (_failedTests > 0) {
       // We may have printed many failure logs, so reprint the summary data.
       _printProgress();
       print('');
     }
     stdout.close();
     stderr.close();
   }
 
   void _printStartProgress(TestCase test) => _printProgress();
@@ skipping 71 matching lines @@
       print('@@@STEP_FAILURE@@@');
       print('@@@BUILD_STEP $stepName failures@@@');
       for (String line in _failureSummary) {
         print(line);
       }
       print('');
     }
     super.allDone();
   }
 }