Roll forward "Use package:stack_trace in unittest."

pkg/unittest/lib/interactive_html_config.dart

Index: pkg/unittest/lib/interactive_html_config.dart
diff --git a/pkg/unittest/lib/interactive_html_config.dart b/pkg/unittest/lib/interactive_html_config.dart
index 9d43d0988a36c07efc9fc8bac385485334f29568..b962e1e41b5c2b6eaee093c8d43ee5b469cf56b1 100644
--- a/pkg/unittest/lib/interactive_html_config.dart
+++ b/pkg/unittest/lib/interactive_html_config.dart
@@ -20,6 +20,9 @@ library unittest_interactive_html_config;
 import 'dart:html';
 import 'dart:async';
 import 'dart:math';
+
+import 'package:stack_trace/stack_trace.dart';
+
 import 'unittest.dart';
 
 /** The messages exchanged between parent and child. */
@@ -152,17 +155,25 @@ class ChildInteractiveHtmlConfiguration extends HtmlConfiguration {
   }
 
   /**
-   * Get the elapsed time for the test, anbd post the test result
-   * back to the parent window. If the test failed due to an exception
-   * the stack is posted back too (before the test result).
+   * Get the elapsed time for the test, and post the test result back to the
+   * parent window. If the test failed due to an exception the stack is posted
+   * back too (before the test result).
    */
   void onTestResult(TestCase testCase) {
     super.onTestResult(testCase);
     DateTime end = new DateTime.now();
     int elapsed = end.difference(_testStarts[testCase.id]).inMilliseconds;
     if (testCase.stackTrace != null) {
+      var message = json.stringify(testCase.stackTrace.frames.map((frame) {
+        return <String>{
+          "uri": frame.uri.toString(),
+          "line": frame.line,
+          "column": frame.column,
+          "member": frame.member
+        };
+      }).toList());
       _parentWindow.postMessage(
-          _Message.text(_Message.STACK, elapsed, testCase.stackTrace), '*');
+          _Message.text(_Message.STACK, elapsed, message), '*');
     }
     _parentWindow.postMessage(
         _Message.text(testCase.result, elapsed, testCase.message), '*');
@@ -185,7 +196,7 @@ class ParentInteractiveHtmlConfiguration extends HtmlConfiguration {
 
 
   /** The stack that was posted back from the child, if any. */
-  String _stack;
+  Trace _stack;
 
   int _testTime;
   /**
@@ -233,7 +244,13 @@ class ParentInteractiveHtmlConfiguration extends HtmlConfiguration {
     if (msg.messageType == _Message.LOG) {
       logMessage(e.data);
     } else if (msg.messageType == _Message.STACK) {
-      _stack = msg.body;
+      _stack = new Trace(json.parse(msg.body).map((frame) {
+        return new Frame(
+            Uri.parse(frame['uri']),
+            frame['line'],
+            frame['column'],
+            frame['member']);
+      }));
     } else {
       _testTime = msg.elapsed;
       logMessage(_Message.text(_Message.LOG, _testTime, 'Complete'));