Add JSON protocol support for groups.

lib/src/backend/live_test.dart

Index: lib/src/backend/live_test.dart
diff --git a/lib/src/backend/live_test.dart b/lib/src/backend/live_test.dart
index 4cc917a5a4af3efb1dbcd30c8b87256600c23484..00b0d11cf2a748bac3dac79410b59be89de4d114 100644
--- a/lib/src/backend/live_test.dart
+++ b/lib/src/backend/live_test.dart
@@ -6,6 +6,7 @@ library test.backend.live_test;
 
 import 'dart:async';
 
+import 'group.dart';
 import 'state.dart';
 import 'suite.dart';
 import 'test.dart';
@@ -26,6 +27,12 @@ abstract class LiveTest {
   /// The suite within which this test is being run.
   Suite get suite;
 
+  /// The groups within which this test is being run, from the outermost to the
+  /// innermost.
+  ///
+  /// This will always contain at least the implicit top-level group.
+  List<Group> get groups;
+
   /// The running test.
   Test get test;
 
@@ -95,6 +102,19 @@ abstract class LiveTest {
   /// to happen, which may cause further errors.
   Future get onComplete;
 
+  /// The name of this live test without any group prefixes.
+  String get individualName {
+    var group = groups.last;
+    if (group.name == null) return test.name;
+    if (!test.name.startsWith(group.name)) return test.name;
+
+    // The test will have the same name as the group for virtual tests created
+    // to represent skipping the entire group.
+    if (test.name.length == group.name.length) return "";
+
+    return test.name.substring(group.name.length + 1);
+  }
+
   /// Signals that this test should start running as soon as possible.
   ///
   /// A test may not start running immediately for various reasons specific to