"Reverting 20457"

pkg/unittest/lib/html_individual_config.dart

Index: pkg/unittest/lib/html_individual_config.dart
diff --git a/pkg/unittest/lib/html_individual_config.dart b/pkg/unittest/lib/html_individual_config.dart
index 7a52242026c1dff65b8902ad39f79703809e5dae..39a9d0ef8d4176e474fe016957b66425a06f00ed 100644
--- a/pkg/unittest/lib/html_individual_config.dart
+++ b/pkg/unittest/lib/html_individual_config.dart
@@ -19,28 +19,23 @@ import 'unittest.dart' as unittest;
 import 'html_config.dart' as htmlconfig;
 
 class HtmlIndividualConfiguration extends htmlconfig.HtmlConfiguration {
-  HtmlIndividualConfiguration(bool isLayoutTest): super(isLayoutTest);
+
+  String _noSuchTest = '';
+  HtmlIndividualConfiguration(isLayoutTest): super(isLayoutTest);
 
   void onStart() {
     var search = window.location.search;
     if (search != '') {
-      var groups = search.substring(1).split('&')
-          .where((p) => p.startsWith('group='))
-          .toList();
-
-      if(!groups.isEmpty) {
-        if(groups.length > 1) {
-          throw 'More than one "group" parameter provided.';
-        }
-
-        var testGroupName = groups.single.split('=')[1];
-        var startsWith = "$testGroupName${unittest.groupSep}";
-        unittest.filterTests((unittest.TestCase tc) =>
-            tc.description.startsWith(startsWith));
-
-        if(unittest.testCases.isEmpty) {
-          throw 'No tests match group "$testGroupName".';
+      try {
+        for (var parameter in search.substring(1).split('&')) {
+          if (parameter.startsWith('group=')) {
+            var testGroupName = parameter.split('=')[1];
+            unittest.filterTests('^$testGroupName${unittest.groupSep}');
+          }
         }
+      } catch (e) {
+        print('tried to match "$testGroupName"');
+        print('NO_SUCH_TEST');
       }
     }
     super.onStart();