Fix a bug with skipped groups.

test/runner/expanded_reporter_test.dart

Index: test/runner/expanded_reporter_test.dart
diff --git a/test/runner/expanded_reporter_test.dart b/test/runner/expanded_reporter_test.dart
index 11eac9fdb7c6840e3b376ed2a933d4b4bfd101a8..188bc7f0210f891dba6174bc4553a2d857e92efa 100644
--- a/test/runner/expanded_reporter_test.dart
+++ b/test/runner/expanded_reporter_test.dart
@@ -251,6 +251,18 @@ void main() {
           +0 ~3: All tests skipped.""");
     });
 
+    test("displays a skipped group", () {
+      _expectReport("""
+          group('skip', () {
+            test('test 1', () {});
+            test('test 2', () {});
+            test('test 3', () {});
+          }, skip: true);""",
+          """
+          +0: skip
+          +0 ~1: All tests skipped.""");
+    });
+
     test("runs skipped tests along with successful tests", () {
       _expectReport("""
           test('skip 1', () {}, skip: true);