TBR: Revrt r21819 until I can figure out why ity is breaking the scheduled_test package.

pkg/scheduled_test/test/scheduled_test/set_up_test.dart

Index: pkg/scheduled_test/test/scheduled_test/set_up_test.dart
===================================================================
--- pkg/scheduled_test/test/scheduled_test/set_up_test.dart	(revision 21825)
+++ pkg/scheduled_test/test/scheduled_test/set_up_test.dart	(working copy)
@@ -79,6 +79,46 @@
     test('test 2', () => expect(onExceptionRun, isTrue));
   }, passing: ['test 2']);
 
+  expectTestsPass("setUp doesn't apply to child groups", () {
+    var setUpRun = false;
+    setUp(() {
+      setUpRun = true;
+      currentSchedule.onComplete.schedule(() {
+        setUpRun = false;
+      });
+    });
+
+    test('outer', () {
+      expect(setUpRun, isTrue);
+    });
+
+    group('group', () {
+      test('inner', () {
+        expect(setUpRun, isFalse);
+      });
+    });
+  });
+
+  expectTestsPass("setUp doesn't apply to parent groups", () {
+    var setUpRun = false;
+    group('group', () {
+      setUp(() {
+        setUpRun = true;
+        currentSchedule.onComplete.schedule(() {
+          setUpRun = false;
+        });
+      });
+
+      test('inner', () {
+        expect(setUpRun, isTrue);
+      });
+    });
+
+    test('outer', () {
+      expect(setUpRun, isFalse);
+    });
+  });
+
   expectTestsPass("setUp doesn't apply to sibling groups", () {
     var setUpRun = false;
     group('group 1', () {
@@ -100,4 +140,4 @@
       });
     });
   });
-}
+}