flutter/examples/api/test/widgets/sliver
yim 7b262d926d
Test SliverMainAxisGroup offstage child (#159406)
```dart
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('my test', (WidgetTester tester) async {
    await tester.pumpWidget(
      MaterialApp(
        home: LayoutBuilder(
          builder: (context, view) {
            return CustomScrollView(
              slivers: [
                SliverMainAxisGroup(
                  slivers: [
                    SliverToBoxAdapter(child: SizedBox(height: view.maxHeight)),
                    const SliverToBoxAdapter(child: Text('1')),
                  ],
                )
              ],
            );
          },
        ),
      ),
    );
    expect(find.text('1'), findsNothing);
  });
}
```
The above test should have passed, but it failed. This PR fixes the
issue.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [ ] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
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[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
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[Features we expect every widget to implement]:
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[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
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[Data Driven Fixes]:
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2024-12-11 00:58:59 +00:00
..
decorated_sliver.0_test.dart Fix DecoratedSliver sample code to reflect the description (#148621) 2024-05-23 08:52:15 +00:00
decorated_sliver.1_test.dart Updated document to clarify Clip Behaviour (#157719) 2024-11-14 20:21:09 +00:00
pinned_header_sliver.0_test.dart PinnedHeaderSliver (#143196) 2024-06-07 21:27:06 +00:00
pinned_header_sliver.1_test.dart PinnedHeaderSliver example based on the iOS Settings AppBar (#151205) 2024-07-03 20:06:16 +00:00
sliver_constrained_cross_axis.0_test.dart Sliver Constrained Cross Axis (#125239) 2023-04-24 23:17:36 +00:00
sliver_cross_axis_group.0_test.dart Sliver Cross Axis Group (#123862) 2023-04-28 23:41:58 +00:00
sliver_floating_header.0_test.dart SliverFloatingHeader (#151145) 2024-07-03 19:52:52 +00:00
sliver_main_axis_group.0_test.dart Test SliverMainAxisGroup offstage child (#159406) 2024-12-11 00:58:59 +00:00
sliver_opacity.1_test.dart Rename Sample classes (#124080) 2023-04-04 20:34:29 +00:00
sliver_resizing_header.0_test.dart SliverResizingHeader (#143325) 2024-06-06 22:35:12 +00:00
sliver_tree.0_test.dart Reland TreeSliver (#149839) 2024-06-17 19:49:05 +00:00
sliver_tree.1_test.dart Reland TreeSliver (#149839) 2024-06-17 19:49:05 +00:00