Can't get simple gallery to layout properly

[timcreatedit]

Hey there! I've tried to implement this package in two projects now, but both times I somehow couldn't get a simple Gallery to run. I must do something wrong because I've legitimately tried everyting I could think of (in the time I had), and I couldn't get past the layout issues even in the most basic cases.

Minimal repro:

testWidgets('can be used', (tester) async {
  final gallery = Gallery(
    'What am I doing wrong?',
    fileName: 'test',
    layout: const GridGoldenSceneLayout(),
  );

  for (final thickness in [0.0, 5, 10, 15, 20, 40, 100]) {
    gallery.itemFromWidget(
      description: 'thickness $thickness',
      widget: FlutterLogo(size: 200),
    );
  }

  await gallery.run(tester);
});

Produces this golden, along with a bunch of overflow exceptions

Things I've tried

• ColumnSceneLayout and RowSceneLayout
• Passing itemConstraints to the gallery
• A bunch of ways of trying to size the child explicitly