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Add a unit test for NavigationRail
(#143108)
Adding `SingleChildScrollView` to `NavigationRail` may cause exception if the nav rail has some expanded widgets inside, like the issue: https://github.com/flutter/flutter/issues/143061. This PR is just to add a unit test to avoid causing this breaking again.
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@ -3605,6 +3605,32 @@ void main() {
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expect(inkFeatures, paints..circle(color: Colors.transparent));
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}, skip: kIsWeb && !isCanvasKit); // https://github.com/flutter/flutter/issues/99933
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testWidgets('Navigation rail can have expanded widgets inside', (WidgetTester tester) async {
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await _pumpNavigationRail(
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tester,
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navigationRail: NavigationRail(
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selectedIndex: 0,
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destinations: const <NavigationRailDestination>[
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NavigationRailDestination(
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icon: Icon(Icons.favorite_border),
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label: Text('Abc'),
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),
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NavigationRailDestination(
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icon: Icon(Icons.bookmark_border),
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label: Text('Bcd'),
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),
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],
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trailing: const Expanded(
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child: Icon(Icons.search),
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),
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),
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);
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await tester.pumpAndSettle();
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expect(tester.takeException(), isNull);
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});
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group('Material 2', () {
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// These tests are only relevant for Material 2. Once Material 2
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// support is deprecated and the APIs are removed, these tests
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