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Spacer should only flex in the main axis direction. (#18052)

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Ian Hickson 2018-05-31 20:38:37 -07:00 committed by GitHub
parent c7a13e67fd
commit 1891173999
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 24 additions and 5 deletions
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5
packages/flutter/lib/src/widgets/spacer.dart
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@ -59,8 +59,9 @@ class Spacer extends StatelessWidget {
Widget build(BuildContext context) {
return new Expanded(
flex: flex,
child: new ConstrainedBox(
constraints: const BoxConstraints.expand(),
child: const SizedBox(
height: 0.0,
width: 0.0,
),
);
}

24
packages/flutter/test/widgets/spacer_test.dart
View File

@ -15,8 +15,8 @@ void main() {
],
));
final Rect spacerRect = tester.getRect(find.byType(Spacer));
expect(spacerRect.size, const Size(800.0, 580.0));
expect(spacerRect.topLeft, const Offset(0.0, 10.0));
expect(spacerRect.size, const Size(0.0, 580.0));
expect(spacerRect.topLeft, const Offset(400.0, 10.0));
});
testWidgets('Spacer takes up space proportional to flex.', (WidgetTester tester) async {
@ -42,7 +42,7 @@ void main() {
final Rect spacer2Rect = tester.getRect(find.byType(Spacer).at(1));
final Rect spacer3Rect = tester.getRect(find.byType(Spacer).at(2));
final Rect spacer4Rect = tester.getRect(find.byType(Spacer).at(3));
expect(spacer1Rect.size.height, 600.0);
expect(spacer1Rect.size.height, 0.0);
expect(spacer1Rect.size.width, closeTo(93.8, 0.1));
expect(spacer1Rect.left, closeTo(696.3, 0.1));
expect(spacer2Rect.size.width, closeTo(93.8, 0.1));
@ -52,4 +52,22 @@ void main() {
expect(spacer4Rect.size.width, spacer3Rect.size.width * 2.0);
expect(spacer4Rect.left, closeTo(10.0, 0.1));
});
testWidgets('Spacer takes up space.', (WidgetTester tester) async {
await tester.pumpWidget(new UnconstrainedBox(
constrainedAxis: Axis.vertical,
child: new Column(
children: const <Widget>[
const SizedBox(width: 20.0, height: 10.0),
const Spacer(),
const SizedBox(width: 10.0, height: 10.0),
],
),
));
final Rect spacerRect = tester.getRect(find.byType(Spacer));
final Rect flexRect = tester.getRect(find.byType(Column));
expect(spacerRect.size, const Size(0.0, 580.0));
expect(spacerRect.topLeft, const Offset(400.0, 10.0));
expect(flexRect, new Rect.fromLTWH(390.0, 0.0, 20.0, 600.0));
});
}