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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/widgets.dart';
void main() {
testWidgets('OverflowBar documented defaults', (WidgetTester tester) async {
final OverflowBar bar = OverflowBar();
expect(bar.spacing, 0);
expect(bar.overflowSpacing, 0);
expect(bar.overflowDirection, VerticalDirection.down);
expect(bar.textDirection, null);
expect(bar.clipBehavior, Clip.none);
expect(bar.children, const <Widget>[]);
});
testWidgets('Empty OverflowBar', (WidgetTester tester) async {
const Size size = Size(16, 24);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: ConstrainedBox(
constraints: BoxConstraints.tight(size),
child: OverflowBar(),
),
),
),
);
expect(tester.getSize(find.byType(OverflowBar)), size);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: OverflowBar(),
),
),
);
expect(tester.getSize(find.byType(OverflowBar)), Size.zero);
});
testWidgets('OverflowBar horizontal layout', (WidgetTester tester) async {
final Key child1Key = UniqueKey();
final Key child2Key = UniqueKey();
final Key child3Key = UniqueKey();
Widget buildFrame({ required double spacing, required TextDirection textDirection }) {
return Directionality(
textDirection: textDirection,
child: Align(
alignment: Alignment.topLeft,
child: OverflowBar(
spacing: spacing,
children: <Widget>[
SizedBox(width: 48, height: 48, key: child1Key),
SizedBox(width: 64, height: 64, key: child2Key),
SizedBox(width: 32, height: 32, key: child3Key),
],
),
),
);
}
// Children are vertically centered, start at x=0
await tester.pumpWidget(buildFrame(spacing: 0, textDirection: TextDirection.ltr));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 8, 48, 56));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(48, 0, 112, 64));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(112, 16, 144, 48));
// Children are vertically centered, start at x=0
await tester.pumpWidget(buildFrame(spacing: 10, textDirection: TextDirection.ltr));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 8, 48, 56));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(10.0 + 48, 0, 10.0 + 112, 64));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(10.0 + 112 + 10.0, 16, 10.0 + 10.0 + 144, 48));
// Children appear in reverse order for RTL
await tester.pumpWidget(buildFrame(spacing: 0, textDirection: TextDirection.rtl));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 16, 32, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(32, 0, 96, 64));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(96, 8, 144, 56));
// Children appear in reverse order for RTL
await tester.pumpWidget(buildFrame(spacing: 10, textDirection: TextDirection.rtl));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 16, 32, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(10.0 + 32, 0, 10.0 + 96, 64));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(10.0 + 96 + 10.0, 8, 10.0 + 10.0 + 144, 56));
});
testWidgets('OverflowBar vertical layout', (WidgetTester tester) async {
final Key child1Key = UniqueKey();
final Key child2Key = UniqueKey();
final Key child3Key = UniqueKey();
Widget buildFrame({
double overflowSpacing = 0,
VerticalDirection overflowDirection = VerticalDirection.down,
OverflowBarAlignment overflowAlignment = OverflowBarAlignment.start,
TextDirection textDirection = TextDirection.ltr,
}) {
return Directionality(
textDirection: textDirection,
child: Align(
alignment: Alignment.topLeft,
child: ConstrainedBox(
constraints: BoxConstraints.loose(const Size(100, double.infinity)),
child: OverflowBar(
overflowSpacing: overflowSpacing,
overflowAlignment: overflowAlignment,
overflowDirection: overflowDirection,
children: <Widget>[
SizedBox(width: 48, height: 48, key: child1Key),
SizedBox(width: 64, height: 64, key: child2Key),
SizedBox(width: 32, height: 32, key: child3Key),
],
),
),
),
);
}
// Children are left aligned
await tester.pumpWidget(buildFrame());
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 0, 48, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(0, 48, 64, 112));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 112, 32, 144));
// Children are left aligned
await tester.pumpWidget(buildFrame(overflowAlignment: OverflowBarAlignment.end, textDirection: TextDirection.rtl));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 0, 48, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(0, 48, 64, 112));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 112, 32, 144));
// Spaced children are left aligned
await tester.pumpWidget(buildFrame(overflowSpacing: 10));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 0, 48, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(0, 10.0 + 48, 64, 10.0 + 112));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 10.0 + 112 + 10.0, 32, 10.0 + 10.0 + 144));
// Left-aligned children appear in reverse order for VerticalDirection.up
await tester.pumpWidget(buildFrame(overflowDirection: VerticalDirection.up));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 0, 32, 32));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(0, 32, 64, 96));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 96, 48, 144));
// Left-aligned spaced children appear in reverse order for VerticalDirection.up
await tester.pumpWidget(buildFrame(overflowSpacing: 10, overflowDirection: VerticalDirection.up));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(0, 0, 32, 32));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(0, 10.0 + 32, 64, 10.0 + 96));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(0, 10.0 + 10.0 + 96, 48, 10.0 + 10.0 + 144));
// Children are right aligned
await tester.pumpWidget(buildFrame(overflowAlignment: OverflowBarAlignment.end));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(100.0 - 48, 0, 100, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(100.0 - 64, 48, 100, 112));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(100.0 - 32, 112, 100, 144));
// Children are right aligned
await tester.pumpWidget(buildFrame(overflowAlignment: OverflowBarAlignment.start, textDirection: TextDirection.rtl));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(100.0 - 48, 0, 100, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(100.0 - 64, 48, 100, 112));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(100.0 - 32, 112, 100, 144));
// Children are centered
await tester.pumpWidget(buildFrame(overflowAlignment: OverflowBarAlignment.center));
expect(tester.getRect(find.byKey(child1Key)), const Rect.fromLTRB(100.0/2.0 - 48/2, 0, 100.0/2.0 + 48/2, 48));
expect(tester.getRect(find.byKey(child2Key)), const Rect.fromLTRB(100.0/2.0 - 64/2, 48, 100.0/2.0 + 64/2, 112));
expect(tester.getRect(find.byKey(child3Key)), const Rect.fromLTRB(100.0/2.0 - 32/2, 112, 100.0/2.0 + 32/2, 144));
});
testWidgets('OverflowBar intrinsic width', (WidgetTester tester) async {
Widget buildFrame({ required double width }) {
return Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: Container(
width: width,
alignment: Alignment.topLeft,
child: IntrinsicWidth(
child: OverflowBar(
spacing: 4,
overflowSpacing: 8,
children: const <Widget>[
SizedBox(width: 48, height: 50),
SizedBox(width: 64, height: 25),
SizedBox(width: 32, height: 75),
],
),
),
),
),
);
}
await tester.pumpWidget(buildFrame(width: 800));
expect(tester.getSize(find.byType(OverflowBar)).width, 152); // 152 = 48 + 4 + 64 + 4 + 32
await tester.pumpWidget(buildFrame(width: 150));
expect(tester.getSize(find.byType(OverflowBar)).width, 150);
});
testWidgets('OverflowBar intrinsic height', (WidgetTester tester) async {
Widget buildFrame({ required double maxWidth }) {
return Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: Container(
width: maxWidth,
alignment: Alignment.topLeft,
child: IntrinsicHeight(
child: OverflowBar(
spacing: 4,
overflowSpacing: 8,
children: const <Widget>[
SizedBox(width: 48, height: 50),
SizedBox(width: 64, height: 25),
SizedBox(width: 32, height: 75),
],
),
),
),
),
);
}
await tester.pumpWidget(buildFrame(maxWidth: 800));
expect(tester.getSize(find.byType(OverflowBar)).height, 75); // 75 = max(50, 25, 75)
await tester.pumpWidget(buildFrame(maxWidth: 150));
expect(tester.getSize(find.byType(OverflowBar)).height, 166); // 166 = 50 + 8 + 25 + 8 + 75
});
}