blob: c1a58f9df513e709f66ddebd0caf003b3f4077ef [file] [log] [blame]
// 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 'dart:math' as math;
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/rendering.dart';
import '../rendering/mock_canvas.dart';
final Matcher doesNotOverscroll = isNot(paints..circle());
Future<void> slowDrag(WidgetTester tester, Offset start, Offset offset) async {
final TestGesture gesture = await tester.startGesture(start);
for (int index = 0; index < 10; index += 1) {
await gesture.moveBy(offset);
await tester.pump(const Duration(milliseconds: 20));
}
await gesture.up();
}
void main() {
testWidgets('Overscroll indicator color', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
expect(painter, doesNotOverscroll);
// the scroll gesture from tester.scroll happens in zero time, so nothing should appear:
await tester.drag(find.byType(Scrollable), const Offset(0.0, 100.0));
expect(painter, doesNotOverscroll);
await tester.pump(); // allow the ticker to register itself
expect(painter, doesNotOverscroll);
await tester.pump(const Duration(milliseconds: 100)); // animate
expect(painter, doesNotOverscroll);
final TestGesture gesture = await tester.startGesture(const Offset(200.0, 200.0));
await tester.pump(const Duration(milliseconds: 100)); // animate
expect(painter, doesNotOverscroll);
await gesture.up();
expect(painter, doesNotOverscroll);
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
expect(painter, paints..circle(color: const Color(0x0DFFFFFF)));
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
testWidgets('Nested scrollable', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GlowingOverscrollIndicator(
axisDirection: AxisDirection.down,
color: const Color(0x0DFFFFFF),
notificationPredicate: (ScrollNotification notification) => notification.depth == 1,
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Container(
width: 600.0,
child: const CustomScrollView(
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
],
),
),
),
),
),
);
final RenderObject outerPainter = tester.renderObject(find.byType(CustomPaint).first);
final RenderObject innerPainter = tester.renderObject(find.byType(CustomPaint).last);
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
expect(outerPainter, paints..circle());
expect(innerPainter, paints..circle());
});
testWidgets('Overscroll indicator changes side when you drag on the other side', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(400.0, 200.0), const Offset(0.0, 10.0));
expect(painter, paints..circle(x: 400.0));
await slowDrag(tester, const Offset(100.0, 200.0), const Offset(0.0, 10.0));
expect(painter, paints..something((Symbol method, List<dynamic> arguments) {
if (method != #drawCircle)
return false;
final Offset center = arguments[0] as Offset;
if (center.dx < 400.0)
return true;
throw 'Dragging on left hand side did not overscroll on left hand side.';
}));
await slowDrag(tester, const Offset(700.0, 200.0), const Offset(0.0, 10.0));
expect(painter, paints..something((Symbol method, List<dynamic> arguments) {
if (method != #drawCircle)
return false;
final Offset center = arguments[0] as Offset;
if (center.dx > 400.0)
return true;
throw 'Dragging on right hand side did not overscroll on right hand side.';
}));
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
testWidgets('Overscroll indicator changes side when you shift sides', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
final TestGesture gesture = await tester.startGesture(const Offset(300.0, 200.0));
await gesture.moveBy(const Offset(0.0, 10.0));
await tester.pump(const Duration(milliseconds: 20));
double oldX = 0.0;
for (int index = 0; index < 10; index += 1) {
await gesture.moveBy(const Offset(50.0, 50.0));
await tester.pump(const Duration(milliseconds: 20));
expect(painter, paints..something((Symbol method, List<dynamic> arguments) {
if (method != #drawCircle)
return false;
final Offset center = arguments[0] as Offset;
if (center.dx <= oldX)
throw 'Sliding to the right did not make the center of the radius slide to the right.';
oldX = center.dx;
return true;
}));
}
await gesture.up();
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
group("Flipping direction of scrollable doesn't change overscroll behavior", () {
testWidgets('down', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
physics: AlwaysScrollableScrollPhysics(),
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 20.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
expect(painter, paints..save()..circle()..restore()..save()..scale(y: -1.0)..restore()..restore());
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
testWidgets('up', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
reverse: true,
physics: AlwaysScrollableScrollPhysics(),
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 20.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
expect(painter, paints..save()..scale(y: -1.0)..restore()..save()..circle()..restore()..restore());
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
});
testWidgets('Overscroll in both directions', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
physics: AlwaysScrollableScrollPhysics(),
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 20.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
expect(painter, paints..circle());
expect(painter, isNot(paints..circle()..circle()));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, -5.0));
expect(painter, paints..circle()..circle());
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
testWidgets('Overscroll horizontally', (WidgetTester tester) async {
await tester.pumpWidget(
const Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
scrollDirection: Axis.horizontal,
physics: AlwaysScrollableScrollPhysics(),
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 20.0)),
],
),
),
);
final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
expect(painter, paints..rotate(angle: math.pi / 2.0)..circle()..saveRestore());
expect(painter, isNot(paints..circle()..circle()));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(-5.0, 0.0));
expect(painter, paints..rotate(angle: math.pi / 2.0)..circle()
..rotate(angle: math.pi / 2.0)..circle());
await tester.pumpAndSettle(const Duration(seconds: 1));
expect(painter, doesNotOverscroll);
});
testWidgets('Nested overscrolls do not throw exceptions', (WidgetTester tester) async {
await tester.pumpWidget(Directionality(
textDirection: TextDirection.ltr,
child: PageView(
children: <Widget>[
ListView(
children: <Widget>[
Container(
width: 2000.0,
height: 2000.0,
color: const Color(0xFF00FF00),
),
],
),
],
),
));
await tester.dragFrom(const Offset(100.0, 100.0), const Offset(0.0, 2000.0));
await tester.pumpAndSettle();
});
testWidgets('Changing settings', (WidgetTester tester) async {
RenderObject painter;
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: ScrollConfiguration(
behavior: TestScrollBehavior1(),
child: const CustomScrollView(
scrollDirection: Axis.horizontal,
physics: AlwaysScrollableScrollPhysics(),
reverse: true,
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 20.0)),
],
),
),
),
);
painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
expect(painter, paints..rotate(angle: math.pi / 2.0)..circle(color: const Color(0x0A00FF00)));
expect(painter, isNot(paints..circle()..circle()));
await tester.pumpAndSettle(const Duration(seconds: 1));
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: ScrollConfiguration(
behavior: TestScrollBehavior2(),
child: const CustomScrollView(
scrollDirection: Axis.horizontal,
physics: AlwaysScrollableScrollPhysics(),
slivers: <Widget>[
SliverToBoxAdapter(child: SizedBox(height: 20.0)),
],
),
),
),
);
painter = tester.renderObject(find.byType(CustomPaint));
await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
expect(painter, paints..rotate(angle: math.pi / 2.0)..circle(color: const Color(0x0A0000FF))..saveRestore());
expect(painter, isNot(paints..circle()..circle()));
});
}
class TestScrollBehavior1 extends ScrollBehavior {
@override
Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) {
return GlowingOverscrollIndicator(
child: child,
axisDirection: axisDirection,
color: const Color(0xFF00FF00),
);
}
}
class TestScrollBehavior2 extends ScrollBehavior {
@override
Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) {
return GlowingOverscrollIndicator(
child: child,
axisDirection: axisDirection,
color: const Color(0xFF0000FF),
);
}
}