346 lines
12 KiB
Dart
346 lines
12 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:math' as math;
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import 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter/rendering.dart';
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import '../rendering/mock_canvas.dart';
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final Matcher doesNotOverscroll = isNot(paints..circle());
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Future<void> slowDrag(WidgetTester tester, Offset start, Offset offset) async {
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final TestGesture gesture = await tester.startGesture(start);
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for (int index = 0; index < 10; index += 1) {
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await gesture.moveBy(offset);
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await tester.pump(const Duration(milliseconds: 20));
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}
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await gesture.up();
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}
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void main() {
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testWidgets('Overscroll indicator color', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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expect(painter, doesNotOverscroll);
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// the scroll gesture from tester.scroll happens in zero time, so nothing should appear:
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await tester.drag(find.byType(Scrollable), const Offset(0.0, 100.0));
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expect(painter, doesNotOverscroll);
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await tester.pump(); // allow the ticker to register itself
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expect(painter, doesNotOverscroll);
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await tester.pump(const Duration(milliseconds: 100)); // animate
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expect(painter, doesNotOverscroll);
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final TestGesture gesture = await tester.startGesture(const Offset(200.0, 200.0));
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await tester.pump(const Duration(milliseconds: 100)); // animate
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expect(painter, doesNotOverscroll);
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await gesture.up();
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expect(painter, doesNotOverscroll);
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
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expect(painter, paints..circle(color: const Color(0x0DFFFFFF)));
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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testWidgets('Nested scrollable', (WidgetTester tester) async {
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: GlowingOverscrollIndicator(
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axisDirection: AxisDirection.down,
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color: const Color(0x0DFFFFFF),
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notificationPredicate: (ScrollNotification notification) => notification.depth == 1,
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child: SingleChildScrollView(
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scrollDirection: Axis.horizontal,
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child: Container(
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width: 600.0,
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child: const CustomScrollView(
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
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],
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),
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),
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),
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),
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),
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);
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final RenderObject outerPainter = tester.renderObject(find.byType(CustomPaint).first);
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final RenderObject innerPainter = tester.renderObject(find.byType(CustomPaint).last);
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
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expect(outerPainter, paints..circle());
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expect(innerPainter, paints..circle());
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});
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testWidgets('Overscroll indicator changes side when you drag on the other side', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(400.0, 200.0), const Offset(0.0, 10.0));
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expect(painter, paints..circle(x: 400.0));
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await slowDrag(tester, const Offset(100.0, 200.0), const Offset(0.0, 10.0));
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expect(painter, paints..something((Symbol method, List<dynamic> arguments) {
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if (method != #drawCircle)
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return false;
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final Offset center = arguments[0] as Offset;
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if (center.dx < 400.0)
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return true;
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throw 'Dragging on left hand side did not overscroll on left hand side.';
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}));
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await slowDrag(tester, const Offset(700.0, 200.0), const Offset(0.0, 10.0));
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expect(painter, paints..something((Symbol method, List<dynamic> arguments) {
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if (method != #drawCircle)
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return false;
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final Offset center = arguments[0] as Offset;
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if (center.dx > 400.0)
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return true;
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throw 'Dragging on right hand side did not overscroll on right hand side.';
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}));
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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testWidgets('Overscroll indicator changes side when you shift sides', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 2000.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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final TestGesture gesture = await tester.startGesture(const Offset(300.0, 200.0));
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await gesture.moveBy(const Offset(0.0, 10.0));
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await tester.pump(const Duration(milliseconds: 20));
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double oldX = 0.0;
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for (int index = 0; index < 10; index += 1) {
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await gesture.moveBy(const Offset(50.0, 50.0));
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await tester.pump(const Duration(milliseconds: 20));
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expect(painter, paints..something((Symbol method, List<dynamic> arguments) {
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if (method != #drawCircle)
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return false;
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final Offset center = arguments[0] as Offset;
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if (center.dx <= oldX)
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throw 'Sliding to the right did not make the center of the radius slide to the right.';
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oldX = center.dx;
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return true;
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}));
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}
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await gesture.up();
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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group('Flipping direction of scrollable doesn\'t change overscroll behavior', () {
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testWidgets('down', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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physics: AlwaysScrollableScrollPhysics(),
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 20.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
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expect(painter, paints..save()..circle()..restore()..save()..scale(y: -1.0)..restore()..restore());
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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testWidgets('up', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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reverse: true,
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physics: AlwaysScrollableScrollPhysics(),
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 20.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
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expect(painter, paints..save()..scale(y: -1.0)..restore()..save()..circle()..restore()..restore());
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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});
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testWidgets('Overscroll in both directions', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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physics: AlwaysScrollableScrollPhysics(),
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 20.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, 5.0));
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expect(painter, paints..circle());
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expect(painter, isNot(paints..circle()..circle()));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(0.0, -5.0));
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expect(painter, paints..circle()..circle());
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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testWidgets('Overscroll horizontally', (WidgetTester tester) async {
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await tester.pumpWidget(
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const Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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scrollDirection: Axis.horizontal,
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physics: AlwaysScrollableScrollPhysics(),
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 20.0)),
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],
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),
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),
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);
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final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
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expect(painter, paints..rotate(angle: math.pi / 2.0)..circle()..saveRestore());
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expect(painter, isNot(paints..circle()..circle()));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(-5.0, 0.0));
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expect(painter, paints..rotate(angle: math.pi / 2.0)..circle()
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..rotate(angle: math.pi / 2.0)..circle());
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await tester.pumpAndSettle(const Duration(seconds: 1));
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expect(painter, doesNotOverscroll);
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});
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testWidgets('Nested overscrolls do not throw exceptions', (WidgetTester tester) async {
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await tester.pumpWidget(Directionality(
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textDirection: TextDirection.ltr,
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child: PageView(
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children: <Widget>[
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ListView(
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children: <Widget>[
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Container(
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width: 2000.0,
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height: 2000.0,
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color: const Color(0xFF00FF00),
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),
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],
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),
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],
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),
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));
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await tester.dragFrom(const Offset(100.0, 100.0), const Offset(0.0, 2000.0));
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await tester.pumpAndSettle();
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});
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testWidgets('Changing settings', (WidgetTester tester) async {
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RenderObject painter;
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ScrollConfiguration(
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behavior: TestScrollBehavior1(),
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child: const CustomScrollView(
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scrollDirection: Axis.horizontal,
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physics: AlwaysScrollableScrollPhysics(),
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reverse: true,
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 20.0)),
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],
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),
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),
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),
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);
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painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
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expect(painter, paints..rotate(angle: math.pi / 2.0)..circle(color: const Color(0x0A00FF00)));
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expect(painter, isNot(paints..circle()..circle()));
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await tester.pumpAndSettle(const Duration(seconds: 1));
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ScrollConfiguration(
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behavior: TestScrollBehavior2(),
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child: const CustomScrollView(
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scrollDirection: Axis.horizontal,
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physics: AlwaysScrollableScrollPhysics(),
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slivers: <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 20.0)),
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],
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),
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),
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),
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);
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painter = tester.renderObject(find.byType(CustomPaint));
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await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
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expect(painter, paints..rotate(angle: math.pi / 2.0)..circle(color: const Color(0x0A0000FF))..saveRestore());
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expect(painter, isNot(paints..circle()..circle()));
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});
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}
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class TestScrollBehavior1 extends ScrollBehavior {
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@override
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Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) {
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return GlowingOverscrollIndicator(
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child: child,
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axisDirection: axisDirection,
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color: const Color(0xFF00FF00),
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);
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}
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}
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class TestScrollBehavior2 extends ScrollBehavior {
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@override
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Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) {
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return GlowingOverscrollIndicator(
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child: child,
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axisDirection: axisDirection,
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color: const Color(0xFF0000FF),
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);
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}
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}
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