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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/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
final Key blockKey = UniqueKey();
const double expandedAppbarHeight = 250.0;
final Key appbarContainerKey = UniqueKey();
void main() {
testWidgets('FlexibleSpaceBar collapse mode none', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: debugDefaultTargetPlatformOverride),
home: Scaffold(
body: CustomScrollView(
key: blockKey,
slivers: <Widget>[
SliverAppBar(
expandedHeight: expandedAppbarHeight,
pinned: true,
flexibleSpace: FlexibleSpaceBar(
background: Container(
key: appbarContainerKey,
),
collapseMode: CollapseMode.none,
),
),
SliverToBoxAdapter(
child: Container(
height: 10000.0,
),
),
],
),
),
),
);
final Finder appbarContainer = find.byKey(appbarContainerKey);
final Offset topBeforeScroll = tester.getTopLeft(appbarContainer);
await slowDrag(tester, blockKey, const Offset(0.0, -100.0));
final Offset topAfterScroll = tester.getTopLeft(appbarContainer);
expect(topBeforeScroll.dy, equals(0.0));
expect(topAfterScroll.dy, equals(0.0));
}, variant: TargetPlatformVariant.all(excluding: <TargetPlatform>{ TargetPlatform.fuchsia }));
testWidgets('FlexibleSpaceBar collapse mode pin', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: debugDefaultTargetPlatformOverride),
home: Scaffold(
body: CustomScrollView(
key: blockKey,
slivers: <Widget>[
SliverAppBar(
expandedHeight: expandedAppbarHeight,
pinned: true,
flexibleSpace: FlexibleSpaceBar(
background: Container(
key: appbarContainerKey,
),
collapseMode: CollapseMode.pin,
),
),
SliverToBoxAdapter(
child: Container(
height: 10000.0,
),
),
],
),
),
),
);
final Finder appbarContainer = find.byKey(appbarContainerKey);
final Offset topBeforeScroll = tester.getTopLeft(appbarContainer);
await slowDrag(tester, blockKey, const Offset(0.0, -100.0));
final Offset topAfterScroll = tester.getTopLeft(appbarContainer);
expect(topBeforeScroll.dy, equals(0.0));
expect(topAfterScroll.dy, equals(-100.0));
}, variant: TargetPlatformVariant.all(excluding: <TargetPlatform>{ TargetPlatform.fuchsia }));
testWidgets('FlexibleSpaceBar collapse mode parallax', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(platform: debugDefaultTargetPlatformOverride),
home: Scaffold(
body: CustomScrollView(
key: blockKey,
slivers: <Widget>[
SliverAppBar(
expandedHeight: expandedAppbarHeight,
pinned: true,
flexibleSpace: FlexibleSpaceBar(
background: Container(
key: appbarContainerKey,
),
),
),
SliverToBoxAdapter(
child: Container(
height: 10000.0,
),
),
],
),
),
),
);
final Finder appbarContainer = find.byKey(appbarContainerKey);
final Offset topBeforeScroll = tester.getTopLeft(appbarContainer);
await slowDrag(tester, blockKey, const Offset(0.0, -100.0));
final Offset topAfterScroll = tester.getTopLeft(appbarContainer);
expect(topBeforeScroll.dy, equals(0.0));
expect(topAfterScroll.dy, lessThan(10.0));
expect(topAfterScroll.dy, greaterThan(-50.0));
}, variant: TargetPlatformVariant.all(excluding: <TargetPlatform>{ TargetPlatform.fuchsia }));
}
Future<void> slowDrag(WidgetTester tester, Key widget, Offset offset) async {
final Offset target = tester.getCenter(find.byKey(widget));
final TestGesture gesture = await tester.startGesture(target);
await gesture.moveBy(offset);
await tester.pump(const Duration(milliseconds: 10));
await gesture.up();
}