| // 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(); |
| } |