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118 lines
3.3 KiB
Dart
118 lines
3.3 KiB
Dart
// Copyright 2015 The Chromium 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 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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import 'package:test/test.dart';
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const Size pageSize = const Size(800.0, 600.0);
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const List<int> pages = const <int>[0, 1, 2, 3, 4, 5];
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int currentPage = null;
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bool itemsWrap = false;
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Widget buildPage(BuildContext context, int page, int index) {
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return new Container(
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key: new ValueKey<int>(page),
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width: pageSize.width,
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height: pageSize.height,
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child: new Text(page.toString())
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);
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}
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Widget buildFrame() {
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// The test framework forces the frame (and so the PageableList)
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// to be 800x600. The pageSize constant reflects this.
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return new PageableList<int>(
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items: pages,
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itemBuilder: buildPage,
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itemsWrap: itemsWrap,
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itemExtent: pageSize.width,
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scrollDirection: ScrollDirection.horizontal,
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onPageChanged: (int page) { currentPage = page; }
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);
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}
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void page(WidgetTester tester, Offset offset) {
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String itemText = currentPage != null ? currentPage.toString() : '0';
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tester.scroll(tester.findText(itemText), offset);
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// One frame to start the animation, a second to complete it.
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tester.pump();
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tester.pump(const Duration(seconds: 1));
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}
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void pageLeft(WidgetTester tester) {
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page(tester, new Offset(-pageSize.width, 0.0));
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}
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void pageRight(WidgetTester tester) {
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page(tester, new Offset(pageSize.width, 0.0));
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}
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void main() {
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// PageableList with itemsWrap: false
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test('Scroll left from page 0 to page 1', () {
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testWidgets((WidgetTester tester) {
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currentPage = null;
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itemsWrap = false;
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tester.pumpWidget(buildFrame());
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expect(currentPage, isNull);
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pageLeft(tester);
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expect(currentPage, equals(1));
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});
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});
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test('Scroll right from page 1 to page 0', () {
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testWidgets((WidgetTester tester) {
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itemsWrap = false;
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tester.pumpWidget(buildFrame());
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expect(currentPage, equals(1));
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pageRight(tester);
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expect(currentPage, equals(0));
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});
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});
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test('Scroll right from page 0 does nothing (underscroll)', () {
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testWidgets((WidgetTester tester) {
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itemsWrap = false;
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tester.pumpWidget(buildFrame());
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expect(currentPage, equals(0));
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pageRight(tester);
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expect(currentPage, equals(0));
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});
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});
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// PageableList with itemsWrap: true
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test('Scroll left page 0 to page 1, itemsWrap: true', () {
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testWidgets((WidgetTester tester) {
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tester.pumpWidget(new Container());
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currentPage = null;
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itemsWrap = true;
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tester.pumpWidget(buildFrame());
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expect(currentPage, isNull);
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pageLeft(tester);
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expect(currentPage, equals(1));
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});
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});
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test('Scroll right from page 1 to page 0, itemsWrap: true', () {
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testWidgets((WidgetTester tester) {
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tester.pumpWidget(buildFrame());
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expect(currentPage, equals(1));
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pageRight(tester);
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expect(currentPage, equals(0));
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});
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});
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test('Scroll right from page 0 to page 5, itemsWrap: true (underscroll)', () {
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testWidgets((WidgetTester tester) {
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tester.pumpWidget(buildFrame());
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expect(currentPage, equals(0));
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pageRight(tester);
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expect(currentPage, equals(5));
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});
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});
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}
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