• Ian Hickson's avatar
    License update (#45373) · 449f4a66
    Ian Hickson authored
    * Update project.pbxproj files to say Flutter rather than Chromium
    
    Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.
    
    * Update the copyright notice checker to require a standard notice on all files
    
    * Update copyrights on Dart files. (This was a mechanical commit.)
    
    * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.
    
    Some were already marked "The Flutter Authors", not clear why. Their
    dates have been normalized. Some were missing the blank line after the
    license. Some were randomly different in trivial ways for no apparent
    reason (e.g. missing the trailing period).
    
    * Clean up the copyrights in non-Dart files. (Manual edits.)
    
    Also, make sure templates don't have copyrights.
    
    * Fix some more ORGANIZATIONNAMEs
    Unverified
    449f4a66
scrollbar_paint_test.dart 3.69 KB
// 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_test/flutter_test.dart';
import 'package:flutter/material.dart';

import '../rendering/mock_canvas.dart';

Widget _buildSingleChildScrollViewWithScrollbar({
  TextDirection textDirection = TextDirection.ltr,
  EdgeInsets padding = EdgeInsets.zero,
  Widget child,
}) {
  return Directionality(
    textDirection: textDirection,
    child: MediaQuery(
      data: MediaQueryData(padding: padding),
      child: Scrollbar(
        child: SingleChildScrollView(child: child),
      ),
    ),
  );
}

void main() {
  testWidgets('Viewport basic test (LTR)', (WidgetTester tester) async {
    await tester.pumpWidget(_buildSingleChildScrollViewWithScrollbar(
      child: const SizedBox(width: 4000.0, height: 4000.0),
    ));
    expect(find.byType(Scrollbar), isNot(paints..rect()));
    await tester.fling(find.byType(SingleChildScrollView), const Offset(0.0, -10.0), 10.0);
    expect(find.byType(Scrollbar), paints..rect(rect: const Rect.fromLTRB(800.0 - 6.0, 1.5, 800.0, 91.5)));
  });

  testWidgets('Viewport basic test (RTL)', (WidgetTester tester) async {
    await tester.pumpWidget(_buildSingleChildScrollViewWithScrollbar(
      textDirection: TextDirection.rtl,
      child: const SizedBox(width: 4000.0, height: 4000.0),
    ));
    expect(find.byType(Scrollbar), isNot(paints..rect()));
    await tester.fling(find.byType(SingleChildScrollView), const Offset(0.0, -10.0), 10.0);
    expect(find.byType(Scrollbar), paints..rect(rect: const Rect.fromLTRB(0.0, 1.5, 6.0, 91.5)));
  });

  testWidgets('workds with MaterialApp and Scaffold', (WidgetTester tester) async {
    await tester.pumpWidget(MaterialApp(
      home: MediaQuery(
        data: const MediaQueryData(
          padding: EdgeInsets.fromLTRB(0, 20, 0, 34)
        ),
        child: Scaffold(
          appBar: AppBar(title: const Text('Title')),
          body: Scrollbar(
            child: ListView(
              children: const <Widget>[SizedBox(width: 4000, height: 4000)]
            ),
          ),
        ),
      ),
    ));

    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(ListView)));
    // On Android it should not overscroll.
    await gesture.moveBy(const Offset(0, 100));
    // Trigger fade in animation.
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 500));

    expect(find.byType(Scrollbar), paints..rect(
      rect: const Rect.fromLTWH(
        800.0 - 6, // screen width - thickness
        0,         // the paint area starts from the bottom of the app bar
        6,         // thickness
        // 56 being the height of the app bar
        (600.0 - 56 - 34 - 20) / 4000 * (600 - 56 - 34 - 20),
      ),
    ));
  });

  testWidgets("should not paint when there isn't enough space", (WidgetTester tester) async {
    await tester.pumpWidget(MaterialApp(
      home: MediaQuery(
        data: const MediaQueryData(
          padding: EdgeInsets.fromLTRB(0, 20, 0, 34)
        ),
        child: Scaffold(
          appBar: AppBar(title: const Text('Title')),
          body: Scrollbar(
            child: ListView(
              children: const <Widget>[SizedBox(width: 40, height: 40)]
            ),
          ),
        ),
      ),
    ));

    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byType(ListView)));
    // On Android it should not overscroll.
    await gesture.moveBy(const Offset(0, 100));
    // Trigger fade in animation.
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 500));

    expect(find.byType(Scrollbar), isNot(paints..rect()));
  });

}