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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 'dart:ui';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
/*
* Here lies tests for packages/flutter_test/lib/src/animation_sheet.dart
* because [matchesGoldenFile] does not use Skia Gold in its native package.
*/
testWidgets('correctly records frames', (WidgetTester tester) async {
final AnimationSheetBuilder builder = AnimationSheetBuilder(frameSize: _DecuplePixels.size);
await tester.pumpFrames(
builder.record(
const _DecuplePixels(Duration(seconds: 1)),
),
const Duration(milliseconds: 200),
const Duration(milliseconds: 100),
);
await tester.pumpFrames(
builder.record(
const _DecuplePixels(Duration(seconds: 1)),
recording: false,
),
const Duration(milliseconds: 200),
const Duration(milliseconds: 100),
);
await tester.pumpFrames(
builder.record(
const _DecuplePixels(Duration(seconds: 1)),
recording: true,
),
const Duration(milliseconds: 400),
const Duration(milliseconds: 100),
);
final Widget display = await builder.display();
await tester.binding.setSurfaceSize(builder.sheetSize());
await tester.pumpWidget(display);
await expectLater(find.byWidget(display), matchesGoldenFile('test.animation_sheet_builder.records.png'));
}, skip: isBrowser); // https://github.com/flutter/flutter/issues/42767
testWidgets('correctly wraps a row', (WidgetTester tester) async {
final AnimationSheetBuilder builder = AnimationSheetBuilder(frameSize: _DecuplePixels.size);
const Duration duration = Duration(seconds: 2);
await tester.pumpFrames(
builder.record(const _DecuplePixels(duration)),
duration,
const Duration(milliseconds: 200),
);
final Widget display = await builder.display();
await tester.binding.setSurfaceSize(builder.sheetSize(maxWidth: 80));
await tester.pumpWidget(display);
await expectLater(find.byWidget(display), matchesGoldenFile('test.animation_sheet_builder.wraps.png'));
}, skip: isBrowser); // https://github.com/flutter/flutter/issues/42767
}
// An animation of a yellow pixel moving from left to right, in a container of
// (10, 1) with a 1-pixel-wide black border.
class _DecuplePixels extends StatefulWidget {
const _DecuplePixels(this.duration);
static const Size size = Size(12, 3);
final Duration duration;
@override
State<StatefulWidget> createState() => _DecuplePixelsState();
}
class _DecuplePixelsState extends State<_DecuplePixels> with SingleTickerProviderStateMixin<_DecuplePixels> {
late AnimationController _controller;
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: widget.duration,
vsync: this,
);
_controller.repeat();
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return AnimatedBuilder(
animation: _controller.view,
builder: (BuildContext context, Widget? child) {
return CustomPaint(
painter: _PaintDecuplePixels(_controller.value),
);
},
);
}
}
class _PaintDecuplePixels extends CustomPainter {
_PaintDecuplePixels(this.value);
final double value;
@override
bool shouldRepaint(_PaintDecuplePixels oldDelegate) {
return oldDelegate.value != value;
}
@override
void paint(Canvas canvas, Size size) {
canvas.save();
final Rect rect = RectTween(
begin: const Rect.fromLTWH(1, 1, 1, 1),
end: const Rect.fromLTWH(11, 1, 1, 1),
).transform(value)!;
canvas.drawRect(rect, Paint()..color = Colors.yellow);
final Paint black = Paint()..color = Colors.black;
canvas
// Top border
..drawRect(const Rect.fromLTRB(0, 0, 12, 1), black)
// Bottom border
..drawRect(const Rect.fromLTRB(0, 2, 12, 3), black)
// Left border
..drawRect(const Rect.fromLTRB(0, 0, 1, 3), black)
// Right border
..drawRect(const Rect.fromLTRB(11, 0, 12, 3), black);
canvas.restore();
}
}