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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:async';
import 'dart:typed_data';
import 'dart:ui' as ui;
import 'package:flutter/foundation.dart';
import 'package:flutter/painting.dart';
import 'package:flutter_test/flutter_test.dart';
import '../rendering/mock_canvas.dart';
import '../rendering/rendering_tester.dart';
void main() {
TestRenderingFlutterBinding(); // initializes the imageCache
test('ShapeDecoration constructor', () {
const Color colorR = Color(0xffff0000);
const Color colorG = Color(0xff00ff00);
const Gradient gradient = LinearGradient(colors: <Color>[colorR, colorG]);
expect(const ShapeDecoration(shape: Border()), const ShapeDecoration(shape: Border()));
expect(() => ShapeDecoration(color: colorR, gradient: nonconst(gradient), shape: const Border()), throwsAssertionError);
expect(() => ShapeDecoration(gradient: nonconst(gradient), shape: null), throwsAssertionError);
expect(
ShapeDecoration.fromBoxDecoration(const BoxDecoration(shape: BoxShape.circle)),
const ShapeDecoration(shape: CircleBorder(side: BorderSide.none)),
);
expect(
ShapeDecoration.fromBoxDecoration(BoxDecoration(shape: BoxShape.rectangle, borderRadius: BorderRadiusDirectional.circular(100.0))),
ShapeDecoration(shape: RoundedRectangleBorder(borderRadius: BorderRadiusDirectional.circular(100.0))),
);
expect(
ShapeDecoration.fromBoxDecoration(BoxDecoration(shape: BoxShape.circle, border: Border.all(color: colorG))),
const ShapeDecoration(shape: CircleBorder(side: BorderSide(color: colorG))),
);
expect(
ShapeDecoration.fromBoxDecoration(BoxDecoration(shape: BoxShape.rectangle, border: Border.all(color: colorR))),
ShapeDecoration(shape: Border.all(color: colorR)),
);
expect(
ShapeDecoration.fromBoxDecoration(const BoxDecoration(shape: BoxShape.rectangle, border: BorderDirectional(start: BorderSide()))),
const ShapeDecoration(shape: BorderDirectional(start: BorderSide())),
);
});
test('ShapeDecoration.lerp and hit test', () {
const Decoration a = ShapeDecoration(shape: CircleBorder());
const Decoration b = ShapeDecoration(shape: RoundedRectangleBorder());
expect(Decoration.lerp(a, b, 0.0), a);
expect(Decoration.lerp(a, b, 1.0), b);
const Size size = Size(200.0, 100.0); // at t=0.5, width will be 150 (x=25 to x=175).
expect(a.hitTest(size, const Offset(20.0, 50.0)), isFalse);
expect(Decoration.lerp(a, b, 0.1).hitTest(size, const Offset(20.0, 50.0)), isFalse);
expect(Decoration.lerp(a, b, 0.5).hitTest(size, const Offset(20.0, 50.0)), isFalse);
expect(Decoration.lerp(a, b, 0.9).hitTest(size, const Offset(20.0, 50.0)), isTrue);
expect(b.hitTest(size, const Offset(20.0, 50.0)), isTrue);
});
test('ShapeDecoration.image RTL test', () {
final List<int> log = <int>[];
final ShapeDecoration decoration = ShapeDecoration(
shape: const CircleBorder(),
image: DecorationImage(
image: TestImageProvider(),
alignment: AlignmentDirectional.bottomEnd,
),
);
final BoxPainter painter = decoration.createBoxPainter(() { log.add(0); });
expect((Canvas canvas) => painter.paint(canvas, Offset.zero, const ImageConfiguration(size: Size(100.0, 100.0))), paintsAssertion);
expect(
(Canvas canvas) {
return painter.paint(
canvas,
const Offset(20.0, -40.0),
const ImageConfiguration(
size: Size(1000.0, 1000.0),
textDirection: TextDirection.rtl,
),
);
},
paints
..drawImageRect(source: const Rect.fromLTRB(0.0, 0.0, 100.0, 200.0), destination: const Rect.fromLTRB(20.0, 1000.0 - 40.0 - 200.0, 20.0 + 100.0, 1000.0 - 40.0)),
);
expect(
(Canvas canvas) {
return painter.paint(
canvas,
Offset.zero,
const ImageConfiguration(
size: Size(100.0, 200.0),
textDirection: TextDirection.ltr,
),
);
},
isNot(paints..image()), // we always use drawImageRect
);
expect(log, isEmpty);
});
test('ShapeDecoration.getClipPath', () {
const ShapeDecoration decoration = ShapeDecoration(shape: CircleBorder(side: BorderSide.none));
const Rect rect = Rect.fromLTWH(0.0, 0.0, 100.0, 20.0);
final Path clipPath = decoration.getClipPath(rect, TextDirection.ltr);
final Matcher isLookLikeExpectedPath = isPathThat(
includes: const <Offset>[ Offset(50.0, 10.0), ],
excludes: const <Offset>[ Offset(1.0, 1.0), Offset(30.0, 10.0), Offset(99.0, 19.0), ],
);
expect(clipPath, isLookLikeExpectedPath);
});
}
class TestImageProvider extends ImageProvider<TestImageProvider> {
@override
Future<TestImageProvider> obtainKey(ImageConfiguration configuration) {
return SynchronousFuture<TestImageProvider>(this);
}
@override
ImageStreamCompleter load(TestImageProvider key, DecoderCallback decode) {
return OneFrameImageStreamCompleter(
SynchronousFuture<ImageInfo>(ImageInfo(image: TestImage(), scale: 1.0)),
);
}
}
class TestImage implements ui.Image {
@override
int get width => 100;
@override
int get height => 200;
@override
void dispose() { }
@override
Future<ByteData> toByteData({ ui.ImageByteFormat format = ui.ImageByteFormat.rawRgba }) async {
throw UnsupportedError('Cannot encode test image');
}
}