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bef11d207f
There is a lot of cross-library importing in the framework unit tests that I'd like to clean up, see the design doc for more: https://docs.google.com/document/d/1UHxALQqCbmgjnM1RNV9xE2pK3IGyx-UktGX1D7hYCjs/edit?tab=t.0 This PR cleans up a few obvious instances and adds TODOs for others. I created this while doing an investigation for the design doc linked above. I hope that we'll be able to follow up with fixes for all of the problematic tests (tracked in the issue below). Part of https://github.com/flutter/flutter/issues/177028
88 lines
2.1 KiB
Dart
88 lines
2.1 KiB
Dart
// Copyright 2014 The Flutter 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/rendering.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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const red = Color(0xffff0000);
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testWidgets('RenderOpacity avoids repainting and does not drop layer at fully opaque', (
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WidgetTester tester,
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) async {
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RenderTestObject.paintCount = 0;
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await tester.pumpWidget(
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const ColoredBox(
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color: red,
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child: Opacity(opacity: 0.0, child: TestWidget()),
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),
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);
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expect(RenderTestObject.paintCount, 0);
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await tester.pumpWidget(
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const ColoredBox(
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color: red,
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child: Opacity(opacity: 0.1, child: TestWidget()),
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),
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);
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expect(RenderTestObject.paintCount, 1);
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await tester.pumpWidget(
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const ColoredBox(
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color: red,
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child: Opacity(opacity: 1, child: TestWidget()),
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),
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);
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expect(RenderTestObject.paintCount, 1);
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});
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testWidgets('RenderOpacity allows opacity layer to be dropped at 0 opacity', (
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WidgetTester tester,
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) async {
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RenderTestObject.paintCount = 0;
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await tester.pumpWidget(
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const ColoredBox(
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color: red,
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child: Opacity(opacity: 0.5, child: TestWidget()),
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),
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);
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expect(RenderTestObject.paintCount, 1);
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await tester.pumpWidget(
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const ColoredBox(
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color: red,
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child: Opacity(opacity: 0.0, child: TestWidget()),
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),
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);
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expect(RenderTestObject.paintCount, 1);
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expect(tester.layers, isNot(contains(isA<OpacityLayer>())));
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});
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}
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class TestWidget extends SingleChildRenderObjectWidget {
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const TestWidget({super.key, super.child});
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@override
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RenderObject createRenderObject(BuildContext context) {
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return RenderTestObject();
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}
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}
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class RenderTestObject extends RenderProxyBox {
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static int paintCount = 0;
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@override
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void paint(PaintingContext context, Offset offset) {
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paintCount += 1;
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super.paint(context, offset);
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}
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}
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