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6204eb6445
RenderSliverFloatingPersistentHeader does not pin to the leading edge of the viewport so the value of maxScrollObstructionExtent in it's SliverGeometry should be 0 per the docs at https://api.flutter.dev/flutter/rendering/SliverGeometry/maxScrollObstructionExtent.html.
40 lines
1.2 KiB
Dart
40 lines
1.2 KiB
Dart
// Copyright 2019 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/rendering.dart';
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import '../flutter_test_alternative.dart';
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import 'rendering_tester.dart';
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void main() {
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// Regression test for https://github.com/flutter/flutter/issues/35426.
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test('RenderSliverFloatingPersistentHeader maxScrollObstructionExtent is 0', () {
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final TestRenderSliverFloatingPersistentHeader header = TestRenderSliverFloatingPersistentHeader(child: RenderSizedBox(const Size(400.0, 100.0)));
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final RenderViewport root = RenderViewport(
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axisDirection: AxisDirection.down,
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crossAxisDirection: AxisDirection.right,
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offset: ViewportOffset.zero(),
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cacheExtent: 0,
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children: <RenderSliver>[
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header,
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],
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);
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layout(root);
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expect(header.geometry.maxScrollObstructionExtent, 0);
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});
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}
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class TestRenderSliverFloatingPersistentHeader extends RenderSliverFloatingPersistentHeader {
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TestRenderSliverFloatingPersistentHeader({
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RenderBox child,
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}) : super(child: child);
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@override
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double get maxExtent => 200;
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@override
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double get minExtent => 100;
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}
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