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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.
// @dart = 2.8
import 'package:flutter/rendering.dart';
import '../flutter_test_alternative.dart';
import 'rendering_tester.dart';
void main() {
// Regression test for https://github.com/flutter/flutter/issues/35426.
test('RenderSliverFloatingPersistentHeader maxScrollObstructionExtent is 0', () {
final TestRenderSliverFloatingPersistentHeader header = TestRenderSliverFloatingPersistentHeader(child: RenderSizedBox(const Size(400.0, 100.0)));
final RenderViewport root = RenderViewport(
axisDirection: AxisDirection.down,
crossAxisDirection: AxisDirection.right,
offset: ViewportOffset.zero(),
cacheExtent: 0,
children: <RenderSliver>[
header,
],
);
layout(root);
expect(header.geometry.maxScrollObstructionExtent, 0);
});
test('RenderSliverFloatingPinnedPersistentHeader maxScrollObstructionExtent is minExtent', () {
final TestRenderSliverFloatingPinnedPersistentHeader header = TestRenderSliverFloatingPinnedPersistentHeader(
child: RenderSizedBox(const Size(400.0, 100.0)
));
final RenderViewport root = RenderViewport(
axisDirection: AxisDirection.down,
crossAxisDirection: AxisDirection.right,
offset: ViewportOffset.zero(),
cacheExtent: 0,
children: <RenderSliver>[
header,
],
);
layout(root);
expect(header.geometry.maxScrollObstructionExtent, 100.0);
});
}
class TestRenderSliverFloatingPersistentHeader extends RenderSliverFloatingPersistentHeader {
TestRenderSliverFloatingPersistentHeader({
RenderBox child,
}) : super(child: child);
@override
double get maxExtent => 200;
@override
double get minExtent => 100;
}
class TestRenderSliverFloatingPinnedPersistentHeader extends RenderSliverFloatingPinnedPersistentHeader {
TestRenderSliverFloatingPinnedPersistentHeader({
RenderBox child,
}) : super(child: child);
@override
double get maxExtent => 200;
@override
double get minExtent => 100;
}