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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 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'rendering_tester.dart';
void main() {
TestRenderingFlutterBinding.ensureInitialized();
test('RenderPositionedBox expands', () {
final RenderConstrainedBox sizer = RenderConstrainedBox(
additionalConstraints: BoxConstraints.tight(const Size(100.0, 100.0)),
child: RenderDecoratedBox(decoration: const BoxDecoration()),
);
final RenderPositionedBox positioner = RenderPositionedBox(child: sizer);
layout(positioner, constraints: BoxConstraints.loose(const Size(200.0, 200.0)));
expect(positioner.size.width, equals(200.0), reason: 'positioner width');
expect(positioner.size.height, equals(200.0), reason: 'positioner height');
});
test('RenderPositionedBox shrink wraps', () {
final RenderConstrainedBox sizer = RenderConstrainedBox(
additionalConstraints: BoxConstraints.tight(const Size(100.0, 100.0)),
child: RenderDecoratedBox(decoration: const BoxDecoration()),
);
final RenderPositionedBox positioner = RenderPositionedBox(child: sizer, widthFactor: 1.0);
layout(positioner, constraints: BoxConstraints.loose(const Size(200.0, 200.0)));
expect(positioner.size.width, equals(100.0), reason: 'positioner width');
expect(positioner.size.height, equals(200.0), reason: 'positioner height');
positioner.widthFactor = null;
positioner.heightFactor = 1.0;
pumpFrame();
expect(positioner.size.width, equals(200.0), reason: 'positioner width');
expect(positioner.size.height, equals(100.0), reason: 'positioner height');
positioner.widthFactor = 1.0;
pumpFrame();
expect(positioner.size.width, equals(100.0), reason: 'positioner width');
expect(positioner.size.height, equals(100.0), reason: 'positioner height');
});
test('RenderPositionedBox width and height factors', () {
final RenderConstrainedBox sizer = RenderConstrainedBox(
additionalConstraints: BoxConstraints.tight(const Size(100.0, 100.0)),
child: RenderDecoratedBox(decoration: const BoxDecoration()),
);
final RenderPositionedBox positioner = RenderPositionedBox(child: sizer, widthFactor: 1.0, heightFactor: 0.0);
layout(positioner, constraints: BoxConstraints.loose(const Size(200.0, 200.0)));
expect(positioner.size.width, equals(100.0));
expect(positioner.size.height, equals(0.0));
positioner.widthFactor = 0.5;
positioner.heightFactor = 0.5;
pumpFrame();
expect(positioner.size.width, equals(50.0));
expect(positioner.size.height, equals(50.0));
positioner.widthFactor = null;
positioner.heightFactor = null;
pumpFrame();
expect(positioner.size.width, equals(200.0));
expect(positioner.size.height, equals(200.0));
});
}