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