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import 'package:flutter/rendering.dart';
import 'package:test/test.dart';
import 'rendering_tester.dart';
void main() {
test('Stack can layout with top, right, bottom, left 0.0', () {
RenderBox size = new RenderConstrainedBox(
additionalConstraints: new BoxConstraints.tight(const Size(100.0, 100.0)));
RenderBox red = new RenderDecoratedBox(
decoration: new BoxDecoration(
backgroundColor: const Color(0xFFFF0000)
),
child: size);
RenderBox green = new RenderDecoratedBox(
decoration: new BoxDecoration(
backgroundColor: const Color(0xFFFF0000)
));
RenderBox stack = new RenderStack(children: <RenderBox>[red, green]);
(green.parentData as StackParentData)
..top = 0.0
..right = 0.0
..bottom = 0.0
..left = 0.0;
layout(stack, constraints: const BoxConstraints());
expect(stack.size.width, equals(100.0));
expect(stack.size.height, equals(100.0));
expect(red.size.width, equals(100.0));
expect(red.size.height, equals(100.0));
expect(green.size.width, equals(100.0));
expect(green.size.height, equals(100.0));
});
}