packages/flutter/test/widgets/fractionally_sized_box_test.dart

// Copyright 2015 The Chromium 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_test/flutter_test.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';

void main() {
  testWidgets('FractionallySizedBox', (WidgetTester tester) async {
    final GlobalKey inner = GlobalKey();
    await tester.pumpWidget(OverflowBox(
      minWidth: 0.0,
      maxWidth: 100.0,
      minHeight: 0.0,
      maxHeight: 100.0,
      alignment: const Alignment(-1.0, -1.0),
      child: Center(
        child: FractionallySizedBox(
          widthFactor: 0.5,
          heightFactor: 0.25,
          child: Container(
            key: inner
          )
        )
      )
    ));
    final RenderBox box = inner.currentContext.findRenderObject();
    expect(box.size, equals(const Size(50.0, 25.0)));
    expect(box.localToGlobal(Offset.zero), equals(const Offset(25.0, 37.5)));
  });
}