coordinates_test.dart 1.34 KB
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// 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.

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import 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
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void main() {
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  testWidgets('Comparing coordinates', (WidgetTester tester) async {
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    Key keyA = new GlobalKey();
    Key keyB = new GlobalKey();
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    await tester.pumpWidget(
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      new Stack(
        children: <Widget>[
          new Positioned(
            top: 100.0,
            left: 100.0,
            child: new SizedBox(
              key: keyA,
              width: 10.0,
              height: 10.0
            )
          ),
          new Positioned(
            left: 100.0,
            top: 200.0,
            child: new SizedBox(
              key: keyB,
              width: 20.0,
              height: 10.0
            )
          ),
        ]
      )
    );
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    RenderBox boxA = tester.renderObject(find.byKey(keyA));
    expect(boxA.localToGlobal(const Point(0.0, 0.0)), equals(const Point(100.0, 100.0)));
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    RenderBox boxB = tester.renderObject(find.byKey(keyB));
    expect(boxB.localToGlobal(const Point(0.0, 0.0)), equals(const Point(100.0, 200.0)));
    expect(boxB.globalToLocal(const Point(110.0, 205.0)), equals(const Point(10.0, 5.0)));
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  });
}