flutter-go/packages/flutter_web/test/rendering/limited_box_test.dart

// Copyright 2016 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_web/material.dart';
import 'package:flutter_web/rendering.dart';
import 'package:flutter_web_test/flutter_web_test.dart';

import 'rendering_tester.dart';

void main() {
  test('LimitedBox: parent max size is unconstrained', () {
    final RenderBox child = new RenderConstrainedBox(
        additionalConstraints:
            const BoxConstraints.tightFor(width: 300.0, height: 400.0));
    final RenderBox parent = new RenderConstrainedOverflowBox(
        minWidth: 0.0,
        maxWidth: double.infinity,
        minHeight: 0.0,
        maxHeight: double.infinity,
        child: new RenderLimitedBox(
            maxWidth: 100.0, maxHeight: 200.0, child: child));
    layout(parent);
    expect(child.size.width, 100.0);
    expect(child.size.height, 200.0);
  });

  test('LimitedBox: parent maxWidth is unconstrained', () {
    final RenderBox child = new RenderConstrainedBox(
        additionalConstraints:
            const BoxConstraints.tightFor(width: 300.0, height: 400.0));
    final RenderBox parent = new RenderConstrainedOverflowBox(
        minWidth: 0.0,
        maxWidth: double.infinity,
        minHeight: 500.0,
        maxHeight: 500.0,
        child: new RenderLimitedBox(
            maxWidth: 100.0, maxHeight: 200.0, child: child));
    layout(parent);
    expect(child.size.width, 100.0);
    expect(child.size.height, 500.0);
  });

  test('LimitedBox: parent maxHeight is unconstrained', () {
    final RenderBox child = new RenderConstrainedBox(
        additionalConstraints:
            const BoxConstraints.tightFor(width: 300.0, height: 400.0));
    final RenderBox parent = new RenderConstrainedOverflowBox(
        minWidth: 500.0,
        maxWidth: 500.0,
        minHeight: 0.0,
        maxHeight: double.infinity,
        child: new RenderLimitedBox(
            maxWidth: 100.0, maxHeight: 200.0, child: child));
    layout(parent);

    expect(child.size.width, 500.0);
    expect(child.size.height, 200.0);
  });

  test('LimitedBox: no child', () {
    RenderBox box;
    final RenderBox parent = new RenderConstrainedOverflowBox(
        minWidth: 10.0,
        maxWidth: 500.0,
        minHeight: 0.0,
        maxHeight: double.infinity,
        child: box = new RenderLimitedBox(
          maxWidth: 100.0,
          maxHeight: 200.0,
        ));
    layout(parent);
    expect(box.size, const Size(10.0, 0.0));
  });

  test('LimitedBox: no child use parent', () {
    RenderBox box;
    final RenderBox parent = new RenderConstrainedOverflowBox(
        minWidth: 10.0,
        child: box = new RenderLimitedBox(
          maxWidth: 100.0,
          maxHeight: 200.0,
        ));
    layout(parent);
    expect(box.size, const Size(10.0, 600.0));
  });
}