scaffold_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/material.dart';
import 'package:flutter/rendering.dart';

void main() {
  testWidgets('Scaffold control test', (WidgetTester tester) async {
    Key bodyKey = new UniqueKey();
    await tester.pumpWidget(new Scaffold(
      appBar: new AppBar(title: new Text('Title')),
      body: new Container(key: bodyKey)
    ));

    RenderBox bodyBox = tester.renderObject(find.byKey(bodyKey));
    expect(bodyBox.size, equals(new Size(800.0, 544.0)));

    await tester.pumpWidget(new MediaQuery(
      data: new MediaQueryData(padding: new EdgeInsets.only(bottom: 100.0)),
      child: new Scaffold(
        appBar: new AppBar(title: new Text('Title')),
        body: new Container(key: bodyKey)
      )
    ));

    bodyBox = tester.renderObject(find.byKey(bodyKey));
    expect(bodyBox.size, equals(new Size(800.0, 444.0)));

    await tester.pumpWidget(new MediaQuery(
      data: new MediaQueryData(padding: new EdgeInsets.only(bottom: 100.0)),
      child: new Scaffold(
        appBar: new AppBar(title: new Text('Title')),
        body: new Container(key: bodyKey),
        resizeToAvoidBottomPadding: false
      )
    ));

    bodyBox = tester.renderObject(find.byKey(bodyKey));
    expect(bodyBox.size, equals(new Size(800.0, 544.0)));
  });

  testWidgets('Floating action animation', (WidgetTester tester) async {
    await tester.pumpWidget(new Scaffold(
      floatingActionButton: new FloatingActionButton(
        key: new Key("one"),
        onPressed: null,
        child: new Text("1")
      )
    ));

    expect(tester.binding.transientCallbackCount, 0);

    await tester.pumpWidget(new Scaffold(
      floatingActionButton: new FloatingActionButton(
        key: new Key("two"),
        onPressed: null,
        child: new Text("2")
      )
    ));

    expect(tester.binding.transientCallbackCount, greaterThan(0));
    await tester.pumpWidget(new Container());
    expect(tester.binding.transientCallbackCount, 0);
    await tester.pumpWidget(new Scaffold());
    expect(tester.binding.transientCallbackCount, 0);

    await tester.pumpWidget(new Scaffold(
      floatingActionButton: new FloatingActionButton(
        key: new Key("one"),
        onPressed: null,
        child: new Text("1")
      )
    ));

    expect(tester.binding.transientCallbackCount, greaterThan(0));
  });
}