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如何在不同的屏幕大小上测试颤振小部件?

flutter-test flutter

Jordan Davies · 技术社区 · 7 年前

我有一个flatter小部件,它根据屏幕大小显示额外的数据。有人知道在多个不同的屏幕大小上测试这个小部件的方法吗?

widget_tester 源代码,但找不到任何内容。

2 回复 | 直到 7 年前

Rémi Rousselet 6 年前

可以使用指定自定义曲面大小 WidgetTester

import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets("foo", (tester) async {
    tester.binding.window.physicalSizeTestValue = Size(42, 42);

    // resets the screen to its orinal size after the test end
    addTearDown(tester.binding.window.clearPhysicalSizeTestValue);

    // TODO: do something
  });
}

VizGhar 7 年前

不知道为什么,但@rmi rousselet的解决方案对我不起作用。我必须使用 binding.window.physicalSizeTestValue binding.window.devicePixelRatioTestValue 所以输出是完全确定的

void main() {

  final TestWidgetsFlutterBinding binding =
    TestWidgetsFlutterBinding.ensureInitialized();

  testWidgets("Basic layout test (mobile device)", (tester) async {
    binding.window.physicalSizeTestValue = Size(400, 200);
    binding.window.devicePixelRatioTestValue = 1.0;

    await tester.pumpWidget(new MyApp());

    expect(find.byType(MyHomePage), findsOneWidget);
    // etc.
  });
}

Pegasis 6 年前

有一个叫做 device_preview 可以模拟在不同设备上运行的颤振应用程序。

Mark 7 年前

此外,如果要测试方向更改,请尝试以下操作:

const double PORTRAIT_WIDTH = 400.0;
const double PORTRAIT_HEIGHT = 800.0;
const double LANDSCAPE_WIDTH = PORTRAIT_HEIGHT;
const double LANDSCAPE_HEIGHT = PORTRAIT_WIDTH;

final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();

await binding.setSurfaceSize(Size(PORTRAIT_WIDTH, PORTRAIT_HEIGHT));
await tester.pumpWidget(MyWidget());

// test in portrait

await binding.setSurfaceSize(Size(LANDSCAPE_WIDTH, LANDSCAPE_HEIGHT));
await tester.pumpAndSettle();

// OrientationBuilder gets triggered

// test in landscape

Jorge Wander Santana Ureña 5 年前

您可以尝试此小部件来测试您的小部件实时更改屏幕大小

https://pub.dev/packages/screen_size_test

预览

演示 https://dartpad.dartlang.org/43d9c47a8bf031ce3ef2f6314c9dbd52

代码示例

import 'package:screen_size_test/screen_size_test.dart';
...
MaterialApp(
  title: 'Demo',
  builder: (context, child) => ScreenSizeTest(
    child: child,
  ),
  home: Scaffold(
    body: ListView(
      children: List.generate(
          20,
          (index) => Container(
                padding: EdgeInsets.all(10),
                child: Placeholder(),
              )),
    ),
  ),
)

Jordan Davies 7 年前

MediaQuery 控件并设置大小。

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  Widget makeTestableWidget({Widget child, Size size}) {
    return MaterialApp(
      home: MediaQuery(
        data: MediaQueryData(size: size),
        child: child,
      ),
    );
  }

  testWidgets("tablet", (tester) async {
    final testableWidget = makeTestableWidget(
      child: WidgetUnderTest(),
      size: Size(1024, 768),
    );

    ...
  });

  testWidgets("phone", (tester) async {
    final testableWidget = makeTestableWidget(
      child: WidgetUnderTest(),
      size: Size(375, 812),
    );

    ...
  });
}