flutter test_error ai_generated true

TestFailure: Golden 图像尺寸不匹配：期望 1080x1920，实际 720x1280

TestFailure: Golden image dimensions do not match: expected 1080x1920, actual 720x1280

ID: flutter/golden-test-image-size-mismatch

其他格式: JSON · Markdown 中文 · English
85%修复率
88%置信度
1证据数
2023-07-12首次发现

版本兼容性

版本状态引入弃用备注
Flutter 3.10.0 active — — —
Flutter 3.19.0 active — — —
Dart 3.0.0 active — — —

根因分析

用于图像比较的 golden 文件与渲染的小部件尺寸不同，通常是由于屏幕尺寸、小部件布局或测试设备配置发生变化。

English

The golden file used for image comparison has different dimensions than the rendered widget, often due to a change in screen size, widget layout, or test device configuration.

generic

官方文档

https://docs.flutter.dev/testing/golden-testing

解决方案

  1. 通过使用 '--update-goldens' 标志运行测试来重新生成 golden 文件。示例：
  flutter test --update-goldens test/widget_test.dart
这将用当前渲染输出覆盖 golden 文件。
  2. 确保测试小部件以与 golden 相同的尺寸渲染。在测试中，使用以下方法设置固定表面尺寸：
  testWidgets('golden test', (tester) async {
    await tester.binding.setSurfaceSize(Size(1080, 1920));
    await tester.pumpWidget(MyWidget());
    await expectLater(find.byType(MyWidget), matchesGoldenFile('golden.png'));
  });
  3. 检查可能改变小部件尺寸的响应式布局更改；在测试中使用固定大小的 SizedBox 包装小部件以匹配 golden。

无效尝试

常见但无效的做法:

  1. Update the golden file manually by copying the actual output to the golden directory 60% 失败

    If the layout change is unintended, copying the output introduces a false positive; the test passes but the UI is broken.

  2. Set a fixed screen size in the test using TestWidgetsFlutterBinding 50% 失败

    Fixing the screen size may not match the golden's expected dimensions; the dimensions must align exactly.

  3. Use 'matchGoldenFile' with a tolerance parameter to ignore size differences 80% 失败

    The 'matchGoldenFile' method does not have a tolerance parameter for dimensions; it only compares pixel data after resizing, which can cause blurry comparisons.