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我正在为 Flutter Web 应用程序开发 Flutter integration_tests。当我启动我的 main() 应用程序时，系统会抛出异常“ImageCodecException：无法解码图像数据”。在上述情况下，考虑到我期望出现异常，如果抛出异常，我希望测试通过。我如何断言ImageCodeException？

试过：

testWidgets('Test for invalid file upload', (WidgetTester tester) async {
      app.main();

      FlutterError.onError = (FlutterErrorDetails data) {
        if (data.exception is FlutterError) {
          final fErr = data.exception as FlutterError;
          if (fErr.message == 'Failed to decode image data.') {
            return;
          }
        }
        FlutterError.presentError(data);
      };
    });

例外：

══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞═════════════════
The following ImageCodecException was thrown resolving an image
codec:
Failed to decode image data.
Image source: encoded image bytes

我已经覆盖了FlutterError.onError确实绕过了异常..我如何断言特定ImageCodecException异常？

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