testWidgets('InputDecorator does not crash at zero area', (WidgetTester tester) async {
    // Test with default UnderlineInputBorder
    await tester.pumpWidget(
      const MaterialApp(
        home: Scaffold(
          body: Center(
            child: SizedBox.shrink(child: InputDecorator(decoration: InputDecoration())),
          ),
        ),
      ),
    );
    expect(tester.getSize(find.byType(InputDecorator)), Size.zero);

    // Test with OutlineInputBorder as mentioned in the original issue.
    await tester.pumpWidget(
      const MaterialApp(
        home: Scaffold(
          body: Center(
            child: SizedBox.shrink(
              child: InputDecorator(
                decoration: InputDecoration(
                  border: OutlineInputBorder(),
                ),
              ),
            ),
          ),
        ),
      ),
    );
    expect(tester.getSize(find.byType(InputDecorator)), Size.zero);
  });