flutter - 查找 TextSpan 以使用 Flutter 测试

Question

使用 Flutter WidgetTester 如何点击 TextSpan，如下面的代码所示？

RichText(
  text: TextSpan(
    children: [
      TextSpan(text: 'aaa '),
      TextSpan(
        text: 'bbb ',
        recognizer: TapGestureRecognizer()
          ..onTap = () { 
            // How to reach this code in a widget test?
          },
      ),
      TextSpan(text: 'ccc'),
    ],
  ),
)

Answer 1

CommonFinders byWidgetPredicate method

InlineSpan visitChildren method

找到 TextSpan:

final finder = find.byWidgetPredicate(
  (widget) => widget is RichText && tapTextSpan(widget, "bbb "),
);

bool findTextAndTap(InlineSpan visitor, String text) {
  if (visitor is TextSpan && visitor.text == text) {
    (visitor.recognizer as TapGestureRecognizer).onTap();

    return false;
  }

  return true;
}

bool tapTextSpan(RichText richText, String text) {
  final isTapped = !richText.text.visitChildren(
    (visitor) => findTextAndTap(visitor, text),
  );

  return isTapped;
}