WidgetTester RichEdit Extension - find a piece of text, e.g. tap a link in the text

widget_tester_rich_edit.dart

/// found nothing better than this
/// https://github.com/flutter/flutter/blob/master/packages/flutter/test/widgets/hyperlink_test.dart#L47
/// sooo...
extension WidgetTesterRichEditExtension on WidgetTester {
  Iterable<InlineSpan> findTextSpans(
      Finder richTextFinder, bool Function(InlineSpan) predicate) {
    final richText = widget<RichText>(richTextFinder);
    expect(richText.text, isInstanceOf<TextSpan>());
    final TextSpan innerText = richText.text;
    return innerText.children.where(predicate);
  }
}

/// then
void findALinkAnTapIt(WidgetTester tester) async {
  final richTextFinder = find.byKey(ValueKey("myKey"));
  final spans = tester.findTextSpans(
            richTextFinder,
            (inlineSpan) =>
                inlineSpan is TextSpan &&
                inlineSpan.recognizer is TapGestureRecognizer);
  final TextSpan = spans.first;
  expect(spans, hasLength(1));
  final TextSpan linkSpan = spans.first;
  final TapGestureRecognizer recognizer = linkSpan.recognizer;
  recognizer.onTap();
}