Repository: flutter
Issue: Bidi and semantics on Web
Labels: a: internationalization,a: typography,platform-web,P2,c: parity,team-web,triaged-web

The following test passes on non-Web but fails on Web:

```dart
  testWidgets('recognizers split semantic node - bidi', (WidgetTester tester) async {
    final SemanticsTester semantics = SemanticsTester(tester);
    const TextStyle textStyle = TextStyle(fontFamily: 'Ahem');
    await tester.pumpWidget(
      RichText(
        text: TextSpan(
          style: textStyle,
          children: <TextSpan>[
            const TextSpan(text: 'hello world${Unicode.RLE}${Unicode.RLO} '),
            TextSpan(
              text: 'BOY',
              recognizer: LongPressGestureRecognizer()..onLongPress = () { },
            ),
            const TextSpan(text: ' HOW DO${Unicode.PDF} you ${Unicode.RLO} DO '),
            TextSpan(
              text: 'SIR',
              recognizer: TapGestureRecognizer()..onTap = () { },
            ),
            const TextSpan(text: '${Unicode.PDF}${Unicode.PDF} good bye'),
          ],
        ),
        textDirection: TextDirection.ltr,
      ),
    );
    // The expected visual order of the text is:
    //   hello world RIS OD you OD WOH YOB good bye
    // There are five unique text areas, they are, in visual order but
    // showing the logical text:
    //   [hello world][SIR][HOW DO you DO][BOY][good bye]
    // The direction of each varies based on the first bit of that area.
    // The presence of the bidi formatting characters in the text is a
    // bit dubious, but that's what we do currently, and it's not really
    // clear what the perfect behavior would be...
    final TestSemantics expectedSemantics = TestSemantics.root(
      children: <TestSemantics>[
        TestSemantics.rootChild(
          rect: const Rect.fromLTRB(0.0, 0.0, 800.0, 600.0),
          children: <TestSemantics>[
            TestSemantics(
              rect: const Rect.fromLTRB(-4.0, -4.0, 480.0, 18.0),
              label: 'hello world${Unicode.RLE}${Unicode.RLO} ',
              textDirection: TextDirection.ltr,
            ),
            TestSemantics(
              rect: const Rect.fromLTRB(416.0, -4.0, 466.0, 18.0),
              label: 'BOY',
              textDirection: TextDirection.rtl,
              actions: <SemanticsAction>[SemanticsAction.longPress],
            ),
            TestSemantics(
              rect: const Rect.fromLTRB(192.0, -4.0, 424.0, 18.0),
              label: ' HOW DO${Unicode.PDF} you ${Unicode.RLO} DO ',
              textDirection: TextDirection.rtl,
            ),
            TestSemantics(
              rect: const Rect.fromLTRB(150.0, -4.0, 200.0, 18.0),
              label: 'SIR',
              textDirection: TextDirection.rtl,
              actions: <SemanticsAction>[SemanticsAction.tap],
              flags: <SemanticsFlag>[SemanticsFlag.isLink],
            ),
            TestSemantics(
              rect: const Rect.fromLTRB(472.0, -4.0, 606.0, 18.0),
              label: '${Unicode.PDF}${Unicode.PDF} good bye',
              textDirection: TextDirection.rtl,
            ),
          ],
        ),
      ],
    );
    expect(
      semantics,
      hasSemantics(
        expectedSemantics,
        ignoreTransform: true,
        ignoreId: true,
      ),
    );
    semantics.dispose();
  });
```

This test is in `text_test.dart` and is disabled for Web right now.

See also https://github.com/flutter/flutter/issues/44020, https://github.com/flutter/flutter/issues/42086.