TextPainter.getPositionForOffset returns different values when run on web tests #125582
Description
Is there an existing issue for this?
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Info
When tests are run on the web TextPainter.getPositionForOffset returns different values for the same given Offset when compared to other platforms.
Steps to Reproduce
Placing the following test in test/rendering/paragraph_test.dart fails when run with flutter test test/rendering/paragraph_test.dart --platform=chrome. This test also passes when using --web-renderer=canvaskit but fails with skwasm and html. This test passes on other platforms when run with flutter test test/rendering/paragraph_test.dart.
Offset textOffsetToPosition(RenderParagraph paragraph, int offset) {
const Rect caret = Rect.fromLTWH(0.0, 0.0, 2.0, 20.0);
final Offset localOffset = paragraph.getOffsetForCaret(TextPosition(offset: offset), caret);
return paragraph.localToGlobal(localOffset);
}
test('getWordBoundary control test failing', () {
final RenderParagraph paragraph = RenderParagraph(
const TextSpan(text: 'How are you?'),
textDirection: TextDirection.ltr,
);
layout(paragraph);
final Offset target4 = textOffsetToPosition(paragraph, 4);
final TextPosition position4 = paragraph.getPositionForOffset(target4);
expect(position4, TextPosition(offset: 4));
final TextRange range4 = paragraph.getWordBoundary(position4);
expect(range4.textInside('How are you?'), equals('are'));
});Expected results
Test passes on all platforms.
Actual results
Test fails on web with skwasm and html renderers. Returns TextPosition(4, upstream) and other platforms return TextPosition(4, downstream).
Flutter Doctor output
Doctor output
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! Flutter version 3.10.0-15.0.pre.34 on channel unknown at /Users/roliv/flutter
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• Framework revision e1844791cf (25 hours ago), 2023-04-25 12:23:16 -0700
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