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Keep browser cursor validation coverage in the existing Web fixture

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fufesou
2026-09-14 10:43:05 +08:00
parent 2d5d11282b
commit 8f499c2eb5
2 changed files with 42 additions and 108 deletions
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42
flutter/test/cursor_web_test.dart
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@@ -24,6 +24,7 @@ void main() {
TestWidgetsFlutterBinding.ensureInitialized();
_alphaTests();
_thinCursorTests();
_sourceValidationTests();
for (final style in [kRemoteViewStyleAdaptive, kRemoteViewStyleCustom]) {
for (final dpr in [1.0, 2.0]) {
for (final (platform, density) in [
@@ -64,6 +65,47 @@ void main() {
});
}
void _sourceValidationTests() {
const side = 48;
const sourceLimit = 4096;
const bytes = side * side * 4;
for (final density in [null, 4.0]) {
test('Web rejects invalid cursor sources and recovers, density=$density', () async {
final canvas = CursorTestCanvas(1, style: kRemoteViewStyleAdaptive, scale: 1);
addTearDown(canvas.dispose);
final cursor = await _loadCursor(CursorTestFFI(canvas), 'source-$density',
source: (side, side), pixelRatio: density);
final cache = cursor.cache;
final image = cursor.image;
final event = {
'id': 'source-$density', 'width': '$side', 'height': '$side',
'hotx': '7', 'hoty': '9',
if (density != null) 'scale': '$density',
'colors': jsonEncode(List<int>.filled(bytes, 255)),
};
// Invalid JSON proves geometry is checked before decoding or allocation.
const invalidPixels = 'must not decode an invalid source size';
for (final invalid in [
{'colors': '[1,2,3,4]'},
{'colors': jsonEncode(List<int>.filled(bytes + 1, 255))},
{'width': '0', 'colors': invalidPixels},
{'height': '-1', 'colors': invalidPixels},
{'width': '${sourceLimit * 4}', 'height': '${sourceLimit * 4}',
'colors': invalidPixels},
{'scale': '1e-300'},
{'scale': '0.001'},
]) {
await cursor.updateCursorData({...event, ...invalid});
expect(cursor.cache, same(cache));
expect(cursor.image, same(image));
expect((cursor.hotx, cursor.hoty), (7, 9));
}
await cursor.updateCursorData(event);
expect(cursor.cache, isNot(same(cache)));
});
}
}
void _thinCursorTests() {
for (final style in [kRemoteViewStyleAdaptive, kRemoteViewStyleCustom]) {
for (final zoom in [false, true]) {