47 lines
1.5 KiB
Dart
47 lines
1.5 KiB
Dart
import "dart:io";
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import "dart:typed_data";
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import "dart:ui" as ui;
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import "package:custom_cursor/custom_cursor.dart";
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import "package:flutter_test/flutter_test.dart";
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/// Regression coverage for the curated `broken-cursors` corpus.
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///
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/// The remaining fixtures are classic monochrome Windows cursors whose shapes
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/// were encoded as "screen invert" pixels (an all-set AND mask with the XOR
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/// mask carving out the glyph). The decoder used to drop those pixels,
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/// producing fully transparent (invisible) cursors; they become visible once
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/// the invert pixels are rendered opaque.
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void main() {
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Uint8List bytesOf(String path) {
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final file = File(path);
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return file.existsSync()
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? file.readAsBytesSync()
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: fail("missing fixture $path");
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}
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Future<int> opaqueCount(ui.Image image) async {
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final data = await image.toByteData(format: ui.ImageByteFormat.rawRgba);
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final bytes = data!.buffer.asUint8List();
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var opaque = 0;
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for (var i = 0; i < bytes.length; i += 4) {
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if (bytes[i + 3] != 0) opaque++;
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}
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return opaque;
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}
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Cursor firstFrame(CursorAsset asset) => switch (asset) {
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StaticCursor(:final cursor) => cursor,
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AnimatedCursorAsset(:final cursor) => cursor.frames.first,
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};
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test("reference cursors decode", () async {
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for (final name in ["normal", "move", "resize"]) {
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final asset = await decodeCursorAsset(
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bytesOf("example/assets/cursors/$name.cur"),
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);
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expect(await opaqueCount(firstFrame(asset).image), greaterThan(0));
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}
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});
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}
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