80 lines
2.6 KiB
Dart
80 lines
2.6 KiB
Dart
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// Direct tests for InkPictureCache (the P0.5 perf primitive: a committed-ink
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// ui.Picture is recorded once per revision and replayed, so pinch/pan/live-move
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// frames never re-rasterize). Verifies build-once caching, revision-keyed
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// rebuild, LRU eviction, and post-frame disposal.
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import 'dart:ui' as ui;
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:badnote/editor/render/ink_picture_cache.dart';
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ui.Picture _pic() {
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final recorder = ui.PictureRecorder();
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Canvas(recorder).drawRect(
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const Rect.fromLTWH(0, 0, 1, 1),
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Paint()..color = const Color(0xFF000000),
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);
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return recorder.endRecording();
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}
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void main() {
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TestWidgetsFlutterBinding.ensureInitialized();
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const size = Size(100, 100);
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test('same (host,revision) builds once, then returns the cached Picture', () {
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final cache = InkPictureCache();
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var builds = 0;
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ui.Picture build() {
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builds++;
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return _pic();
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}
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final p1 = cache.getOrBuild('h', 3, size, build);
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final p2 = cache.getOrBuild('h', 3, size, build);
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expect(builds, 1, reason: 'second call is a cache hit');
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expect(identical(p1, p2), isTrue);
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cache.dispose();
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});
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test('a new revision rebuilds (revision is part of the key)', () {
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final cache = InkPictureCache();
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var builds = 0;
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cache.getOrBuild('h', 1, size, () { builds++; return _pic(); });
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cache.getOrBuild('h', 2, size, () { builds++; return _pic(); });
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expect(builds, 2);
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cache.dispose();
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});
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test('different host ids are independent', () {
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final cache = InkPictureCache();
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var builds = 0;
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cache.getOrBuild('a', 1, size, () { builds++; return _pic(); });
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cache.getOrBuild('b', 1, size, () { builds++; return _pic(); });
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expect(builds, 2);
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cache.dispose();
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});
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testWidgets('evicts + disposes the LRU beyond maxSize (post-frame)',
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(tester) async {
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final cache = InkPictureCache(maxSize: 2);
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final first = cache.getOrBuild('a', 1, const Size(100, 100), _pic);
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cache.getOrBuild('b', 1, const Size(100, 100), _pic);
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// Re-touch 'a' so 'b' becomes LRU.
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cache.getOrBuild('a', 1, const Size(100, 100), _pic);
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// Insert a 3rd → evicts the LRU ('b'); 'a' (first) survives.
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cache.getOrBuild('c', 1, const Size(100, 100), _pic);
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// 'a' is still cached → no rebuild.
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var rebuilt = false;
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final aAgain = cache.getOrBuild(
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'a', 1, const Size(100, 100), () { rebuilt = true; return _pic(); });
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expect(rebuilt, isFalse);
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expect(identical(aAgain, first), isTrue);
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cache.dispose();
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await tester.pump(); // run the deferred disposals
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});
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}
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