29 lines
846 B
Dart
29 lines
846 B
Dart
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import 'dart:ui';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:badnote/editor/engine/stroke_predictor.dart';
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void main() {
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test('StrokePredictor projects ahead when velocity is high', () {
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final p = StrokePredictor(lookaheadMs: 16);
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final t0 = DateTime.utc(2026, 1, 1, 0, 0, 0, 0);
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expect(p.observe(const Offset(0, 0), 0.5, at: t0), isNull);
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final tip = p.observe(
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const Offset(10, 0),
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0.5,
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at: t0.add(const Duration(milliseconds: 8)),
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);
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// 10px / 8ms ≈ 1250 px/s → 16ms lookahead ≈ 20px ahead
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expect(tip, isNotNull);
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expect(tip!.offset.dx, greaterThan(10));
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});
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test('StrokePredictor resets cleanly', () {
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final p = StrokePredictor();
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p.observe(const Offset(0, 0), 0.4);
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p.reset();
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expect(p.observe(const Offset(1, 1), 0.4), isNull);
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});
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}
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