35 lines
1.2 KiB
Dart
35 lines
1.2 KiB
Dart
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// Tests for tipVelocityWidthScale (physical tip model).
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import 'package:flutter_test/flutter_test.dart';
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import 'package:badnote/editor/engine/brush.dart';
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import 'package:badnote/editor/engine/pen_physics.dart';
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void main() {
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group('tipVelocityWidthScale', () {
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test('idle speed leaves all brushes at 1.0', () {
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for (final k in BrushKind.values) {
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expect(tipVelocityWidthScale(k, 0.0), closeTo(1.0, 1e-9));
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}
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});
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test('fountain thins more than ballpoint at the same speed', () {
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const speed = 2.0; // reference fast handwriting
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final fountain = tipVelocityWidthScale(BrushKind.fountainPen, speed);
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final ballpoint = tipVelocityWidthScale(BrushKind.ballpoint, speed);
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expect(fountain, closeTo(0.85, 1e-9));
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expect(ballpoint, closeTo(0.98, 1e-9));
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expect(fountain, lessThan(ballpoint));
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});
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test('highlighter ignores velocity', () {
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expect(tipVelocityWidthScale(BrushKind.highlighter, 5.0), 1.0);
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});
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test('NaN / negative speed treated as idle', () {
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expect(tipVelocityWidthScale(BrushKind.fountainPen, double.nan), 1.0);
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expect(tipVelocityWidthScale(BrushKind.fountainPen, -1.0), 1.0);
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});
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});
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}
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