102 lines
3.2 KiB
Dart
102 lines
3.2 KiB
Dart
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// Device-independent widget test of the eraser path (the user reported eraser
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// reliability issues). A stylus drag through a committed stroke in eraser mode
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// must fire onEraseStroke for that stroke.
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import 'package:flutter/gestures.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:badnote/editor/canvas/pen_canvas.dart';
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import 'package:badnote/editor/canvas/pen_stroke.dart';
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void main() {
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const pageSize = Size(400, 600);
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// A horizontal stroke through the normalized center (0.5, 0.5).
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PenStroke centerStroke() => PenStroke(
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points: const [
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PenPoint(0.4, 0.5, 0.5),
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PenPoint(0.5, 0.5, 0.5),
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PenPoint(0.6, 0.5, 0.5),
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],
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color: 0xFF000000,
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width: 0.004,
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kind: PenStrokeKind.pen,
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);
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Widget host({
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required List<PenStroke> strokes,
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required void Function(int, List<PenStroke>) onErase,
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required TransformationController controller,
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}) =>
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MaterialApp(
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home: Scaffold(
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body: Center(
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child: SizedBox(
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width: pageSize.width,
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height: pageSize.height,
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child: PenCanvas(
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pageWidget: Container(color: const Color(0xFFEEEEEE)),
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pageSize: pageSize,
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strokes: strokes,
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transformationController: controller,
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tool: CanvasTool.eraser,
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color: const Color(0xFF000000),
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strokeWidth: 0.004,
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onStrokeComplete: (_) {},
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onEraseStroke: onErase,
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),
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),
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),
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),
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);
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testWidgets('eraser tool: a stylus pass over a stroke fires onEraseStroke',
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(tester) async {
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final erased = <int>[];
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final controller = TransformationController();
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addTearDown(controller.dispose);
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await tester.pumpWidget(host(
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strokes: [centerStroke()],
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onErase: (i, _) => erased.add(i),
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controller: controller,
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));
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// Drag a stylus vertically through the screen center (= normalized 0.5,0.5,
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// where the stroke sits).
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final center = tester.getCenter(find.byType(PenCanvas));
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final g = await tester.startGesture(center + const Offset(0, -20),
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kind: PointerDeviceKind.stylus);
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await g.moveBy(const Offset(0, 20));
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await g.moveBy(const Offset(0, 20));
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await g.up();
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await tester.pump();
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expect(erased, contains(0), reason: 'the center stroke should be erased');
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});
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testWidgets('eraser tool: a pass far from any stroke erases nothing',
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(tester) async {
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final erased = <int>[];
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final controller = TransformationController();
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addTearDown(controller.dispose);
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await tester.pumpWidget(host(
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strokes: [centerStroke()],
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onErase: (i, _) => erased.add(i),
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controller: controller,
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));
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// Drag in the top-left corner, far from the centered stroke.
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final topLeft = tester.getTopLeft(find.byType(PenCanvas));
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final g = await tester.startGesture(topLeft + const Offset(10, 10),
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kind: PointerDeviceKind.stylus);
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await g.moveBy(const Offset(5, 5));
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await g.up();
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await tester.pump();
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expect(erased, isEmpty);
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});
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}
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