test: share cursor painting recorders

flutter/test/cursor_paint_scale_test.dart

@@ -4,13 +4,14 @@ import 'dart:ui' as ui;
 import 'package:flutter/widgets.dart';
 import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/desktop/pages/remote_page.dart';
-import 'package:flutter_hbb/models/desktop_render_texture.dart';
 import 'package:flutter_hbb/models/model.dart';
 import 'package:flutter_hbb/utils/image.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 
+import 'cursor_test_utils.dart';
+
 const _hotspot = Offset(4, 9);
 const _remotePosition = Offset(100.25, 80.75);
 const _canvasOffset = Offset(15.125, -10.25);
@@ -54,11 +55,6 @@ class _ImageModel extends ChangeNotifier implements ImageModel {
   dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
-class _TextureModel extends Fake implements TextureModel {
-  @override
-  RxInt getTextureId(int display) => 0.obs;
-}
-
 class _Display extends Display {
   _Display(this.scale, double left) {
     x = left;
@@ -90,7 +86,7 @@ class _FFI extends Fake implements FFI {
   @override
   final _Peer ffiModel = _Peer();
   @override
-  final textureModel = _TextureModel();
+  final textureModel = CursorTestTexture();
   @override
   late CanvasModel canvasModel;
 }
@@ -145,19 +141,6 @@ class _ScrollbarCanvasModel extends _CanvasModel {
   double get scrollY => _ffi.ffiModel.rect.height * scale > size.height ? 0.2 : 0;
 }
 
-class _Canvas extends Fake implements Canvas {
-  double factor = 1;
-  Offset? position;
-
-  @override
-  void scale(double sx, [double? sy]) => factor *= sx;
-
-  @override
-  void drawImage(ui.Image image, Offset offset, Paint paint) {
-    position = offset * factor;
-  }
-}
-
 Future<ImagePainter> _paintCursor(WidgetTester tester, CanvasModel canvas,
     {double dpr = 2, bool zoom = true, (int, int) source = (48, 64),
     Offset position = _remotePosition, double density = 0}) async {
@@ -257,7 +240,7 @@ void main() {
       var imageOrigin = texture
           ? tester.getTopLeft(find.byType(Texture).first) : _canvasOffset;
       if (!texture) {
-        final background = _Canvas();
+        final background = CursorTestDraw();
         ImagePainter(
           image: painter.image,
           x: _canvasOffset.dx / canvasScale,
@@ -270,7 +253,7 @@ void main() {
       final hotspot = (Offset(painter.x, painter.y) + _hotspot) * scale;
       expect(hotspot.dx, closeTo(target.dx, 1e-9));
       expect(hotspot.dy, closeTo(target.dy, 1e-9));
-      final canvas = _Canvas();
+      final canvas = CursorTestDraw();
       painter.paint(canvas, _viewport);
       final position = canvas.position! + _hotspot * canvas.factor;
       expect(position.dx, closeTo(target.dx, 1e-9));

flutter/test/cursor_scroll_edge_test.dart

@@ -3,7 +3,6 @@ import 'dart:ui' as ui;
 import 'package:flutter/widgets.dart';
 import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/desktop/pages/remote_page.dart';
-import 'package:flutter_hbb/models/desktop_render_texture.dart';
 import 'package:flutter_hbb/models/model.dart';
 import 'package:flutter_hbb/utils/image.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -12,6 +11,8 @@ import 'package:provider/provider.dart';
 import 'package:uuid/uuid.dart';
 import 'package:vector_math/vector_math.dart' show Vector2;
 
+import 'cursor_test_utils.dart';
+
 const _viewport = Size(200, 160);
 const _hotspot = Offset(4, 9);
 const _scrollDeltas = [80.0, -20.0, 1000.0, 1000.0, -1000.0, -1000.0, 80.0, 0.0];
@@ -41,11 +42,6 @@ class _Image extends ImageModel {
   final bool useTextureRender;
 }
 
-class _Texture extends Fake implements TextureModel {
-  @override
-  RxInt getTextureId(int display) => 0.obs;
-}
-
 class _ScrollCanvas extends CanvasModel {
   _ScrollCanvas(FFI ffi, String style, this.scrollStyle)
       : viewStyle = ViewStyle(
@@ -117,17 +113,7 @@ class _FFI extends Fake implements FFI {
   @override
   late final CursorModel cursorModel;
   @override
-  final textureModel = _Texture();
-}
-
-class _Draw extends Fake implements Canvas {
-  double factor = 1;
-  Offset? position;
-  @override
-  void scale(double sx, [double? sy]) => factor *= sx;
-  @override
-  void drawImage(ui.Image image, Offset offset, Paint paint) =>
-      position = offset * factor;
+  final textureModel = CursorTestTexture();
 }
 
 void main() {
@@ -250,7 +236,7 @@ void _expectAlignment(WidgetTester tester, FFI ffi, Finder videoWidget) {
   final cursorWidget = _paintOf(cursor.image!);
   final painter =
       tester.widget<CustomPaint>(cursorWidget).painter! as ImagePainter;
-  final output = _Draw();
+  final output = CursorTestDraw();
   painter.paint(output, ffi.canvasModel.size);
   final hotspot = tester.getTopLeft(cursorWidget) +
       output.position! +
@@ -258,7 +244,7 @@ void _expectAlignment(WidgetTester tester, FFI ffi, Finder videoWidget) {
   var videoOrigin = tester.getTopLeft(videoWidget);
   final video = tester.widget(videoWidget);
   if (video is CustomPaint) {
-    final drawnVideo = _Draw();
+    final drawnVideo = CursorTestDraw();
     video.painter!.paint(drawnVideo, ffi.canvasModel.size);
     videoOrigin += drawnVideo.position!;
   }

flutter/test/cursor_test_utils.dart

@@ -3,6 +3,7 @@ import 'dart:ui' as ui;
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_hbb/common.dart' as common;
+import 'package:flutter_hbb/models/desktop_render_texture.dart';
 import 'package:flutter_hbb/models/input_model.dart';
 import 'package:flutter_hbb/models/model.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -109,3 +110,18 @@ img.Image decodeNativeCursorRaster(Map<dynamic, dynamic> args) {
           order: img.ChannelOrder.bgra)
       : img.decodePng(bytes)!;
 }
+
+class CursorTestTexture extends Fake implements TextureModel {
+  @override
+  RxInt getTextureId(int display) => 0.obs;
+}
+
+class CursorTestDraw extends Fake implements Canvas {
+  double factor = 1;
+  Offset? position;
+  @override
+  void scale(double sx, [double? sy]) => factor *= sx;
+  @override
+  void drawImage(ui.Image image, Offset offset, Paint paint) =>
+      position = offset * factor;
+}