add tests for rect_crop_area_clipper

test/widget/circle_crop_area_clipper_test.dart

@@ -1,5 +1,5 @@
 import 'package:crop_your_image/src/widget/circle_crop_area_clipper.dart';
-import 'package:flutter/widgets.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
@@ -24,7 +24,7 @@ void main() {
               child: ClipPath(
                 clipper: CircleCropAreaClipper(Rect.fromLTWH(50, 50, 100, 100)),
                 child: ColoredBox(
-                  color: Color(0xFF0000FF),
+                  color: Colors.grey,
                 ),
               ),
             ),
@@ -34,7 +34,7 @@ void main() {
         await expectLater(
           find.byType(RepaintBoundary),
           matchesGoldenFile(
-              'circle_crop_area_clipper.viewportSizex200.crop_center.png'),
+              'circle_crop_area_clipper.viewportSize200x200.crop_center.png'),
         );
       },
     );

test/widget/rect_crop_area_clipper_test.dart

@@ -0,0 +1,90 @@
+import 'package:crop_your_image/src/widget/rect_crop_area_clipper.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  test('shouldReclip is always true', () {
+    final oldClipper = CropAreaClipper(Rect.fromLTWH(50, 50, 100, 100), 0);
+    final clipper = CropAreaClipper(Rect.fromLTWH(50, 50, 100, 100), 0);
+
+    expect(clipper.shouldReclip(oldClipper), true);
+  });
+
+  group('when viewport is 200 x 200', () {
+    final viewportSize = 200.0;
+    testWidgets(
+      'CropAreaClipper clips center with 100x100 size of rectangular shape'
+      'if passing Rect.fromLTWH(50, 50, 100, 100)',
+      (WidgetTester tester) async {
+        await tester.pumpWidget(
+          _ViewportWidget(
+            size: viewportSize,
+            targetWidget: RepaintBoundary(
+              child: ClipPath(
+                clipper: CropAreaClipper(Rect.fromLTWH(50, 50, 100, 100), 0),
+                child: ColoredBox(
+                  color: Colors.grey,
+                ),
+              ),
+            ),
+          ),
+        );
+
+        await expectLater(
+          find.byType(RepaintBoundary),
+          matchesGoldenFile(
+            'rect_crop_area_clipper.viewportSize200x200.crop_center.png',
+          ),
+        );
+      },
+    );
+
+    testWidgets(
+      'CropAreaClipper clips center with 100x100 size of rectangular shape with rounded corners'
+      'if passing Rect.fromLTWH(50, 50, 100, 100) and radius: 20',
+      (WidgetTester tester) async {
+        await tester.pumpWidget(
+          _ViewportWidget(
+            size: viewportSize,
+            targetWidget: RepaintBoundary(
+              child: ClipPath(
+                clipper: CropAreaClipper(Rect.fromLTWH(50, 50, 100, 100), 20),
+                child: ColoredBox(
+                  color: Colors.grey,
+                ),
+              ),
+            ),
+          ),
+        );
+
+        await expectLater(
+          find.byType(RepaintBoundary),
+          matchesGoldenFile(
+            'rect_crop_area_clipper.viewportSize200x200.crop_center_radius20.png',
+          ),
+        );
+      },
+    );
+  });
+}
+
+class _ViewportWidget extends StatelessWidget {
+  const _ViewportWidget({
+    required this.size,
+    required this.targetWidget,
+  });
+
+  final double size;
+  final RepaintBoundary targetWidget;
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: SizedBox(
+        width: size,
+        height: size,
+        child: targetWidget,
+      ),
+    );
+  }
+}