From 896e5b332d364cbe407966787115ce6cc4e6dde4 Mon Sep 17 00:00:00 2001
From: fzyzcjy <5236035+fzyzcjy@users.noreply.github.com>
Date: Wed, 4 May 2022 07:04:07 +0800
Subject: [PATCH] (Test-only) Add tests for new
 `ImageFilter.dilate`/`ImageFilter.erode` in flutter engine (#101036)

---
 .../test/widgets/image_filter_test.dart       | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/packages/flutter/test/widgets/image_filter_test.dart b/packages/flutter/test/widgets/image_filter_test.dart
index 6395cb044ed..94748798112 100644
--- a/packages/flutter/test/widgets/image_filter_test.dart
+++ b/packages/flutter/test/widgets/image_filter_test.dart
@@ -9,6 +9,7 @@
 import 'dart:typed_data';
 import 'dart:ui';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -29,6 +30,37 @@ void main() {
     );
   });
 
+  testWidgets('Image filter - dilate', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      RepaintBoundary(
+        child: ImageFiltered(
+          imageFilter: ImageFilter.dilate(radiusX: 10.0, radiusY: 10.0),
+          child: const Placeholder(),
+        ),
+      ),
+    );
+    await expectLater(
+      find.byType(ImageFiltered),
+      matchesGoldenFile('image_filter_dilate.png'),
+    );
+  }, skip: kIsWeb); // https://github.com/flutter/flutter/issues/101874
+
+  testWidgets('Image filter - erode', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      RepaintBoundary(
+        child: ImageFiltered(
+          // Do not erode too much, otherwise we will see nothing left.
+          imageFilter: ImageFilter.erode(radiusX: 1.0, radiusY: 1.0),
+          child: const Placeholder(strokeWidth: 4),
+        ),
+      ),
+    );
+    await expectLater(
+      find.byType(ImageFiltered),
+      matchesGoldenFile('image_filter_erode.png'),
+    );
+  }, skip: kIsWeb); // https://github.com/flutter/flutter/issues/101874
+
   testWidgets('Image filter - matrix', (WidgetTester tester) async {
     final ImageFilter matrix = ImageFilter.matrix(Float64List.fromList(<double>[
       0.5, 0.0, 0.0, 0.0, //