Test cover 'toImage'.

lib/web_ui/test/canvaskit/image_test.dart

@@ -0,0 +1,37 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+
+import 'package:test/bootstrap/browser.dart';
+import 'package:test/test.dart';
+import 'package:ui/src/engine.dart';
+import 'package:ui/ui.dart' as ui;
+
+import 'common.dart';
+
+void main() {
+  internalBootstrapBrowserTest(() => testMain);
+}
+
+void testMain() {
+  setUpCanvasKitTest();
+
+  test('toImage succeeds', () async {
+    final ui.Image image = await _createImage();
+    expect(image.runtimeType.toString(), equals('CkImage'));
+    image.dispose();
+  // TODO(hterkelsen): https://github.com/flutter/flutter/issues/109265
+  }, skip: isFirefox);
+}
+
+Future<ui.Image> _createImage() => _createPicture().toImage(10, 10);
+
+ui.Picture _createPicture() {
+  final ui.PictureRecorder recorder = ui.PictureRecorder();
+  final ui.Canvas canvas = ui.Canvas(recorder);
+  const ui.Rect rect = ui.Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
+  canvas.clipRect(rect);
+  return recorder.endRecording();
+}

lib/web_ui/test/engine/image/image_test.dart

@@ -0,0 +1,32 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:test/bootstrap/browser.dart';
+import 'package:test/test.dart';
+import 'package:ui/ui.dart' as ui;
+
+void main() {
+  internalBootstrapBrowserTest(() => testMain);
+}
+
+Future<void> testMain() async {
+
+  test('toImage succeeds', () async {
+    final ui.Image image = await _createImage();
+    expect(image.runtimeType.toString(), equals('HtmlImage'));
+    image.dispose();
+  // TODO(polina-c): unskip the test when bug is fixed:
+  // https://github.com/flutter/engine/pull/35791
+  }, skip: true);
+}
+
+Future<ui.Image> _createImage() => _createPicture().toImage(10, 10);
+
+ui.Picture _createPicture() {
+  final ui.PictureRecorder recorder = ui.PictureRecorder();
+  final ui.Canvas canvas = ui.Canvas(recorder);
+  const ui.Rect rect = ui.Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
+  canvas.clipRect(rect);
+  return recorder.endRecording();
+}

testing/dart/BUILD.gn

@@ -25,6 +25,7 @@ tests = [
   "image_filter_test.dart",
   "image_resize_test.dart",
   "image_shader_test.dart",
+  "image_test.dart",
   "isolate_name_server_test.dart",
   "isolate_test.dart",
   "lerp_test.dart",

testing/dart/image_test.dart

@@ -0,0 +1,26 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+import 'dart:ui';
+
+import 'package:litetest/litetest.dart';
+
+void main() {
+  test('toImage succeeds', () async {
+    final Image image = await _createImage();
+    expect(image.runtimeType.toString(), equals('Image'));
+    image.dispose();
+  });
+}
+
+Future<Image> _createImage() => _createPicture().toImage(10, 10);
+
+Picture _createPicture() {
+  final PictureRecorder recorder = PictureRecorder();
+  final Canvas canvas = Canvas(recorder);
+  const Rect rect = Rect.fromLTWH(0.0, 0.0, 100.0, 100.0);
+  canvas.clipRect(rect);
+  return recorder.endRecording();
+}