Add scene reload test

Author: bdero

lib/ui/BUILD.gn

@@ -216,6 +216,10 @@ if (enable_unittests) {
       "fixtures/FontManifest.json",
       "//flutter/third_party/txt/third_party/fonts/Roboto-Medium.ttf",
     ]
+
+    if (impeller_enable_3d) {
+      deps += [ "//flutter/impeller/fixtures:scene_fixtures" ]
+    }
   }
 
   executable("ui_benchmarks") {

testing/dart/observatory/BUILD.gn

@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//flutter/impeller/tools/impeller.gni")
 import("//flutter/testing/dart/compile_test.gni")
 
 tests = [
@@ -11,6 +12,10 @@ tests = [
   "vmservice_methods_test.dart",
 ]
 
+if (impeller_enable_3d) {
+  tests += [ "scene_reload_test.dart" ]
+}
+
 foreach(test, tests) {
   compile_flutter_dart_test("compile_$test") {
     dart_file = test

testing/dart/observatory/README.md

@@ -2,4 +2,4 @@ Tests in this folder need to be run with the observatory enabled, e.g. to make
 VM service method calls.
 
 The `run_tests.py` script disables the observatory for other tests in the
-parent directory.
+parent directory.

testing/dart/observatory/scene_reload_test.dart

@@ -0,0 +1,63 @@
+// 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:developer' as developer;
+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:litetest/litetest.dart';
+import 'package:vm_service/vm_service.dart' as vms;
+import 'package:vm_service/vm_service_io.dart';
+
+void main() {
+  test('ipscenes can be re-initialized', () async {
+    vms.VmService? vmService;
+    SceneShader? shader;
+    try {
+      final Float64List transform = Float64List(16);
+      transform[0] = 1.0; // Scale X
+      transform[5] = 1.0; // Scale Y
+      transform[10] = 1.0; // Scale Z
+      transform[12] = 2.0; // Translation X
+      transform[13] = 6.0; // Translation Y
+      transform[14] = 6.0; // Translation Z
+      transform[15] = 1.0;
+      final SceneNode sceneNode = await SceneNode.fromAsset(
+        'flutter_logo.glb.ipscene',
+      )..setTransform(transform);
+      shader = sceneNode.sceneShader();
+      _use(shader);
+
+      final developer.ServiceProtocolInfo info = await developer.Service.getInfo();
+
+      if (info.serverUri == null) {
+        fail('This test must not be run with --disable-observatory.');
+      }
+
+      vmService = await vmServiceConnectUri(
+        'ws://localhost:${info.serverUri!.port}${info.serverUri!.path}ws',
+      );
+      final vms.VM vm = await vmService.getVM();
+
+      expect(vm.isolates!.isNotEmpty, true);
+      for (final vms.IsolateRef isolateRef in vm.isolates!) {
+        final vms.Response response = await vmService.callServiceExtension(
+          'ext.ui.window.reinitializeScene',
+          isolateId: isolateRef.id,
+          args: <String, Object>{
+            'assetKey': 'flutter_logo.glb.ipscene',
+          },
+        );
+        expect(response.type == 'Success', true);
+      }
+    } finally {
+      await vmService?.dispose();
+      shader?.dispose();
+    }
+  });
+}
+
+void _use(Shader shader) {
+
+}