fix tests

src/vs/workbench/services/views/browser/viewDescriptorService.ts

@@ -223,7 +223,7 @@ export class ViewDescriptorService extends Disposable implements IViewDescriptor
 	) {
 		super();
 
-		storageKeysSyncRegistryService?.registerStorageKey({ key: ViewDescriptorService.CACHED_VIEW_POSITIONS, version: 1 });
+		storageKeysSyncRegistryService.registerStorageKey({ key: ViewDescriptorService.CACHED_VIEW_POSITIONS, version: 1 });
 		this.viewDescriptorCollections = new Map<ViewContainer, { viewDescriptorCollection: ViewDescriptorCollection, disposable: IDisposable; }>();
 		this.activeViewContextKeys = new Map<string, IContextKey<boolean>>();
 		this.movableViewContextKeys = new Map<string, IContextKey<boolean>>();

src/vs/workbench/test/browser/workbenchTestServices.ts

@@ -105,6 +105,7 @@ import { IListService } from 'vs/platform/list/browser/listService';
 import { win32, posix } from 'vs/base/common/path';
 import { TestWorkingCopyService, TestContextService, TestStorageService, TestTextResourcePropertiesService } from 'vs/workbench/test/common/workbenchTestServices';
 import { IViewsService, IView } from 'vs/workbench/common/views';
+import { IStorageKeysSyncRegistryService, StorageKeysSyncRegistryService } from 'vs/platform/userDataSync/common/storageKeys';
 
 export function createFileEditorInput(instantiationService: IInstantiationService, resource: URI): FileEditorInput {
 	return instantiationService.createInstance(FileEditorInput, resource, undefined, undefined);
@@ -168,6 +169,7 @@ export function workbenchInstantiationService(overrides?: { textFileService?: (i
 	instantiationService.stub(IViewletService, new TestViewletService());
 	instantiationService.stub(IListService, new TestListService());
 	instantiationService.stub(IQuickInputService, new QuickInputService(TestEnvironmentService, configService, instantiationService, keybindingService, contextKeyService, themeService, accessibilityService, layoutService));
+	instantiationService.stub(IStorageKeysSyncRegistryService, new StorageKeysSyncRegistryService());
 
 	return instantiationService;
 }