Make TestingExplorerView widget navigatable

Author: hsfzxjy

src/vs/workbench/contrib/testing/browser/testingExplorerView.ts

@@ -71,6 +71,7 @@ import { ITestingPeekOpener } from 'vs/workbench/contrib/testing/common/testingP
 import { cmpPriority, isFailedState, isStateWithResult } from 'vs/workbench/contrib/testing/common/testingStates';
 import { IActivityService, NumberBadge } from 'vs/workbench/services/activity/common/activity';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
+import { registerNavigatableContainer } from 'vs/workbench/browser/actions/widgetNavigationCommands';
 
 const enum LastFocusState {
 	Input,
@@ -248,6 +249,23 @@ export class TestingExplorerView extends ViewPane {
 		return { include: [...include], exclude };
 	}
 
+	override render(): void {
+		super.render();
+		this._register(registerNavigatableContainer({
+			focusNotifiers: [this],
+			focusNextWidget: () => {
+				if (!this.viewModel.tree.isDOMFocused()) {
+					this.viewModel.tree.domFocus();
+				}
+			},
+			focusPreviousWidget: () => {
+				if (this.viewModel.tree.isDOMFocused()) {
+					this.filter.value?.focus();
+				}
+			}
+		}));
+	}
+
 	/**
 	 * @override
 	 */