notebook webview test

extensions/vscode-notebook-tests/src/customRenderer.js

@@ -0,0 +1,13 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+const vscode = acquireVsCodeApi();
+
+vscode.postMessage({
+	type: 'custom_renderer_initialize',
+	payload: {
+		firstMessage: true
+	}
+});