Issue with Opening Default Folder in VSCode Instance Using vscode-extension-tester

I am attempting to use the vscode-extension-tester from this tutorial: Read more. However, I am unable to set an open default folder in my VSCode instance.

Answer

It seems like there's no equivalent of setting a default folder in the vscode/test-electron environment using .vscode-test.mjs or a default workspaceFolder for the vscode-extension-tester.

What I have tried:

1. Using vscode.openFolder command in test.ts:

import \* as vscode from 'vscode';  
import \* as path from 'path';  
let uri = vscode.Uri.file('/some/path/to/folder');  
let success = await vscode.commands.executeCommand('vscode.openFolder', uri);  

• The output :

Loading mocha configuration from PATH\\.mocharc.js  
Error: Cannot find module 'vscode'  
Require stack:  
\-  PATH\\out\\ui-test\\CreateProject.test.js  
\-  PATH\\node_modules\\mocha\\lib\\mocha.js  
\-  PATH\\node_modules\\mocha\\index.js  
\-  PATH\\node_modules\\vscode-extension-tester\\out\\suite\\runner.js  
\-  PATH\\node_modules\\vscode-extension-tester\\out\\util\\codeUtil.js  
\-  PATH\\node_modules\\vscode-extension-tester\\out\\extester.js  
\-  PATH\\node_modules\\vscode-extension-tester\\out\\cli.js

Additionally, the VSCode instance doesn't open. Even when I add VSCode to the devDependencies, there seems to be an error and it doesn't work.

2. Using VSBrowser to open folder:

import {VSBrowser} from 'vscode-extension-tester';
await VSBrowser.instance.openResources('/some/path/to/folder');

• The output :

Error: spawnSync cmd.exe ENOENT