refactor: tmpdir and add to test utils

test/utils/constants.ts

@@ -1,3 +1,14 @@
+import * as fs from "fs"
+import * as os from "os"
+import * as path from "path"
+
 export const CODE_SERVER_ADDRESS = process.env.CODE_SERVER_ADDRESS || "http://localhost:8080"
 export const PASSWORD = process.env.PASSWORD || "e45432jklfdsab"
 export const STORAGE = process.env.STORAGE || ""
+
+export async function tmpdir(testName: string): Promise<string> {
+  const dir = path.join(os.tmpdir(), "code-server")
+  await fs.promises.mkdir(dir, { recursive: true })
+
+  return await fs.promises.mkdtemp(path.join(dir, `test-${testName}-`), { encoding: "utf8" })
+}