// SPDX-License-Identifier: LicenseRef-ConusAI-Template-1.0
// Which `modules/<id>/__tests__/isolation.ts` files the tenant-isolation suite reads: those of the modules
// the app registers. A module folder that is present but not registered (built and tested, held until its
// owner opens it) serves no procedure, so its fixtures would name procedures this registry does not have.

import { existsSync, readdirSync } from "node:fs"
import { join } from "node:path"

export function isolationFilesOf(modulesDir: string, registered: Iterable<string>): string[] {
  const ids = new Set(registered)
  return readdirSync(modulesDir)
    .filter((id) => ids.has(id))
    .map((id) => join(modulesDir, id, "__tests__", "isolation.ts"))
    .filter((path) => existsSync(path))
}