Function makeFakeHandle

packages/ai-claude-code/tests/projection.test.ts:42–70

Build a fake handle that records writes/execs and tracks existing paths.

(execResult: ExecResult)

/** Build a fake handle that records writes/execs and tracks existing paths. */
function makeFakeHandle(execResult: ExecResult): FakeHandle {
  const writes = new Map<string, string>()
  const execs: Array<RecordedExec> = []
  const existing = new Set<string>()
  const dirs = new Set<string>()

  const handle = {
    fs: {
      write: (path: string, data: string | Uint8Array) => {
        writes.set(path, typeof data === 'string' ? data : '')
        existing.add(path)
        return Promise.resolve()
      },
      exists: (path: string) => Promise.resolve(existing.has(path)),
      mkdir: (path: string) => {
        dirs.add(path)
        return Promise.resolve()
      },
    },
    process: {
      exec: (command: string, options?: { cwd?: string }) => {
        execs.push({ command, cwd: options?.cwd })
        return Promise.resolve(execResult)
      },
    },
  } as unknown as SandboxHandle

  return { handle, writes, execs, existing }
}

const ROOT = '/workspace'
const MARKER = `${ROOT}/.tanstack-projected-abc123`