File checkpoint.test.ts

src/core/checkpoints/__tests__/checkpoint.test.ts:None–None

import { describe, it, expect, vi, beforeEach, afterEach, Mock } from "vitest"
import { Task } from "../../task/Task"
import { ClineProvider } from "../../webview/ClineProvider"
import { checkpointSave, checkpointRestore, checkpointDiff, getCheckpointService } from "../index"