Function fn

apps/sim/lib/concurrency/__tests__/singleflight.test.ts:33–36

()

  it('returns the same promise instance to concurrent callers', () => {
    const fn = async () => {
      await sleep(10)
      return 1
    }
    const a = coalesceLocally('same-key', fn)
    const b = coalesceLocally('same-key', fn)
    expect(a).toBe(b)