Function withCurrent

turbopack/packages/devlow-bench/src/describe.ts:76–85

(
  current: CurrentScenario,
  fn: () => Promise<void>
)

let currentScenario: CurrentScenario | null = null

export function withCurrent(
  current: CurrentScenario,
  fn: () => Promise<void>
): Promise<void> {
  const prev = currentScenario
  currentScenario = current
  return fn().finally(() => {
    currentScenario = prev
  })
}

export const PREVIOUS = Symbol('previous measurement with that unit')