Function setValue

test/utils/helpers.ts:57–57

(nextValue: string | undefined)

export function useEnv(key: string): [(nextValue: string | undefined) => string | undefined, () => void] {
  const initialValue = process.env[key]
  const setValue = (nextValue: string | undefined) => (process.env[key] = nextValue)
  // Node automatically converts undefined to string 'undefined'
  // when assigning an environment variable.
  // which is why we need to delete it if it's supposed to be undefined