Function throws

src/process-args.test.js:108–118

(fn, match)

/* istanbul ignore next */
function throws (fn, match) {
  try {
    fn()
    assert(false, 'Expecting error')
  } catch (error) {
    if (!match.test(error)) {
      error.message = `Error did not match ${match}\n${error.message}`
      throw error
    }
  }
}