Function catchError

test/css-syntax-error.test.ts:20–31

(cb: () => Promise<any>)

}

async function catchError(cb: () => Promise<any>): Promise<CssSyntaxError> {
  try {
    await cb()
  } catch (e) {
    if (isSyntaxError(e)) {
      return e
    } else {
      throw e
    }
  }
  throw new Error('Error was not thrown')
}

function parseError(
  css: string,