@defra-fish/gafl-webapp-service/src/utils/__tests__/validators.spec.js

The websales frontend for the GAFL service

import { runValidators } from '../validators.js'

describe('runValidators', () => {
  it('runs all validators without throwing when every validator succeeds', () => {
    const validatorOne = jest.fn()
    const validatorTwo = jest.fn()
    const payload = { referenceNumber: 'AB1234' }

    expect(() => runValidators([validatorOne, validatorTwo], payload)).not.toThrow()

    expect(validatorOne).toHaveBeenCalledWith(payload)
    expect(validatorTwo).toHaveBeenCalledWith(payload)
  })

  it('re-throws the original error when a single validator fails', () => {
    const error = new Error('validation failed')
    const failingValidator = () => {
      throw error
    }

    expect(() => runValidators([failingValidator], {})).toThrow(error)
  })

  it('merges error details when multiple validators fail', () => {
    const firstError = new Error('first failure')
    firstError.details = [{ message: 'first issue', path: ['fieldOne'] }]
    const secondError = new Error('second failure')
    secondError.details = [{ message: 'second issue', path: ['fieldTwo'] }]

    const firstValidator = () => {
      throw firstError
    }
    const secondValidator = () => {
      throw secondError
    }

    try {
      runValidators([firstValidator, secondValidator], { foo: 'bar' })
      throw new Error('Expected runValidators to throw')
    } catch (err) {
      expect(err).toBeInstanceOf(Error)
      expect(err.message).toEqual('expected error')
      expect(err.details).toEqual([
        { message: 'first issue', path: ['fieldOne'] },
        { message: 'second issue', path: ['fieldTwo'] }
      ])
    }
  })
})