Nuxt/test/unit/utils.test.js

import { Utils } from '../../'

describe('utils', () => {
  test('encodeHtml', () => {
    const html = '<h1>Hello</h1>'
    expect(Utils.encodeHtml(html)).toBe('&lt;h1&gt;Hello&lt;/h1&gt;')
  })

  test('getContext', () => {
    let ctx = Utils.getContext({ a: 1 }, { b: 2 })
    expect(Utils.getContext.length).toBe(2)
    expect(typeof ctx.req).toBe('object')
    expect(typeof ctx.res).toBe('object')
    expect(ctx.req.a).toBe(1)
    expect(ctx.res.b).toBe(2)
  })

  test('waitFor', async () => {
    let s = Date.now()
    await Utils.waitFor(100)
    expect(Date.now() - s >= 100).toBe(true)
    await Utils.waitFor()
  })

  test('timeout (promise)', async () => {
    const result = await Utils.timeout(Promise.resolve('time not run out'), 100)
    expect(result).toBe('time not run out')
  })

  test('timeout (async function)', async () => {
    const result = await Utils.timeout(async () => {
      await Utils.waitFor(10)
      return 'time not run out'
    }, 100)
    expect(result).toBe('time not run out')
  })

  test('timeout (timeout in 100ms)', async () => {
    const timeout = Utils.timeout(Utils.waitFor(200), 100, 'timeout test 100ms')
    await expect(timeout).rejects.toThrow('timeout test 100ms')
  })

  test('timeout (async timeout in 100ms)', async () => {
    const timeout = Utils.timeout(async () => {
      await Utils.waitFor(500)
    }, 100, 'timeout test 100ms')
    await expect(timeout).rejects.toThrow('timeout test 100ms')
  })

  test('urlJoin', () => {
    expect(Utils.urlJoin('test', '/about')).toBe('test/about')
  })

  test('promisifyRoute (array)', () => {
    const array = [1]
    const promise = Utils.promisifyRoute(array)
    expect(typeof promise).toBe('object')
    return promise.then(res => {
      expect(res).toBe(array)
    })
  })

  test('promisifyRoute (fn => array)', () => {
    const array = [1, 2]
    const fn = function () {
      return array
    }
    const promise = Utils.promisifyRoute(fn)
    expect(typeof promise).toBe('object')
    return promise.then(res => {
      expect(res).toBe(array)
    })
  })

  test('promisifyRoute (fn => promise)', () => {
    const array = [1, 2, 3]
    const fn = function () {
      return new Promise(resolve => {
        resolve(array)
      })
    }
    const promise = Utils.promisifyRoute(fn)
    expect(typeof promise).toBe('object')
    return promise.then(res => {
      expect(res).toBe(array)
    })
  })

  test('promisifyRoute ((fn(args) => promise))', () => {
    const fn = function (array) {
      return new Promise(resolve => {
        resolve(array)
      })
    }
    const array = [1, 2, 3]
    const promise = Utils.promisifyRoute(fn, array)
    expect(typeof promise).toBe('object')
    return promise.then(res => {
      expect(res).toBe(array)
    })
  })

  test('promisifyRoute (fn(cb) with error)', () => {
    const fn = function (cb) {
      cb(new Error('Error here'))
    }
    const promise = Utils.promisifyRoute(fn)
    expect(typeof promise).toBe('object')
    return promise.catch(e => {
      expect(e.message).toBe('Error here')
    })
  })

  test('promisifyRoute (fn(cb, args) with error)', () => {
    const fn = function (cb, array) {
      cb(new Error('Error here: ' + array.join()))
    }
    const array = [1, 2, 3, 4]
    const promise = Utils.promisifyRoute(fn, array)
    expect(typeof promise).toBe('object')
    return promise.catch(e => {
      expect(e.message).toBe('Error here: ' + array.join())
    })
  })

  test('promisifyRoute (fn(cb) with result)', () => {
    const array = [1, 2, 3, 4]
    const fn = function (cb) {
      cb(null, array)
    }
    const promise = Utils.promisifyRoute(fn)
    expect(typeof promise).toBe('object')
    return promise.then(res => {
      expect(res).toBe(array)
    })
  })

  test('promisifyRoute (fn(cb, args) with result)', () => {
    const fn = function (cb, array, object) {
      cb(null, { array, object })
    }
    const array = [1, 2, 3, 4]
    const object = { a: 1 }
    const promise = Utils.promisifyRoute(fn, array, object)
    expect(typeof promise).toBe('object')
    return promise.then(res => {
      expect(res.array).toBe(array)
      expect(res.object).toBe(object)
    })
  })

  test('chainFn (mutate, mutate)', () => {
    // Pass more than one argument to test that they're actually taken into account
    const firstFn = function (obj, count) {
      obj.foo = count + 1
    }
    const secondFn = function (obj, count) {
      obj.bar = count + 2
    }

    const chainedFn = Utils.chainFn(firstFn, secondFn)
    expect(chainedFn({}, 10)).toEqual({ foo: 11, bar: 12 })
  })

  test('chainFn (mutate, return)', () => {
    const firstFn = function (obj, count) {
      obj.foo = count + 1
    }
    const secondFn = function (obj, count) {
      return Object.assign({}, obj, { bar: count + 2 })
    }

    const chainedFn = Utils.chainFn(firstFn, secondFn)
    expect(chainedFn({}, 10)).toEqual({ foo: 11, bar: 12 })
  })

  test('chainFn (return, mutate)', () => {
    const firstFn = function (obj, count) {
      return Object.assign({}, obj, { foo: count + 1 })
    }
    const secondFn = function (obj, count) {
      obj.bar = count + 2
    }

    const chainedFn = Utils.chainFn(firstFn, secondFn)
    expect(chainedFn({}, 10)).toEqual({ foo: 11, bar: 12 })
  })

  test('chainFn (return, return)', () => {
    const firstFn = function (obj, count) {
      return Object.assign({}, obj, { foo: count + 1 })
    }
    const secondFn = function (obj, count) {
      return Object.assign({}, obj, { bar: count + 2 })
    }

    const chainedFn = Utils.chainFn(firstFn, secondFn)
    expect(chainedFn({}, 10)).toEqual({ foo: 11, bar: 12 })
  })
})