hashids/src/tests/custom-alphabet.test.ts

Generate YouTube-like ids from numbers. Use Hashids when you do not want to expose your database ids to the user.

/* eslint-disable jest/expect-expect */
import Hashids from '../hashids'

describe('custom alphabet', () => {
  const testAlphabet = (alphabet: string) => {
    const hashids = new Hashids('', 0, alphabet)
    const numbers = [1, 2, 3]

    const id = hashids.encode(numbers)
    const decodedNumbers = hashids.decode(id)

    expect(decodedNumbers).toEqual(numbers)
  }

  it(`should work with the worst alphabet`, () => {
    testAlphabet('cCsSfFhHuUiItT01')
  })

  it(`should work with an alphabet containing spaces`, () => {
    testAlphabet('cCsSfFhH uUiItT01')
  })

  it(`should work with half the alphabet being separators`, () => {
    testAlphabet('abdegjklCFHISTUc')
  })

  it(`should work with exactly 2 separators`, () => {
    testAlphabet('abdegjklmnopqrSF')
  })

  it(`should work with no separators`, () => {
    testAlphabet('abdegjklmnopqrvwxyzABDEGJKLMNOPQRVWXYZ1234567890')
  })

  it(`should work with super long alphabet`, () => {
    testAlphabet(
      'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890`~!@#$%^&*()-_=+\\|\'";:/?.>,<{[}]',
    )
  })

  it(`should work with a weird alphabet`, () => {
    testAlphabet('`~!@#$%^&*()-_=+\\|\'";:/?.>,<{[}]')
  })

  it(`should work with an alphabet with unicode chars`, () => {
    testAlphabet('😀😁😂🤣😃😄😅😆😉😊😋😎😍😘🥰😗😙😚')
  })

  it(`should work with an alphabet with complex unicode chars`, () => {
    testAlphabet('🤺👩🏿‍🦳🛁👩🏻🦷🤦‍♂️🐁☝🏼✍🏾👉🏽🇸🇰❤️🍭')
  })

  it(`should work with alphabet that contains emojis that are subsets of each other`, () => {
    testAlphabet('😍🧑🏽‍🦳🧑🍷👩🏿‍🦰👩🏾‍🦰👩🏽‍🦰👩🏻‍🦰✍🏾👉🏽👩🏻🦷🤦‍♂️')
    testAlphabet('😍🧑🧑🏽‍🦳🍷👩🏻‍🦰👩🏿‍🦰👩🏽‍🦰👩🏾‍🦰✍🏾👉🏽👩🏻🦷🤦‍♂️')
  })
})