docs/tests/unit/versions.js

const revalidator = require('revalidator')
const allVersions = require('../../lib/all-versions')
const { latest } = require('../../lib/enterprise-server-releases')
const schema = require('../../lib/versions-schema')
const { getJSON } = require('../helpers/supertest')
const nonEnterpriseDefaultVersion = require('../../lib/non-enterprise-default-version')

describe('versions module', () => {
  test('is an object with versions as keys', () => {
    expect(nonEnterpriseDefaultVersion in allVersions).toBe(true)
    expect(`enterprise-server@${latest}` in allVersions).toBe(true)
  })

  test('every version is valid', () => {
    Object.values(allVersions).forEach(versionObj => {
      const { valid, errors } = revalidator.validate(versionObj, schema)
      const expectation = JSON.stringify({ versionObj, errors }, null, 2)
      expect(valid, expectation).toBe(true)
    })
  })
})

describe('versions middleware', () => {
  jest.setTimeout(5 * 60 * 1000)

  test('adds res.context.allVersions object', async () => {
    const allVersionsFromMiddleware = await getJSON('/en?json=allVersions')
    expect(allVersionsFromMiddleware).toEqual(allVersions)
  })

  test('adds res.context.currentVersion string', async () => {
    let currentVersion = await getJSON('/en?json=currentVersion')
    expect(currentVersion).toBe('homepage')

    currentVersion = await getJSON(`/en/${nonEnterpriseDefaultVersion}?json=currentVersion`)
    expect(currentVersion).toBe('homepage')

    currentVersion = await getJSON(`/en/enterprise-server@${latest}?json=currentVersion`)
    expect(currentVersion).toBe(`enterprise-server@${latest}`)
  })
})