NodeJS source (view on github)

const dashboard = require('@layeredapps/dashboard')
const stripeCache = require('../../../../stripe-cache.js')
const subscriptions = require('../../../../../index.js')

module.exports = {
  patch: async (req) => {
    if (!req.query || !req.query.subscriptionid) {
      throw new Error('invalid-subscriptionid')
    }
    const subscription = await global.api.user.subscriptions.Subscription.get(req)
    if (!subscription) {
      throw new Error('invalid-subscriptionid')
    }
    if (!req.body.itemid) {
      throw new Error('invalid-itemid')
    }
    let existingItem
    for (const item of subscription.stripeObject.items.data) {
      if (item.id === req.body.itemid) {
        existingItem = item
        break
      }
    }
    if (!existingItem) {
      throw new Error('invalid-itemid')
    }
    if (subscription.stripeObject.items.data.length === 1) {
      throw new Error('only-item')
    }
    const itemNow = await stripeCache.execute('subscriptionItems', 'del', req.body.itemid, req.stripeKey)
    if (!itemNow) {
      throw new Error('unknown-error')
    }
    const subscriptionNow = await stripeCache.execute('subscriptions', 'retrieve', req.query.subscriptionid, req.stripeKey)
    if (!subscriptionNow) {
      throw new Error('unknown-error')
    }
    await subscriptions.Storage.Subscription.update({
      stripeObject: subscriptionNow
    }, {
      where: {
        subscriptionid: req.query.subscriptionid,
        appid: req.appid || global.appid
      }
    })
    await dashboard.StorageCache.remove(req.query.subscriptionid)
    return global.api.user.subscriptions.Subscription.get(req)
  }
}

Test source (view on github)

/* eslint-env mocha */
const assert = require('assert')
const TestHelper = require('../../../../../test-helper.js')
const TestStripeAccounts = require('../../../../../test-stripe-accounts.js')
const DashboardTestHelper = require('@layeredapps/dashboard/test-helper.js')

describe('/api/user/subscriptions/delete-subscription-item', function () {
  before(TestHelper.disableMetrics)
  after(TestHelper.enableMetrics)
  let cachedResponses
  async function bundledData (retryNumber) {
    if (retryNumber > 0) {
      cachedResponses = {}
    }
    if (cachedResponses && cachedResponses.finished) {
      return
    }
    cachedResponses = {}
    await TestHelper.setupBefore()
    await DashboardTestHelper.setupBeforeEach()
    await TestHelper.setupBeforeEach()
    const administrator = await TestStripeAccounts.createOwnerWithPrice()
    const user = await TestStripeAccounts.createUserWithPaidSubscription(administrator.price)
    const user2 = await TestHelper.createUser()
    // missing and invalid id
    let req = TestHelper.createRequest('/api/user/subscriptions/delete-subscription-item')
    req.account = user.account
    req.session = user.session
    req.body = {
      itemid: user.subscription.stripeObject.items.data[0].id
    }
    try {
      await req.patch()
    } catch (error) {
      cachedResponses.missing = error.message
    }
    req = TestHelper.createRequest('/api/user/subscriptions/delete-subscription-item?subscriptionid=invalid')
    req.account = user.account
    req.session = user.session
    req.body = {
      itemid: user.subscription.stripeObject.items.data[0].id
    }
    try {
      await req.patch()
    } catch (error) {
      cachedResponses.invalid = error.message
    }
    // invalid account
    req = TestHelper.createRequest(`/api/user/subscriptions/delete-subscription-item?subscriptionid=${user.subscription.subscriptionid}`)
    req.account = user2.account
    req.session = user2.session
    req.body = {
      itemid: user.subscription.stripeObject.items.data[0].id
    }
    try {
      await req.patch()
    } catch (error) {
      cachedResponses.account = error.message
    }
    // invalid itemid
    req = TestHelper.createRequest(`/api/user/subscriptions/delete-subscription-item?subscriptionid=${user.subscription.subscriptionid}`)
    req.account = user.account
    req.session = user.session
    req.body = {
      itemid: ''
    }
    try {
      await req.patch()
    } catch (error) {
      cachedResponses.missingItem = error.message
    }
    req = TestHelper.createRequest(`/api/user/subscriptions/delete-subscription-item?subscriptionid=${user.subscription.subscriptionid}`)
    req.account = user.account
    req.session = user.session
    req.body = {
      itemid: 'invalid'
    }
    try {
      await req.patch()
    } catch (error) {
      cachedResponses.invalidItem = error.message
    }
    // only items
    req = TestHelper.createRequest(`/api/user/subscriptions/delete-subscription-item?subscriptionid=${user.subscription.subscriptionid}`)
    req.account = user.account
    req.session = user.session
    req.body = {
      itemid: user.subscription.stripeObject.items.data[0].id
    }
    try {
      await req.patch()
    } catch (error) {
      cachedResponses.onlyItem = error.message
    }
    // returns
    const price2 = await TestHelper.createPrice(administrator)
    await TestHelper.addSubscriptionItem(user, price2.priceid, 1)
    req = TestHelper.createRequest(`/api/user/subscriptions/delete-subscription-item?subscriptionid=${user.subscription.subscriptionid}`)
    req.account = user.account
    req.session = user.session
    req.body = {
      itemid: user.subscription.stripeObject.items.data[0].id
    }
    req.filename = __filename
    req.saveResponse = true
    cachedResponses.returns = await req.patch()
    cachedResponses.finished = true
  }

  describe('exceptions', () => {
    describe('invalid-subscriptionid', () => {
      it('missing querystring subscriptionid', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.missing
        assert.strictEqual(errorMessage, 'invalid-subscriptionid')
      })

      it('invalid querystring subscriptionid', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.invalid
        assert.strictEqual(errorMessage, 'invalid-subscriptionid')
      })
    })

    describe('invalid-account', () => {
      it('ineligible accessing account', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.account
        assert.strictEqual(errorMessage, 'invalid-account')
      })
    })

    describe('invalid-itemid', () => {
      it('missing posted itemid', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.missingItem
        assert.strictEqual(errorMessage, 'invalid-itemid')
      })

      it('invalid posted itemid', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.invalidItem
        assert.strictEqual(errorMessage, 'invalid-itemid')
      })
    })

    describe('only-item', () => {
      it('invalid posted itemid is only item', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.onlyItem
        assert.strictEqual(errorMessage, 'only-item')
      })
    })
  })

  describe('returns', () => {
    it('object', async () => {
      const subscriptionNow = cachedResponses.returns
      assert.strictEqual(subscriptionNow.stripeObject.items.data.length, 1)
    })
  })
})