NodeJS source (view on github)

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

module.exports = {
  post: async (req) => {
    if (!req.query || !req.query.subscriptionid) {
      throw new Error('invalid-subscriptionid')
    }
    const subscription = await global.api.administrator.subscriptions.Subscription.get(req)
    if (!subscription) {
      throw new Error('invalid-subscriptionid')
    }
    req.query.invoiceid = subscription.stripeObject.latest_invoice
    const invoice = await global.api.administrator.subscriptions.Invoice.get(req)
    if (!invoice.stripeObject.charge) {
      throw new Error('invalid-subscription')
    }
    if ((subscription.stripeObject.status !== 'active' && subscription.stripeObject.status !== 'trialing') || subscription.stripeObject.cancel_at_period_end) {
      throw new Error('invalid-subscription')
    }
    req.query.chargeid = invoice.stripeObject.charge
    const charge = await global.api.administrator.subscriptions.Charge.get(req)
    if (!charge) {
      throw new Error('invalid-subscription')
    }
    const zeroed = []
    for (const item of subscription.stripeObject.items.data) {
      zeroed.push({ id: item.id, quantity: 0 })
    }
    const upcoming = await stripeCache.execute('invoices', 'retrieveUpcoming', {
      customer: invoice.customerid,
      subscription: req.query.subscriptionid,
      subscription_items: zeroed
    }, req.stripeKey)
    if (upcoming.total === 0) {
      throw new Error('invalid-subscription')
    }
    const refundInfo = {
      charge: invoice.stripeObject.charge,
      amount: -upcoming.total,
      reason: 'requested_by_customer'
    }
    const refund = await stripeCache.execute('refunds', 'create', refundInfo, req.stripeKey)
    await subscriptions.Storage.Refund.create({
      appid: req.appid || global.appid,
      refundid: refund.id,
      accountid: subscription.accountid,
      subscriptionid: subscription.subscriptionid,
      customerid: subscription.customerid,
      stripeObject: refund
    })
    req.query.refundid = refund.id
    return global.api.administrator.subscriptions.Refund.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/administrator/subscriptions/create-cancelation-refund', 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()
    // missing and invalid id
    const req = TestHelper.createRequest('/api/administrator/subscriptions/create-cancelation-refund')
    req.account = administrator.account
    req.session = administrator.session
    req.body = {
      refund: 'at_period_end'
    }
    try {
      await req.post()
    } catch (error) {
      cachedResponses.missing = error.message
    }
    const req2 = TestHelper.createRequest('/api/administrator/subscriptions/create-cancelation-refund?subscriptionid=invalid')
    req2.account = administrator.account
    req2.session = administrator.session
    try {
      await req2.post()
    } catch (error) {
      cachedResponses.invalid = error.message
    }
    // invalid subscription
    const user = await TestStripeAccounts.createUserWithPaidSubscription(administrator.price)
    await TestHelper.cancelSubscription(user)
    const req3 = TestHelper.createRequest(`/api/administrator/subscriptions/create-cancelation-refund?subscriptionid=${user.subscription.subscriptionid}`)
    req3.account = administrator.account
    req3.session = administrator.session
    try {
      await req3.post()
    } catch (error) {
      cachedResponses.invalidSubscription = error.message
    }
    // returns
    await TestStripeAccounts.createUserWithPaidSubscription(administrator.price, user)
    const req4 = TestHelper.createRequest(`/api/administrator/subscriptions/create-cancelation-refund?subscriptionid=${user.subscription.subscriptionid}`)
    req4.account = administrator.account
    req4.session = administrator.session
    req4.body = {
      refund: 'credit'
    }
    req4.filename = __filename
    req4.saveResponse = true
    cachedResponses.returns = await req4.post()
    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-subscription', () => {
      it('ineligible querystring subscription is not active', async function () {
        await bundledData(this.test.currentRetry())
        const errorMessage = cachedResponses.invalidSubscription
        assert.strictEqual(errorMessage, 'invalid-subscription')
      })
    })
  })

  describe('returns', () => {
    it('object', async () => {
      const refund = cachedResponses.returns
      assert.strictEqual(refund.object, 'refund')
    })
  })
})