From 1f28eaecdbc31766e3fcfa65702fa8eebff90ef6 Mon Sep 17 00:00:00 2001
From: Rebeka Dekany <50901361+rebekadekany@users.noreply.github.com>
Date: Mon, 15 Jun 2026 16:18:46 +0200
Subject: [PATCH] [web] Add Stripe acceptance tests (#34577)

* Add StripeClient mock-target support and Stripe test settings

Co-Authored-By: M Fahru <m.fahru@overleaf.com>

* Add Stripe payment page acceptance tests

Co-Authored-By: M Fahru <m.fahru@overleaf.com>

* Add MockStripeApi for stateful Stripe acceptance tests

Co-Authored-By: M Fahru <m.fahru@overleaf.com>

* Add Stripe subscription acceptance tests

* Add Stripe webhook acceptance tests

* Use a helper for setting the subscription status

---------

Co-authored-by: M Fahru <m.fahru@overleaf.com>
GitOrigin-RevId: b9bc50c914369da646ddb42ade1a02fd7baeb96b
---
 .../acceptance/config/settings.test.saas.js   |  12 +
 .../acceptance/src/mocks/MockStripeApi.mjs    | 363 ++++++++++++++++++
 2 files changed, 375 insertions(+)
 create mode 100644 services/web/test/acceptance/src/mocks/MockStripeApi.mjs

diff --git a/services/web/test/acceptance/config/settings.test.saas.js b/services/web/test/acceptance/config/settings.test.saas.js
index 0378c812c9..1608a215d9 100644
--- a/services/web/test/acceptance/config/settings.test.saas.js
+++ b/services/web/test/acceptance/config/settings.test.saas.js
@@ -32,6 +32,18 @@ const overrides = {
       webhookUser: 'recurly',
       webhookPass: 'webhook',
     },
+    stripeUS: {
+      accountId: 'test_us_account',
+      publishableKey: 'test_us_publishable_key',
+      secretKey: 'sk_test_xxx',
+      webhookSignature: 'test_us_webhook_signature',
+    },
+    stripeUK: {
+      accountId: 'test_uk_account',
+      publishableKey: 'test_uk_publishable_key',
+      secretKey: 'sk_test_xxx',
+      webhookSignature: 'test_uk_webhook_signature',
+    },
 
     v1: {
       url: `http://127.0.0.1:25000`,
diff --git a/services/web/test/acceptance/src/mocks/MockStripeApi.mjs b/services/web/test/acceptance/src/mocks/MockStripeApi.mjs
new file mode 100644
index 0000000000..99a8064368
--- /dev/null
+++ b/services/web/test/acceptance/src/mocks/MockStripeApi.mjs
@@ -0,0 +1,363 @@
+import AbstractMockApi from './AbstractMockApi.mjs'
+class MockStripeApi extends AbstractMockApi {
+  reset() {
+    this.customers = {}
+    this.setupIntents = {}
+    this.subscriptions = {}
+    this.prices = {}
+    this.products = {}
+    this.promotionCodes = []
+    // Deterministic ids so tests don't depend on Date.now()/randomness.
+    this.idCounter = 0
+  }
+
+  _nextId(prefix) {
+    this.idCounter += 1
+    return `${prefix}_mock_${this.idCounter}`
+  }
+
+  addMockPrice({
+    id,
+    lookupKey,
+    productId,
+    unitAmount = 1500,
+    currency = 'usd',
+    interval = 'month',
+    productMetadata = {},
+  }) {
+    const priceId = id || this._nextId('price')
+    const prodId = productId || this._nextId('prod')
+    const product = {
+      id: prodId,
+      object: 'product',
+      active: true,
+      metadata: productMetadata,
+    }
+    this.products[prodId] = product
+    const price = {
+      id: priceId,
+      object: 'price',
+      active: true,
+      lookup_key: lookupKey || null,
+      unit_amount: unitAmount,
+      currency,
+      recurring: { interval },
+      product,
+    }
+    this.prices[priceId] = price
+    return price
+  }
+
+  addMockSucceededSetupIntent({ customer, metadata = {}, paymentMethod }) {
+    const id = this._nextId('seti')
+    const setupIntent = {
+      id,
+      object: 'setup_intent',
+      status: 'succeeded',
+      client_secret: `${id}_secret_mock`,
+      customer: typeof customer === 'string' ? customer : customer.id,
+      payment_method: paymentMethod || this._nextId('pm'),
+      last_setup_error: null,
+      usage: 'off_session',
+      metadata,
+    }
+    this.setupIntents[id] = setupIntent
+    return setupIntent
+  }
+
+  // Render without every test having to seed the exact versioned lookup key
+  _syntheticPrice(lookupKey) {
+    const currency = lookupKey?.split('_').pop() || 'usd'
+    return this.addMockPrice({ lookupKey, currency })
+  }
+
+  getMockSubscription(id) {
+    return this.subscriptions[id]
+  }
+
+  setSubscriptionStatus(id, status) {
+    const subscription = this.subscriptions[id]
+    if (!subscription) {
+      throw new Error(`no mock subscription with id ${id}`)
+    }
+    subscription.status = status
+    return subscription
+  }
+
+  getMockCustomer(id) {
+    return this.customers[id]
+  }
+
+  _customerResponse(customer) {
+    return {
+      ...customer,
+      object: 'customer',
+      tax_ids: { object: 'list', data: customer.tax_ids || [] },
+    }
+  }
+
+  _expandSetupIntent(setupIntent, expand = []) {
+    if (expand.includes('customer') && this.customers[setupIntent.customer]) {
+      return {
+        ...setupIntent,
+        customer: this._customerResponse(this.customers[setupIntent.customer]),
+      }
+    }
+    return setupIntent
+  }
+
+  _subscriptionResponse(subscription) {
+    const customer = this.customers[subscription.customerId]
+    const items = subscription.items.map(item => {
+      const price = this.prices[item.priceId] || {
+        id: item.priceId,
+        object: 'price',
+        unit_amount: 0,
+        currency: subscription.currency,
+        product: { id: this._nextId('prod'), object: 'product', metadata: {} },
+      }
+      return {
+        id: item.id,
+        object: 'subscription_item',
+        quantity: item.quantity,
+        price,
+        current_period_start: subscription.current_period_start,
+        current_period_end: subscription.current_period_end,
+      }
+    })
+    return {
+      id: subscription.id,
+      object: 'subscription',
+      status: subscription.status,
+      currency: subscription.currency,
+      collection_method: subscription.collection_method,
+      customer: customer
+        ? this._customerResponse(customer)
+        : subscription.customerId,
+      items: { object: 'list', data: items },
+      latest_invoice: subscription.latest_invoice,
+      discounts: subscription.discounts || [],
+      schedule: null,
+      trial_start: subscription.trial_start || null,
+      trial_end: subscription.trial_end || null,
+      metadata: subscription.metadata || {},
+    }
+  }
+
+  _notFound(res, resource) {
+    res.status(404).json({
+      error: {
+        type: 'invalid_request_error',
+        code: 'resource_missing',
+        message: `No such ${resource}`,
+      },
+    })
+  }
+
+  applyRoutes() {
+    this.app.post('/v1/customers', (req, res) => {
+      const id = this._nextId('cus')
+      const customer = {
+        id,
+        email: req.body.email,
+        name: req.body.name,
+        address: req.body.address,
+        metadata: req.body.metadata || {},
+        tax_exempt: req.body.tax_exempt || 'none',
+        tax_ids: [],
+      }
+      this.customers[id] = customer
+      res.json(this._customerResponse(customer))
+    })
+
+    this.app.get('/v1/customers', (req, res) => {
+      let data = Object.values(this.customers)
+      if (req.query.email) {
+        data = data.filter(c => c.email === req.query.email)
+      }
+      res.json({
+        object: 'list',
+        has_more: false,
+        data: data.map(c => this._customerResponse(c)),
+      })
+    })
+
+    this.app.get('/v1/customers/:id', (req, res) => {
+      const customer = this.customers[req.params.id]
+      if (!customer) return this._notFound(res, 'customer')
+      res.json(this._customerResponse(customer))
+    })
+
+    this.app.post('/v1/customers/:id', (req, res) => {
+      const customer = this.customers[req.params.id]
+      if (!customer) return this._notFound(res, 'customer')
+      Object.assign(customer, req.body)
+      res.json(this._customerResponse(customer))
+    })
+
+    this.app.post('/v1/customers/:id/tax_ids', (req, res) => {
+      const customer = this.customers[req.params.id]
+      if (!customer) return this._notFound(res, 'customer')
+      const taxId = {
+        id: this._nextId('txi'),
+        object: 'tax_id',
+        type: req.body.type,
+        value: req.body.value,
+      }
+      customer.tax_ids.push(taxId)
+      res.json(taxId)
+    })
+
+    this.app.delete('/v1/customers/:id/tax_ids/:taxId', (req, res) => {
+      const customer = this.customers[req.params.id]
+      if (customer) {
+        customer.tax_ids = customer.tax_ids.filter(
+          t => t.id !== req.params.taxId
+        )
+      }
+      res.json({ id: req.params.taxId, object: 'tax_id', deleted: true })
+    })
+
+    this.app.post('/v1/setup_intents', (req, res) => {
+      const id = this._nextId('seti')
+      const setupIntent = {
+        id,
+        object: 'setup_intent',
+        status: 'requires_payment_method',
+        client_secret: `${id}_secret_mock`,
+        customer: req.body.customer,
+        usage: req.body.usage,
+        payment_method: null,
+        last_setup_error: null,
+        metadata: req.body.metadata || {},
+      }
+      this.setupIntents[id] = setupIntent
+      res.json(setupIntent)
+    })
+
+    this.app.get('/v1/setup_intents/:id', (req, res) => {
+      const setupIntent = this.setupIntents[req.params.id]
+      if (!setupIntent) return this._notFound(res, 'setup_intent')
+      const expand = [].concat(req.query.expand || [])
+      res.json(this._expandSetupIntent(setupIntent, expand))
+    })
+
+    this.app.post('/v1/subscriptions', (req, res) => {
+      const id = this._nextId('sub')
+      const items = [].concat(req.body.items || []).map(item => ({
+        id: this._nextId('si'),
+        priceId: item.price,
+        quantity: parseInt(item.quantity || '1', 10),
+      }))
+      const invoiceId = this._nextId('in')
+      // default_incomplete payment behaviour -> subscription starts incomplete
+      // with an open invoice carrying a confirmation secret.
+      const subscription = {
+        id,
+        customerId: req.body.customer,
+        status: req.body.trial_period_days ? 'trialing' : 'incomplete',
+        currency: 'usd',
+        collection_method: req.body.collection_method || 'charge_automatically',
+        items,
+        metadata: req.body.metadata || {},
+        discounts: [],
+        current_period_start: 1700000000,
+        current_period_end: 1702592000,
+        latest_invoice: {
+          id: invoiceId,
+          object: 'invoice',
+          status: 'open',
+          total: 1500,
+          subtotal_excluding_tax: 1500,
+          total_excluding_tax: 1500,
+          discounts: [],
+          total_taxes: [],
+          confirmation_secret: {
+            object: 'confirmation_secret',
+            client_secret: `${invoiceId}_secret_mock`,
+          },
+        },
+      }
+      this.subscriptions[id] = subscription
+      res.json(this._subscriptionResponse(subscription))
+    })
+
+    this.app.get('/v1/subscriptions/:id', (req, res) => {
+      const subscription = this.subscriptions[req.params.id]
+      if (!subscription) return this._notFound(res, 'subscription')
+      res.json(this._subscriptionResponse(subscription))
+    })
+
+    this.app.get('/v1/subscriptions', (req, res) => {
+      let data = Object.values(this.subscriptions)
+      if (req.query.customer) {
+        data = data.filter(s => s.customerId === req.query.customer)
+      }
+      res.json({
+        object: 'list',
+        has_more: false,
+        data: data.map(s => this._subscriptionResponse(s)),
+      })
+    })
+
+    this.app.get('/v1/prices', (req, res) => {
+      let data = Object.values(this.prices)
+      if (req.query.lookup_keys) {
+        const keys = [].concat(req.query.lookup_keys)
+        data = data.filter(p => keys.includes(p.lookup_key))
+        for (const key of keys) {
+          if (!data.some(p => p.lookup_key === key)) {
+            data.push(this._syntheticPrice(key))
+          }
+        }
+      }
+      res.json({ object: 'list', has_more: false, data })
+    })
+
+    this.app.get('/v1/prices/:id', (req, res) => {
+      const price = this.prices[req.params.id]
+      if (!price) return this._notFound(res, 'price')
+      res.json(price)
+    })
+
+    this.app.get('/v1/products', (req, res) => {
+      res.json({
+        object: 'list',
+        has_more: false,
+        data: Object.values(this.products),
+      })
+    })
+
+    this.app.post('/v1/invoices/create_preview', (req, res) => {
+      res.json({
+        object: 'invoice',
+        currency: req.body.currency || 'usd',
+        subtotal: 1500,
+        total: 1500,
+        total_excluding_tax: 1500,
+        total_discount_amounts: [],
+        total_taxes: [],
+        discounts: [],
+        lines: { object: 'list', has_more: false, data: [] },
+      })
+    })
+
+    this.app.get('/v1/promotion_codes', (req, res) => {
+      res.json({
+        object: 'list',
+        has_more: false,
+        data: this.promotionCodes,
+      })
+    })
+  }
+}
+
+export default MockStripeApi
+
+// type hint for the inherited `instance` method
+/**
+ * @function instance
+ * @memberOf MockStripeApi
+ * @static
+ * @returns {MockStripeApi}
+ */