Added scaffolding for testing Members with Stripe (#14142)

refs https://github.com/TryGhost/Team/issues/1338

This adds some initial scaffolding to make it easier to test Members with Stripe
 - `mockStripe` method to disable the network, so we can use nock to intercept
Stripe API calls
- `setupStripe` method to be called _before_ getting an agent so that Stripe is 
configured
- `getMembersAPIAgent` to get an agent for the Members frontend API

test/e2e-api/members/webhooks.test.js

@@ -0,0 +1,61 @@
+const stripe = require('stripe');
+const {agentProvider, mockManager, fixtureManager} = require('../../utils/e2e-framework');
+
+let agent;
+
+describe('Members API', function () {
+    before(async function () {
+        process.env.WEBHOOK_SECRET = 'pissoff';
+        // Weird - most of the mocks happen after getting the agent
+        // but to mock stripe we want to fake the stripe keys in the settings.
+        // And it's initialised at boot - so mocking it before
+        // Probably wanna replace this with a settinfs fixture mock or smth??
+        mockManager.setupStripe();
+        agent = await agentProvider.getMembersAPIAgent();
+        await fixtureManager.init('members');
+    });
+
+    beforeEach(function () {
+        mockManager.mockLabsEnabled('multipleProducts');
+        mockManager.mockMail();
+        mockManager.mockStripe();
+    });
+
+    afterEach(function () {
+        mockManager.restore();
+    });
+
+    it('Can communicate with the frontend Members API', async function () {
+        await agent.get('/api/site/')
+            .expectStatus(200);
+    });
+
+    describe('/webhooks/stripe/', function () {
+        it('Responds with a 401 when the signature is invalid', async function () {
+            await agent.post('/webhooks/stripe/')
+                .body({
+                    fake: 'data'
+                })
+                .header('stripe-signature', 'dodgy')
+                .expectStatus(401);
+        });
+
+        it('Responds with a 200 to unknown events with valid signature', async function () {
+            const webhookPayload = JSON.stringify({
+                type: 'unknown',
+                data: {
+                    id: 'id_123'
+                }
+            });
+            const webhookSignature = stripe.webhooks.generateTestHeaderString({
+                payload: webhookPayload,
+                secret: process.env.WEBHOOK_SECRET
+            });
+
+            await agent.post('/webhooks/stripe/')
+                .body(webhookPayload)
+                .header('stripe-signature', webhookSignature)
+                .expectStatus(200);
+        });
+    });
+});

test/utils/e2e-framework-mock-manager.js

@@ -1,6 +1,7 @@
 const errors = require('@tryghost/errors');
 const sinon = require('sinon');
 const assert = require('assert');
+const nock = require('nock');
 
 // Helper services
 const configUtils = require('./configUtils');
@@ -11,6 +12,7 @@ let emailCount = 0;
 // Mockable services
 const mailService = require('../../core/server/services/mail/index');
 const labs = require('../../core/shared/labs');
+const settingsCache = require('../../core/shared/settings-cache');
 
 const mockMail = () => {
     mocks.mail = sinon
@@ -20,6 +22,25 @@ const mockMail = () => {
     return mocks.mail;
 };
 
+const mockStripe = () => {
+    nock.disableNetConnect();
+};
+
+const setupStripe = () => {
+    mocks.settings = sinon.stub(settingsCache, 'get').callsFake(function (key, ...args) {
+        if (key === 'stripe_connect_secret_key') {
+            return 'sk_test_blah';
+        }
+        if (key === 'stripe_connect_publishable_key') {
+            return 'pk_test_blah';
+        }
+        if (key === 'stripe_connect_account_name') {
+            return 'Test Account';
+        }
+        return settingsCache.get.wrappedMethod.call(settingsCache, key, ...args);
+    });
+};
+
 const mockLabsEnabled = (flag, alpha = true) => {
     mocks.labs = mocks.labs || {};
 
@@ -88,10 +109,14 @@ const restore = () => {
     sinon.restore();
     mocks = {};
     emailCount = 0;
+    nock.cleanAll();
+    nock.enableNetConnect();
 };
 
 module.exports = {
     mockMail,
+    setupStripe,
+    mockStripe,
     mockLabsEnabled,
     mockLabsDisabled,
     restore,