Add SEPA Direct Debit Core Support (#382)

test/instruments/instruments-it.js

@@ -0,0 +1,58 @@
+import { expect } from "chai";
+import nock from "nock";
+import Checkout from '../../src/Checkout.js'
+import { ValidationError } from "../../src/services/errors.js";
+
+afterEach(() => {
+  nock.cleanAll();
+  nock.enableNetConnect();
+});
+
+const cko = new Checkout(process.env.CHECKOUT_DEFAULT_SECRET_KEY, {
+  pk: process.env.CHECKOUT_PREVIOUS_PUBLIC_KEY,
+  environment: 'sandbox',
+});
+
+const sepaRequest = {
+  "type": "sepa",
+  "instrument_data": {
+    "account_number": "FR2810096000509685512959O86",
+    "country": "FR",
+    "currency": "EUR",
+    "payment_type": "recurring",
+    "mandate_id": "1234567890",
+    "date_of_signature": "2020-01-01"
+  },
+  "account_holder": {
+    "first_name": "John",
+    "last_name": "Smith",
+    "billing_address": {
+      "address_line1": "Cloverfield St.",
+      "address_line2": "23A",
+      "city": "London",
+      "zip": "SW1A 1AA",
+      "country": "GB"
+    }
+  }
+}
+
+describe('Instruments::Create', () => {
+  describe('Sepa', () => {
+
+    it('Should create a Sepa Instrument', async () => {
+      const response = await cko.instruments.create(sepaRequest);
+
+      expect(response).to.not.be.null;
+      expect(response.id).to.not.be.null;
+      expect(response.fingerprint).to.not.be.null;
+    });
+
+    it('Should return a ValidationError with invalid Sepa Instrument Request', async () => {
+      try {
+        await cko.instruments.create({});
+      } catch (error) {
+        expect(error).to.be.instanceOf(ValidationError);
+      }
+    });
+  });
+});