add tests for external accounts validator middleware (#1205)

Author: RitikJaiswal75

test/unit/middlewares/external-accounts-validator.test.js

@@ -0,0 +1,37 @@
+const Sinon = require("sinon");
+const { externalAccountData } = require("../../../middlewares/validators/external-accounts");
+const { expect } = require("chai");
+
+describe("Middleware | Validators | external accounts", function () {
+  describe("externalAccountsData", function () {
+    it("allows the request to pass to next function", async function () {
+      const req = {
+        body: {
+          type: "some type",
+          token: "some token",
+          attributes: {},
+        },
+      };
+      const res = {};
+      const nextSpy = Sinon.spy();
+      await externalAccountData(req, res, nextSpy);
+      expect(nextSpy.calledOnce).to.be.equal(true);
+    });
+
+    it("stops the propogation of request to the next function", async function () {
+      const req = {
+        body: {},
+      };
+      const res = {
+        boom: {
+          badRequest: () => {},
+        },
+      };
+      const nextSpy = Sinon.spy();
+      await externalAccountData(req, res, nextSpy).catch((err) => {
+        expect(err).to.be.an.instanceOf(Error);
+      });
+      expect(nextSpy.callCount).to.be.equal(0);
+    });
+  });
+});