add unit test

app/tests/auth.spec.js

@@ -0,0 +1,18 @@
+const request = require('supertest');
+const chai = require('chai');
+const expect = chai.expect;
+
+describe('Post /api/auth/sign_up', () => {
+    it('Создание нового аккаунта(успешно)', async () => {
+        const res = await request('localhost:8080')
+            .post('/api/auth/sign_up')
+            .send({
+                username: "mod",
+                email: "test@test.com",
+                password: "123",
+                roles: ["user", "moderator"]
+            });
+        expect(res.statusCode).equal(200);
+        expect(res.body).to.deep.equal({ message: 'Регистрация пользователя прошла успешно' });
+    });
+});