How to write unit test for postgresql database on nodejs

I am trying to write test for my API with postgresql.

It seem the test is not hitting the right database for response or maybe my configuration is not proper for the test.

I expect the test to check my token and treat as req from a body but the test is not even recognizing the request body (req.body);

Please I need guidance.

my files are as below. test.js

/* global describe it */
import chai, { expect, assert } from 'chai';

import chaiHttp from 'chai-http';

import jwt from 'jsonwebtoken';

import server from '../app/app';

import parties from '../db/dummy';

process.env.NODE_ENV = 'test';

chai.should();
chai.use(chaiHttp);

const token = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MSwiZW1haWwiOiJ0b3NpbkB5YWhvby5jb20iLCJpc19hZG1pbiI6dHJ1ZSwiaWF0IjoxNTQ5Mjc3MzAxLCJleHAiOjE1NDkzNjM3MDF9.ZJl147IVpw3TakPnR4uw_y6ZQZ6-Heoup5bdBBPs0iE';
const decoded = jwt.verify(token, process.env.SECRET_KEY);

describe('POST/api/v1/parties', () => {
  it('should return 201 for new party', (done) => {
    const newParty = {
      name: 'APGC',
      hqAddress: '1 Iyana Iba ',
      logoUrl: 'www.logo.net.png',
      decoded,
    };
    chai.request(server)
      .post('/api/v1/parties')
      .type('form')
      .send(newParty)
      .end((err, res) => {
        expect(decoded).be.a('string');
        expect(res.body).to.have.property('data');
        assert.isOk(res.body);
      });
    done();
  });
 });

my package.json

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "test": "nyc mocha --compilers js:@babel/register server/test/*.spec.js --exit",
    "start:dev": "npm run build && npm run serve",
    "start": "nodemon --exec babel-node server/app/app.js",
    "heroku": "node server/app/app.js",
    "build": "babel server -d lib",
    "serve": "node lib/app/app.js",
    "coverage": "nyc report --reporter=text-lcov | coveralls",
    "migration": "psql -U postgres -p 5433 -f server/model/table.sql",
    "seed": "babel-node server/model/seeding.js",
    "data:dev": "npm run migration && npm run seed"
  },
  "author": "darot",
  "license": "ISC",
  "dependencies": {
    "bcryptjs": "^2.4.3",
    "body-parser": "^1.18.3",
    "dotenv": "^6.2.0",
    "express": "^4.16.4",
    "express-jwt": "^5.3.1",
    "jsonwebtoken": "^8.4.0",
    "morgan": "^1.9.1",
    "pg": "^7.8.0"
  },
  "devDependencies": {
    "@babel/cli": "^7.2.3",
    "@babel/core": "^7.2.2",
    "@babel/node": "^7.0.0",
    "@babel/preset-env": "^7.3.1",
    "@babel/register": "^7.0.0",
    "babel-eslint": "^10.0.1",
    "babel-jest": "^24.0.0",
    "babel-loader": "^8.0.5",
    "babel-preset-env": "^1.7.0",
    "babel-register": "^6.26.0",
    "chai": "^4.2.0",
    "chai-http": "^4.2.1",
    "codecov": "^3.1.0",
    "coveralls": "^3.0.2",
    "cross-env": "^5.2.0",
    "eslint": "^5.12.1",
    "eslint-config-airbnb-base": "^13.1.0",
    "eslint-plugin-import": "^2.15.0",
    "istanbul": "^0.4.5",
    "mocha": "^5.2.0",
    "nodemon": "^1.18.9",
    "nyc": "^13.1.0",
    "travis": "^0.1.1"
  }
}

my database config

import pg from 'pg';

import dotenv from 'dotenv';

dotenv.config();

process.env.NODE_ENV = 'test';

let connection;
const string = {
  user: process.env.DB_USER,
  host: process.env.DB_HOST,
  database: process.env.DB_NAME,
  password: process.env.DB_PASS,
  port: process.env.DB_PORT,
  max: 10,
  idleTimeoutMillis: 3000,
};
const stringTest = {
  user: process.env.DB_USER,
  host: process.env.DB_HOST,
  database: process.env.DB_NAME2,
  password: process.env.DB_PASS,
  port: process.env.DB_PORT,
  max: 10,
  idleTimeoutMillis: 3000,
};
if (process.env.NODE_ENV === 'production') {
  connection = {
    connectionString: process.env.DATABASE_URL,
    ssl: true,
  };
} else if (process.env.NODE_ENV === 'test') {
  connection = stringTest;
} else {
  connection = string;
}
const pool = new pg.Pool(connection);

export default pool;