mocha test api with json schema

const myApp = require('../server.js');
const request = require('supertest')(myApp);
const chai = require('chai');

chai.use(require('chai-json-schema'))
const expect = chai.expect;

describe('serverApi', function () {

  const postBody = { pvtKey: "9a8de2c8850f5c499e06596dae72302968c2b919870cb884062198f4ff7a7a83" };
  const result = {
    type: 'object',
    required:[ 'privateKey', 'publicKey'],
    properties: {
      privateKey: {type: 'string', pattern: "^[0-9a-zA-Z]+$"},
      publicKey:  {type: 'string', pattern: "^[0-9a-zA-Z]+$"},
    }
  };
  
  it('returns a json with publicKey and address', function (done) {
    request
      .post('/web3/createNewKeys')
      .type('form')
      .send(postBody)
      .expect(200)
      .expect(res=>{
        expect(res.body).to.be.jsonSchema(apiSchema(result));     
      })
      .end(done)
  });
});

const apiSchema = (resultSchema) => ({
  title: 'Api response schema',
  type: 'object',
  required: ['result'],
  properties: {
    result: resultSchema
  }
})