Using jest-json-schema

session-history.js

const moment = require('moment');

const { URL_SESSION_HISTORY } = require('../../src/constants/urls');
const { STATUS_OK } = require('../../src/constants/used-http-status-codes');
const mocker = require('../../dev-helpers/testing/mocker');

const handler = mocker((req, res) =>
  res.status(STATUS_OK).send({
    sessions: [
      {
        id: 5433,
        starts_at: moment()
          .utc()
          .subtract({
            hours: 4,
            minutes: 24,
            seconds: 37
          })
          .toISOString(),
        durationSeconds: moment.duration(1, 'hours').asSeconds(),
        adminEdited: false
      },
      {
        id: 567,
        starts_at: moment()
          .utc()
          .subtract({
            hours: 2,
            minutes: 24,
            seconds: 37
          })
          .toISOString(),
        durationSeconds: moment.duration(1, 'hours').asSeconds(),
        adminEdited: false
      }
    ]
  })
);

const sessionHistory = app => app.get(URL_SESSION_HISTORY, handler);

module.exports = { sessionHistory, handler };

session-history.spec.js

const request = require('supertest');
const express = require('express');
const {matchers} = require('jest-json-schema');

const { URL_SESSION_HISTORY } = require('../../src/constants/urls');
const itTriggersEndpointHandler = require('../../dev-helpers/testing/it-triggers-endpoint-handler');

expect.extend(matchers);

describe('sessionHistory', () => {
  const { sessionHistory, handler } = require('./session-history');
  const app = sessionHistory(express());

  itTriggersEndpointHandler(app, handler, URL_SESSION_HISTORY, `calls handler`);

  it(`gives expected response`, done => {
    const schema = {
      properties: {
        sessions: {
          type: 'array',
          items: {
            properties: {
              id: {
                type: 'number'
              },
              starts_at: {
                type: 'string',
                format: "date-time"
              },
              durationSeconds: {
                type: 'number'
              },
              adminEdited: {
                type: 'boolean'
              },
            },
            required: ['id', 'starts_at', 'durationSeconds', 'adminEdited']
          },
        },
      },
      required: ['sessions']
    };

    request(app)
      .get(URL_SESSION_HISTORY)
      .expect(({ text }) => {
        expect(JSON.parse(text)).toMatchSchema(schema);
      })
      .end(done);
  });
});