Test that embeds database and executes query on it.

database.test.ts

import * as knex from 'knex';
import * as Docker from 'dockerode';
import { sleep } from '../util/time';
import { waitForDatabase } from '../test/waitForDatabase';

const docker = new Docker({ socketPath: '/var/run/docker.sock' });

let dbContainer: Docker.Container;
let knexClient: knex;

beforeAll(async () => {
  dbContainer = await docker.createContainer({
    Image: 'pldin601/postgres:latest',
    Env: ['POSTGRES_USER=coins', 'POSTGRES_PASSWORD=coins', 'POSTGRES_DB=coins'],
    ExposedPorts: {
      '5432/tcp': {},
    },
    HostConfig: {
      PortBindings: { '5432/tcp': [{ HostPort: '' }] },
    },
  });

  await dbContainer.start();

  const { NetworkSettings: { Ports } } = await dbContainer.inspect();

  const port = Ports['5432/tcp'][0].HostPort;

  knexClient = knex({
    client: 'postgresql',
    connection: {
      host: '127.0.0.1',
      user: 'coins',
      password: 'coins',
      database: 'coins',
      port,
    },
  });

  await waitForDatabase(knexClient);
}, 15000);

test('Return correct time from database', async () => {
  const result = await knexClient.select(knexClient.raw('NOW() as time')).first();
  console.log(result['time']);
});

afterAll(async () => {
  await dbContainer.kill();
  await dbContainer.remove();
});