Complete files for my article, Testing Hapi.js APIs. https://sethlopez.me/article/testing-hapi-js-apis

package.json

{
  "name": "testing-hapi-js-apis",
  "version": "1.0.0",
  "license": "MIT",
  "scripts": {
    "test": "ava --verbose test.js"
  },
  "dependencies": {
    "ava": "^0.16.0",
    "hapi": "^15.1.1"
  }
}

server.js

const Hapi = require('hapi');
const server = new Hapi.Server();

server.connection({ port: 8080 });
server.route({
  method: 'POST',
  path: '/subscribe',
  handler: (request, reply) => {
    if (!request.payload.email) {
      return reply({
        result: 'failure',
        message: 'Email address is required.'
      }).code(400);
    } else if (!/@/.test(request.payload.email)) {
      return reply({
        result: 'failure',
        message: 'Invalid email address.'
      }).code(400);
    }
    
    // persist the email address
    // ...

    return reply({
      result: 'success',
      message: 'Subscription successful.'
    });
  }
});

if (!module.parent) {
  server.start(error => {
    process.exit(1);
  });
}

module.exports = server;

test.js

import test from 'ava';
import server from './server';

const requestDefaults = {
  method: 'POST',
  url: '/subscribe',
  payload: {}
};

test('endpoint test | POST /subscribe | empty payload -> 400 Bad Request', t => {
  const request = Object.assign({}, requestDefaults);

  return server.inject(request)
    .then(response => {
      t.is(response.statusCode, 400, 'status code is 400');
    });
});

test('endpoint test | POST /subscribe | invalid email address -> 400 Bad Request', t => {
  const request = Object.assign({}, requestDefaults, {
    payload: {
      email: 'a'
    }
  });

  return server.inject(request)
    .then(response => {
      t.is(response.statusCode, 400, 'status code is 400');
    });
});

test('endpoint test | POST /subscribe | valid email address -> 200 OK', t => {
  const request = Object.assign({}, requestDefaults, {
    payload: {
      email: 'test@example.com'
    }
  });

  return server.inject(request)
    .then(response => {
      t.is(response.statusCode, 200, 'status code is 200');
    });
});