probot/test/robot.js

const EventEmitter = require('events').EventEmitter;
const expect = require('expect');
const Context = require('../lib/context');
const createRobot = require('../lib/robot');

describe('Robot', () => {
  let webhook;
  let robot;

  beforeEach(() => {
    webhook = new EventEmitter();
    robot = createRobot({}, webhook);
  });

  describe('on', () => {
    it('calls the callback', () => {
      const spy = expect.createSpy();
      const event = {};

      robot.on('test', spy);
      expect(spy).toNotHaveBeenCalled();
      webhook.emit('test', event);
      expect(spy).toHaveBeenCalled();
      expect(spy.calls[0].arguments[0]).toBe(event);
      expect(spy.calls[0].arguments[1]).toBeA(Context);
    });

    it('emits event with acton', () => {
      const spy = expect.createSpy();

      robot.on('test.bar', spy);
      webhook.emit('test', {payload: {action: 'foo'}});
      expect(spy).toNotHaveBeenCalled();
      webhook.emit('test', {payload: {action: 'bar'}});
      expect(spy).toHaveBeenCalled();
    });
  });
});