recurlybot/test/infrastructure/slack/slack_spec.js

Slack bot to notify new Recurly subscriptions

require('should');
const sinon = require('sinon');

const createSlack = require(`${specHelper.srcPath}infrastructure/slack/slack`);

describe('Slack API wrapper', () => {
  function createIncomingWebhookDummy(err, result) {
    function IncomingWebhook() {}
    IncomingWebhook.prototype.send = () => new Promise((resolve) => { resolve(result); });
    return new IncomingWebhook();
  }

  context('Interface', () => {
    const incomingWebhookDummy = createIncomingWebhookDummy(null, {});
    const slack = createSlack(incomingWebhookDummy);
    it('should have the "send" method', () => {
      slack.send.should.be.a.Function();
    });
  });

  context('Behaviour', () => {
    it('should send a message to the specified channel', async () => {
      const incomingWebhookDummy = createIncomingWebhookDummy(null, {});
      const slack = createSlack(incomingWebhookDummy);
      const spy = sinon.spy(incomingWebhookDummy, 'send');

      const channel = 'channel';
      const pretext = 'pre';
      const text = 'hello world';
      const msg = {
        attachments: [{ pretext, text }]
      };
      slack.send(channel, msg);
      const expectedMsg = {
        channel,
        attachments: [{
          pretext,
          text
        }]
      };
      spy.calledWith(expectedMsg).should.be.ok();
    });
  });
});