@coriolis/coriolis/src/test/lib/event/preventEventLoops.spec.js

Event sourced effect management

import { preventEventLoops } from '../../../lib/event/preventEventLoops'

describe('preventEventLoops', () => {
  it(`Given an event
      When preventEventLoops is called with a new event
      Then we get a new event object with a unique meta property
  `, () => {
    const event = {
      type: 'type',
      payload: 'value',
    }

    expect(preventEventLoops('key')(event)).to.deep.equal({
      ...event,
      meta: {
        key: true,
      },
    })
  })

  it(`Given an event
      When preventEventLoops is called with a event that was returned by a previous call to preventEventLoops
      Then we get an exception
  `, () => {
    const event = {
      type: 'type',
      payload: 'value',
    }

    const loppProtectedEvent = preventEventLoops('key')(event)

    expect(() => preventEventLoops('key')(loppProtectedEvent)).to.throw()
  })
})