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

Event sourced effect management

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

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

    expect(stampEvent(event).meta.timestamp).to.be.a('number')
  })

  it(`Given an event with timestamp in meta
      When stampEvent is called with this event
      Then we get back the same event object without any change
  `, () => {
    const event = {
      type: 'type',
      payload: 'value',
      meta: {
        timestamp: 12345,
      },
    }

    expect(stampEvent(event).meta.timestamp).to.equal(12345)
    expect(stampEvent(event)).to.equal(event)
  })
})