transform.spec.js

'use strict'

const { stub } = require('sinon')
const { handleLog } = require('./transform.js')
const logger = require('./logger.js')
const { expect } = require('@hapi/code')

describe('transform', () => {
  describe('#handleLog()', () => {
    const time = new Date().getTime()
    const msg = {
      level: 5,
      time,
      pid: 0,
      hostname: 'localhost',
      msg: 'foo',
      bar: 'baz',
      context: {
        runtime: {
          file: 'foo.js',
          method: 'bar()'
        }
      }
    }

    const cb = stub()

    beforeEach(() => {
      stub(logger, 'log')
      handleLog(msg, cb)
    })

    afterEach(() => {
      logger.log.restore()
    })

    it('has called callback', () => {
      expect(
        cb.callCount
      ).to.equal(1)
    })

    it('has called logger', () => {
      expect(
        logger.log.callCount
      ).to.equal(1)
    })

    it('has passed correct arguments to logger', () => {
      expect(
        logger.log.firstCall.args
      ).to.equal(
        [
          'foo',
          'info',
          {
            bar: 'baz',
            context: {
              system: {
                hostname: 'localhost',
                pid: 0
              },
              runtime: {
                file: 'foo.js',
                method: 'bar()'
              }
            }
          }
        ]
      )
    })
  })
})