old_contents: /* eslint-env node, jest */
  const index = require('../../../tasks/slack/index')
  
  describe('#init', () => {
    it('init', async () => {
      expect('1').toEqual('1')
    })
  })
  
new_contents: /* eslint-env node, jest */
  const index = require('../../../tasks/slack/index')
  
  describe('#init', () => {
    it('init', async () => {
      expect(true).toEqual(true)
    })
  })
  
subject: Add first test