watcher_component_test.spec.js

describe('Watcher component', () => {
  let props
  
  beforeEach(() => {
    props = {
      propId: 1
    }
  })

  describe('Watcher', () => {
    it('propId', done => { 
      const wrapper = shallow(WatcherComponent, {
        propsData: props
      })
      
      const consoleLogValueStub = sinon.stub(wrapper.vm, 'consoleLogValue')
  
      wrapper.setProps({
        propId: 2
      })

      expect(consoleLogValueStub).to.be.calledWith(2)

      consoleLogValueStub.restore()
      done() 
    })
  })
})