react-add-to-calendar/test/add-to-calendar_test.js

import React from 'react'
import ReactDOM from 'react-dom'
import TestUtils from 'react-addons-test-utils'
import AddToCalendar from '../src/ReactAddToCalendar.js'

describe('AddToCalendar', () => {
  it('should show the options menu when the button is clicked', () => {
    var event = {
        title: 'Sample Event',
		description: 'This is the sample event provided as an example only',
		location: 'Portland, OR',
		startTime: '2016-09-16T20:15:00-04:00',
		endTime: '2016-09-16T21:45:00-04:00'
    }
    var addToCalendar = TestUtils.renderIntoDocument(
      <AddToCalendar event={event} />
    )
    var button = TestUtils.findRenderedDOMComponentWithTag(addToCalendar, 'a')
    TestUtils.Simulate.click(ReactDOM.findDOMNode(button))
    var dropdown = TestUtils.findRenderedDOMComponentWithClass(addToCalendar, 'react-add-to-calendar__dropdown')
    expect(dropdown).to.exist
  })

  it('should mount and unmount properly', done => {
    var TestComponent = React.createClass({
      displayName: 'TestComponent',

      getInitialState () {
        return { mounted: true }
      },
      render () {
        return this.state.mounted ? <AddToCalendar /> : null
      }
    })
    var element = TestUtils.renderIntoDocument(<TestComponent />)
    element.setState({ mounted: false }, done)
  })
})