react-timelines/src/components/Timeline/Grid/__tests__/index.jsx

React Timelines

import React from 'react'
import { shallow } from 'enzyme'

import Grid from '..'
import createTime from '../../../../utils/time'

const time = createTime({
  start: new Date('2017-01-01T00:00:00.000Z'),
  end: new Date('2017-01-30T00:00:00.000Z'),
  zoom: 10, // 10px === 1 day
})

const grid = [
  {
    id: '1',
    start: new Date('2017-01-01T00:00:00.000Z'),
    end: new Date('2017-01-06T00:00:00.000Z'),
  },
  {
    id: '2',
    start: new Date('2017-01-06T00:00:00.000Z'),
    end: new Date('2017-01-11T00:00:00.000Z'),
  },
  {
    id: '3',
    start: new Date('2017-01-11T00:00:00.000Z'),
    end: new Date('2017-01-16T00:00:00.000Z'),
  },
]

describe('<Grid />', () => {
  it('renders grid cells, the styling of each repesenting the start and end dates in the grid prop', () => {
    const getItemStyle = (wrapper, i) => wrapper.find('.rt-grid__cell').get(i).props.style

    const wrapper = shallow(<Grid time={time} grid={grid} />)
    expect(getItemStyle(wrapper, 0)).toEqual({ left: '0px', width: '50px' })
    expect(getItemStyle(wrapper, 1)).toEqual({ left: '50px', width: '50px' })
    expect(getItemStyle(wrapper, 2)).toEqual({ left: '100px', width: '50px' })
  })
})