emoji-mart-lazyload/spec/picker-spec.js

import React from 'react'
import TestUtils from 'react-dom/test-utils'
import Picker from '../src/components/picker'

const { click } = TestUtils.Simulate

const {
  renderIntoDocument,
  scryRenderedComponentsWithType,
  findRenderedComponentWithType,
} = TestUtils

const render = (props = {}) => {
  const defaultProps = {}
  return renderIntoDocument(<Picker {...defaultProps} {...props} />)
}

describe('Picker', () => {
  let subject

  it('works', () => {
    subject = render()
    expect(subject).toBeDefined()
  })

  describe('categories', () => {
    it('shows 10 by default', () => {
      subject = render()
      expect(subject.categories.length).toEqual(10)
    })

    it('will not show some based upon our filter', () => {
      subject = render({ emojisToShowFilter: unified => false })
      expect(subject.categories.length).toEqual(2)
    })

    it('maintains category ids after it is filtered', () => {
      subject = render({emojisToShowFilter: emoji => true});
      const categoriesWithIds = subject.categories.filter(category => category.id);
      expect(categoriesWithIds.length).toEqual(10);
    });
  })
})