@impargo/react-here-maps/tests/utils/get-dom-marker-icon.test.ts

React.js HERE Maps component

import getDomMarkerIcon, { DomIcons } from '../../src/utils/get-dom-marker-icon'

describe('<HEREMap />', () => {
  describe('#getDomMarkerIcon(html: string): H.map.DomIcon', () => {
    beforeEach(() => {
      DomIcons.clear()
    })

    it('should create a new dom icon instance if one does not exist', () => {
      const html: string = '<div class=\'dom-marker\'><div class=\'circle-marker\' /></div>'

      // test we get an icon instance
      const icon: H.map.DomIcon = getDomMarkerIcon(html)
      expect(icon).toBeInstanceOf(H.map.DomIcon)
    })

    it('should add the new dom icon instance to the map', () => {
      const html: string = '<div class=\'dom-marker\'><div class=\'circle-marker\' /></div>'

      // expect the map size to be zero
      expect(DomIcons.size).toEqual(0)

      // get an icon instance
      getDomMarkerIcon(html)

      // test that the size has increased by one
      expect(DomIcons.size).toEqual(1)
    })

    it('shouldn\'t create two dom icons for the same bitmap', () => {
      const html: string = '<div class=\'dom-marker\'><div class=\'circle-marker\' /></div>'

      // get an icon instance
      getDomMarkerIcon(html)

      // test that the size has increased to one
      expect(DomIcons.size).toEqual(1)

      // get a second icon instance
      getDomMarkerIcon(html)

      // test that the size is still one
      expect(DomIcons.size).toEqual(1)
    })
  })
})