/* global describe it expect beforeEach afterEach spyOn */

var $ = window.jQuery

describe('GOVUK.analyticsPlugins.downloadLinkTracker', function () {
  'use strict'
  var GOVUK = window.GOVUK

  var $links

  beforeEach(function () {
    $links = $(
      '<div class="download-links">' +
        '<a href="/one.pdf">PDF</a>' +
        '<a href="/two.xslt">Spreadsheet</a>' +
        '<a href="/something/uploads/system/three.doc">Document</a>' +
        '<a href="/an/image/link.png"><img src="/img" /></a>' +
      '</div>' +
      '<div class="normal-links">' +
        '<a href="/normal-link">Normal link</a>' +
        '<a href="/another-link">Another link</a>' +
      '</div>'
    )

    $('html').on('click', function (evt) { evt.preventDefault() })
    $('body').append($links)
    GOVUK.analytics = {trackEvent: function () {}}
    GOVUK.analyticsPlugins.downloadLinkTracker({selector: 'a[href$=".pdf"], a[href$=".xslt"], a[href$=".doc"], a[href$=".png"]'})
  })

  afterEach(function () {
    $('html').off()
    $('body').off()
    $links.remove()
    delete GOVUK.analytics
  })

  it('listens to clicks on links that match the selector', function () {
    spyOn(GOVUK.analytics, 'trackEvent')

    $('.download-links a').each(function () {
      $(this).trigger('click')
      expect(GOVUK.analytics.trackEvent).toHaveBeenCalled()
      GOVUK.analytics.trackEvent.calls.reset()
    })

    $('.normal-links a').each(function () {
      $(this).trigger('click')
      expect(GOVUK.analytics.trackEvent).not.toHaveBeenCalled()
      GOVUK.analytics.trackEvent.calls.reset()
    })
  })

  it('listens to click events on elements within download links', function () {
    spyOn(GOVUK.analytics, 'trackEvent')

    $('.download-links a img').trigger('click')
    expect(GOVUK.analytics.trackEvent).toHaveBeenCalledWith('Download Link Clicked', '/an/image/link.png', {transport: 'beacon'})
  })

  it('tracks a download link as an event with link text as the label', function () {
    spyOn(GOVUK.analytics, 'trackEvent')
    $('.download-links a').trigger('click')

    expect(GOVUK.analytics.trackEvent).toHaveBeenCalledWith(
      'Download Link Clicked', '/one.pdf', {label: 'PDF', transport: 'beacon'})
    expect(GOVUK.analytics.trackEvent).toHaveBeenCalledWith(
      'Download Link Clicked', '/two.xslt', {label: 'Spreadsheet', transport: 'beacon'})
    expect(GOVUK.analytics.trackEvent).toHaveBeenCalledWith(
      'Download Link Clicked', '/something/uploads/system/three.doc', {label: 'Document', transport: 'beacon'})
  })
})