Bootstrap/js/tests/unit/scrollspy.js

$(function () {

  module('scrollspy')

  test('should provide no conflict', function () {
    var scrollspy = $.fn.scrollspy.noConflict()
    ok(!$.fn.scrollspy, 'scrollspy was set back to undefined (org value)')
    $.fn.scrollspy = scrollspy
  })

  test('should be defined on jquery object', function () {
    ok($(document.body).scrollspy, 'scrollspy method is defined')
  })

  test('should return element', function () {
    ok($(document.body).scrollspy()[0] == document.body, 'document.body returned')
  })

  test('should switch active class on scroll', function () {
    var sectionHTML = '<div id="masthead"></div>',
        $section = $(sectionHTML).append('#qunit-fixture'),
        topbarHTML = '<div class="topbar">' +
        '<div class="topbar-inner">' +
        '<div class="container">' +
        '<h3><a href="#">Bootstrap</a></h3>' +
        '<li><a href="#masthead">Overview</a></li>' +
        '</ul>' +
        '</div>' +
        '</div>' +
        '</div>',
        $topbar = $(topbarHTML).scrollspy()

    ok($topbar.find('.active', true))
  })

})