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Starting with version 2.0, this file "boots" Jasmine, performing all of the necessary initialization before executing the loaded environment and all of a project's specs. This file should be loaded after jasmine.js and jasmine_html.js, but before any project source files or spec files are loaded. Thus this file can also be used to customize Jasmine for a project.

If a project is using Jasmine via the standalone distribution, this file can be customized directly. If a project is using Jasmine via the Ruby gem, this file can be copied into the support directory via jasmine copy_boot_js. Other environments (e.g., Python) will have different mechanisms.

The location of boot.js can be specified and/or overridden in jasmine.yml.

(function() {

Require & Instantiate

Require Jasmine's core files. Specifically, this requires and attaches all of Jasmine's code to the jasmine reference.

  window.jasmine = jasmineRequire.core(jasmineRequire);

Since this is being run in a browser and the results should populate to an HTML page, require the HTML-specific Jasmine code, injecting the same reference.


Create the Jasmine environment. This is used to run all specs in a project.

  var env = jasmine.getEnv();

The Global Interface

Build up the functions that will be exposed as the Jasmine public interface. A project can customize, rename or alias any of these functions as desired, provided the implementation remains unchanged.

  var jasmineInterface = {
    describe: function(description, specDefinitions) {
      return env.describe(description, specDefinitions);

    xdescribe: function(description, specDefinitions) {
      return env.xdescribe(description, specDefinitions);

    it: function(desc, func) {
      return env.it(desc, func);

    xit: function(desc, func) {
      return env.xit(desc, func);

    beforeEach: function(beforeEachFunction) {
      return env.beforeEach(beforeEachFunction);

    afterEach: function(afterEachFunction) {
      return env.afterEach(afterEachFunction);

    expect: function(actual) {
      return env.expect(actual);

    pending: function() {
      return env.pending();

    spyOn: function(obj, methodName) {
      return env.spyOn(obj, methodName);

    addCustomEqualityTester: function(tester) {

    jsApiReporter: new jasmine.JsApiReporter({
      timer: new jasmine.Timer()

Add all of the Jasmine global/public interface to the proper global, so a project can use the public interface directly. For example, calling describe in specs instead of jasmine.getEnv().describe.

  if (typeof window == "undefined" && typeof exports == "object") {
    extend(exports, jasmineInterface);
  } else {
    extend(window, jasmineInterface);

Expose the interface for adding custom equality testers.

  jasmine.addCustomEqualityTester = function(tester) {

Expose the interface for adding custom expectation matchers

  jasmine.addMatchers = function(matchers) {
    return env.addMatchers(matchers);

Expose the mock interface for the JavaScript timeout functions

  jasmine.clock = function() {
    return env.clock;

Runner Parameters

More browser specific code - wrap the query string in an object and to allow for getting/setting parameters from the runner user interface.

  var queryString = new jasmine.QueryString({
    getWindowLocation: function() { return window.location; }

  var catchingExceptions = queryString.getParam("catch");
  env.catchExceptions(typeof catchingExceptions === "undefined" ? true : catchingExceptions);


The HtmlReporter builds all of the HTML UI for the runner page. This reporter paints the dots, stars, and x's for specs, as well as all spec names and all failures (if any).

  var htmlReporter = new jasmine.HtmlReporter({
    env: env,
    queryString: queryString,
    onRaiseExceptionsClick: function() { queryString.setParam("catch", !env.catchingExceptions()); },
    getContainer: function() { return document.body; },
    createElement: function() { return document.createElement.apply(document, arguments); },
    createTextNode: function() { return document.createTextNode.apply(document, arguments); },
    timer: new jasmine.Timer()

The jsApiReporter also receives spec results, and is used by any environment that needs to extract the results from JavaScript.


Filter which specs will be run by matching the start of the full name against the spec query param.

  var specFilter = new jasmine.HtmlSpecFilter({
    filterString: function() { return queryString.getParam("spec"); }

  env.specFilter = function(spec) {
    return specFilter.matches(spec.getFullName());


Replace the browser window's onload, ensure it's called, and then run all of the loaded specs. This includes initializing the HtmlReporter instance and then executing the loaded Jasmine environment. All of this will happen after all of the specs are loaded.

  var currentWindowOnload = window.onload;

  window.onload = function() {
    if (currentWindowOnload) {

Helper function for readability above.

  function extend(destination, source) {
    for (var property in source) destination[property] = source[property];
    return destination;