Just place these three files in the same directory, along with jquery.js, and launch the testem runner

jasmine-jquery.js

var readFixtures = function() {
  return jasmine.getFixtures().proxyCallTo_('read', arguments)
}

var preloadFixtures = function() {
  jasmine.getFixtures().proxyCallTo_('preload', arguments)
}

var loadFixtures = function() {
  jasmine.getFixtures().proxyCallTo_('load', arguments)
}

var appendLoadFixtures = function() {
  jasmine.getFixtures().proxyCallTo_('appendLoad', arguments)
}

var setFixtures = function(html) {
  jasmine.getFixtures().proxyCallTo_('set', arguments)
}

var appendSetFixtures = function() {
  jasmine.getFixtures().proxyCallTo_('appendSet', arguments)
}

var sandbox = function(attributes) {
  return jasmine.getFixtures().sandbox(attributes)
}

var spyOnEvent = function(selector, eventName) {
  return jasmine.JQuery.events.spyOn(selector, eventName)
}

var preloadStyleFixtures = function() {
  jasmine.getStyleFixtures().proxyCallTo_('preload', arguments)
}

var loadStyleFixtures = function() {
  jasmine.getStyleFixtures().proxyCallTo_('load', arguments)
}

var appendLoadStyleFixtures = function() {
  jasmine.getStyleFixtures().proxyCallTo_('appendLoad', arguments)
}

var setStyleFixtures = function(html) {
  jasmine.getStyleFixtures().proxyCallTo_('set', arguments)
}

var appendSetStyleFixtures = function(html) {
  jasmine.getStyleFixtures().proxyCallTo_('appendSet', arguments)
}

var loadJSONFixtures = function() {
  return jasmine.getJSONFixtures().proxyCallTo_('load', arguments)
}

var getJSONFixture = function(url) {
  return jasmine.getJSONFixtures().proxyCallTo_('read', arguments)[url]
}

jasmine.spiedEventsKey = function (selector, eventName) {
  return [$(selector).selector, eventName].toString()
}

jasmine.getFixtures = function() {
  return jasmine.currentFixtures_ = jasmine.currentFixtures_ || new jasmine.Fixtures()
}

jasmine.getStyleFixtures = function() {
  return jasmine.currentStyleFixtures_ = jasmine.currentStyleFixtures_ || new jasmine.StyleFixtures()
}

jasmine.Fixtures = function() {
  this.containerId = 'jasmine-fixtures'
  this.fixturesCache_ = {}
  this.fixturesPath = 'spec/javascripts/fixtures'
}

jasmine.Fixtures.prototype.set = function(html) {
  this.cleanUp()
  this.createContainer_(html)
}

jasmine.Fixtures.prototype.appendSet= function(html) {
  this.addToContainer_(html)
}

jasmine.Fixtures.prototype.preload = function() {
  this.read.apply(this, arguments)
}

jasmine.Fixtures.prototype.load = function() {
  this.cleanUp()
  this.createContainer_(this.read.apply(this, arguments))
}

jasmine.Fixtures.prototype.appendLoad = function() {
  this.addToContainer_(this.read.apply(this, arguments))
}

jasmine.Fixtures.prototype.read = function() {
  var htmlChunks = []

  var fixtureUrls = arguments
  for(var urlCount = fixtureUrls.length, urlIndex = 0; urlIndex < urlCount; urlIndex++) {
    htmlChunks.push(this.getFixtureHtml_(fixtureUrls[urlIndex]))
  }

  return htmlChunks.join('')
}

jasmine.Fixtures.prototype.clearCache = function() {
  this.fixturesCache_ = {}
}

jasmine.Fixtures.prototype.cleanUp = function() {
  jQuery('#' + this.containerId).remove()
}

jasmine.Fixtures.prototype.sandbox = function(attributes) {
  var attributesToSet = attributes || {}
  return jQuery('<div id="sandbox" />').attr(attributesToSet)
}

jasmine.Fixtures.prototype.createContainer_ = function(html) {
  var container
  if(html instanceof jQuery) {
    container = jQuery('<div id="' + this.containerId + '" />')
    container.html(html)
  } else {
    container = '<div id="' + this.containerId + '">' + html + '</div>'
  }
  jQuery('body').append(container)
}

jasmine.Fixtures.prototype.addToContainer_ = function(html){
  var container = jQuery('body').find('#'+this.containerId).append(html)
  if(!container.length){
    this.createContainer_(html)
  }
}

jasmine.Fixtures.prototype.getFixtureHtml_ = function(url) {
  if (typeof this.fixturesCache_[url] === 'undefined') {
    this.loadFixtureIntoCache_(url)
  }
  return this.fixturesCache_[url]
}

jasmine.Fixtures.prototype.loadFixtureIntoCache_ = function(relativeUrl) {
  var url = this.makeFixtureUrl_(relativeUrl)
  var request = jQuery.ajax({
    type: "GET",
    url: url + "?" + new Date().getTime(),
    async: false
  })
  this.fixturesCache_[relativeUrl] = request.responseText
}

jasmine.Fixtures.prototype.makeFixtureUrl_ = function(relativeUrl){
  return this.fixturesPath.match('/$') ? this.fixturesPath + relativeUrl : this.fixturesPath + '/' + relativeUrl
}

jasmine.Fixtures.prototype.proxyCallTo_ = function(methodName, passedArguments) {
  return this[methodName].apply(this, passedArguments)
}


jasmine.StyleFixtures = function() {
  this.fixturesCache_ = {}
  this.fixturesNodes_ = []
  this.fixturesPath = 'spec/javascripts/fixtures'
}

jasmine.StyleFixtures.prototype.set = function(css) {
  this.cleanUp()
  this.createStyle_(css)
}

jasmine.StyleFixtures.prototype.appendSet = function(css) {
  this.createStyle_(css)
}

jasmine.StyleFixtures.prototype.preload = function() {
  this.read_.apply(this, arguments)
}

jasmine.StyleFixtures.prototype.load = function() {
  this.cleanUp()
  this.createStyle_(this.read_.apply(this, arguments))
}

jasmine.StyleFixtures.prototype.appendLoad = function() {
  this.createStyle_(this.read_.apply(this, arguments))
}

jasmine.StyleFixtures.prototype.cleanUp = function() {
  while(this.fixturesNodes_.length) {
    this.fixturesNodes_.pop().remove()
  }
}

jasmine.StyleFixtures.prototype.createStyle_ = function(html) {
  var style = jQuery('<style></style>').text(html)

  this.fixturesNodes_.push(style)

  jQuery('head').append(style)
}

jasmine.StyleFixtures.prototype.clearCache = jasmine.Fixtures.prototype.clearCache

jasmine.StyleFixtures.prototype.read_ = jasmine.Fixtures.prototype.read

jasmine.StyleFixtures.prototype.getFixtureHtml_ = jasmine.Fixtures.prototype.getFixtureHtml_

jasmine.StyleFixtures.prototype.loadFixtureIntoCache_ = jasmine.Fixtures.prototype.loadFixtureIntoCache_

jasmine.StyleFixtures.prototype.makeFixtureUrl_ = jasmine.Fixtures.prototype.makeFixtureUrl_

jasmine.StyleFixtures.prototype.proxyCallTo_ = jasmine.Fixtures.prototype.proxyCallTo_

/** jasmine json fixtures */

jasmine.getJSONFixtures = function() {
  return jasmine.currentJSONFixtures_ = jasmine.currentJSONFixtures_ || new jasmine.JSONFixtures()
}

jasmine.JSONFixtures = function() {
  this.fixturesCache_ = {}
  this.fixturesPath = 'spec/javascripts/fixtures/json'
}

jasmine.JSONFixtures.prototype.load = function() {
  this.read.apply(this, arguments)
  return this.fixturesCache_
}

jasmine.JSONFixtures.prototype.read = function() {
  var fixtureUrls = arguments
  for(var urlCount = fixtureUrls.length, urlIndex = 0; urlIndex < urlCount; urlIndex++) {
    this.getFixtureData_(fixtureUrls[urlIndex])
  }
  return this.fixturesCache_
}

jasmine.JSONFixtures.prototype.clearCache = function() {
  this.fixturesCache_ = {}
}

jasmine.JSONFixtures.prototype.getFixtureData_ = function(url) {  
  this.loadFixtureIntoCache_(url)
  return this.fixturesCache_[url]
}

jasmine.JSONFixtures.prototype.loadFixtureIntoCache_ = function(relativeUrl) {
  var self = this
  var url = this.fixturesPath.match('/$') ? this.fixturesPath + relativeUrl : this.fixturesPath + '/' + relativeUrl
  jQuery.ajax({
    async: false, // must be synchronous to guarantee that no tests are run before fixture is loaded
    cache: false,
    dataType: 'json',
    url: url,
    success: function(data) {
      console.log("Loading data into " + relativeUrl)
      self.fixturesCache_[relativeUrl] = data
    },
    error: function(jqXHR, status, errorThrown) {
        throw Error('JSONFixture could not be loaded: ' + url + ' (status: ' + status + ', message: ' + errorThrown.message + ')')
    }
  })
}

jasmine.JSONFixtures.prototype.proxyCallTo_ = function(methodName, passedArguments) {
  return this[methodName].apply(this, passedArguments)
}

jasmine.JQuery = function() {}

jasmine.JQuery.browserTagCaseIndependentHtml = function(html) {
  return jQuery('<div/>').append(html).html()
}

jasmine.JQuery.elementToString = function(element) {
  var domEl = $(element).get(0)
  if (domEl == undefined || domEl.cloneNode)
    return jQuery('<div />').append($(element).clone()).html()
  else
    return element.toString()
}

jasmine.JQuery.matchersClass = {}

!function(namespace) {
  var data = {
    spiedEvents: {},
    handlers:    []
  }

  namespace.events = {
    spyOn: function(selector, eventName) {
      var handler = function(e) {
        data.spiedEvents[jasmine.spiedEventsKey(selector, eventName)] = e
      }
      jQuery(selector).bind(eventName, handler)
      data.handlers.push(handler)
      return {
        selector: selector,
        eventName: eventName,
        handler: handler,
        reset: function(){
          delete data.spiedEvents[jasmine.spiedEventsKey(selector, eventName)]
        }
      }
    },

    wasTriggered: function(selector, eventName) {
      return !!(data.spiedEvents[jasmine.spiedEventsKey(selector, eventName)])
    },

    wasPrevented: function(selector, eventName) {
      return data.spiedEvents[jasmine.spiedEventsKey(selector, eventName)].isDefaultPrevented()
    },

    cleanUp: function() {
      data.spiedEvents = {}
      data.handlers    = []
    }
  }
}(jasmine.JQuery)

!function(){
  var jQueryMatchers = {
    toHaveClass: function(className) {
      return this.actual.hasClass(className)
    },

    toHaveCss: function(css){
      for (var prop in css){
        if (this.actual.css(prop) !== css[prop]) return false
      }
      return true
    },

    toBeVisible: function() {
      return this.actual.is(':visible')
    },

    toBeHidden: function() {
      return this.actual.is(':hidden')
    },

    toBeSelected: function() {
      return this.actual.is(':selected')
    },

    toBeChecked: function() {
      return this.actual.is(':checked')
    },

    toBeEmpty: function() {
      return this.actual.is(':empty')
    },

    toExist: function() {
      return $(document).find(this.actual).length
    },

    toHaveAttr: function(attributeName, expectedAttributeValue) {
      return hasProperty(this.actual.attr(attributeName), expectedAttributeValue)
    },

    toHaveProp: function(propertyName, expectedPropertyValue) {
      return hasProperty(this.actual.prop(propertyName), expectedPropertyValue)
    },

    toHaveId: function(id) {
      return this.actual.attr('id') == id
    },

    toHaveHtml: function(html) {
      return this.actual.html() == jasmine.JQuery.browserTagCaseIndependentHtml(html)
    },

    toContainHtml: function(html){
      var actualHtml = this.actual.html()
      var expectedHtml = jasmine.JQuery.browserTagCaseIndependentHtml(html)
      return (actualHtml.indexOf(expectedHtml) >= 0)
    },

    toHaveText: function(text) {
      var trimmedText = $.trim(this.actual.text())
      if (text && jQuery.isFunction(text.test)) {
        return text.test(trimmedText)
      } else {
        return trimmedText == text
      }
    },

    toHaveValue: function(value) {
      return this.actual.val() == value
    },

    toHaveData: function(key, expectedValue) {
      return hasProperty(this.actual.data(key), expectedValue)
    },

    toBe: function(selector) {
      return this.actual.is(selector)
    },

    toContain: function(selector) {
      return this.actual.find(selector).length
    },

    toBeDisabled: function(selector){
      return this.actual.is(':disabled')
    },

    toBeFocused: function(selector) {
      return this.actual.is(':focus')
    },

    toHandle: function(event) {

      var events = $._data(this.actual.get(0), "events")

      if(!events || !event || typeof event !== "string") {
        return false
      }

      var namespaces = event.split(".")
      var eventType = namespaces.shift()
      var sortedNamespaces = namespaces.slice(0).sort()
      var namespaceRegExp = new RegExp("(^|\\.)" + sortedNamespaces.join("\\.(?:.*\\.)?") + "(\\.|$)")

      if(events[eventType] && namespaces.length) {
        for(var i = 0; i < events[eventType].length; i++) {
          var namespace = events[eventType][i].namespace
          if(namespaceRegExp.test(namespace)) {
            return true
          }
        }
      } else {
        return events[eventType] && events[eventType].length > 0
      }
    },

    // tests the existence of a specific event binding + handler
    toHandleWith: function(eventName, eventHandler) {
      var stack = $._data(this.actual.get(0), "events")[eventName]
      for (var i = 0; i < stack.length; i++) {
        if (stack[i].handler == eventHandler) return true
      }
      return false
    }
  }

  var hasProperty = function(actualValue, expectedValue) {
    if (expectedValue === undefined) return actualValue !== undefined
    return actualValue == expectedValue
  }

  var bindMatcher = function(methodName) {
    var builtInMatcher = jasmine.Matchers.prototype[methodName]

    jasmine.JQuery.matchersClass[methodName] = function() {
      if (this.actual
        && (this.actual instanceof jQuery
          || jasmine.isDomNode(this.actual))) {
            this.actual = $(this.actual)
            var result = jQueryMatchers[methodName].apply(this, arguments)
            var element
            if (this.actual.get && (element = this.actual.get()[0]) && !$.isWindow(element) && element.tagName !== "HTML")
              this.actual = jasmine.JQuery.elementToString(this.actual)
            return result
          }

          if (builtInMatcher) {
            return builtInMatcher.apply(this, arguments)
          }

          return false
    }
  }

  for(var methodName in jQueryMatchers) {
    bindMatcher(methodName)
  }
}()

beforeEach(function() {
  this.addMatchers(jasmine.JQuery.matchersClass)
  this.addMatchers({
    toHaveBeenTriggeredOn: function(selector) {
      this.message = function() {
        return [
          "Expected event " + this.actual + " to have been triggered on " + selector,
          "Expected event " + this.actual + " not to have been triggered on " + selector
        ]
      }
      return jasmine.JQuery.events.wasTriggered(selector, this.actual)
    }
  })
  this.addMatchers({
    toHaveBeenTriggered: function(){
      var eventName = this.actual.eventName,
          selector = this.actual.selector
      this.message = function() {
        return [
          "Expected event " + eventName + " to have been triggered on " + selector,
          "Expected event " + eventName + " not to have been triggered on " + selector
        ]
      }
      return jasmine.JQuery.events.wasTriggered(selector, eventName)
     }
  })
  this.addMatchers({
    toHaveBeenPreventedOn: function(selector) {
      this.message = function() {
        return [
          "Expected event " + this.actual + " to have been prevented on " + selector,
          "Expected event " + this.actual + " not to have been prevented on " + selector
        ]
      }
      return jasmine.JQuery.events.wasPrevented(selector, this.actual)
    }
  })
  this.addMatchers({
    toHaveBeenPrevented: function() {
      var eventName = this.actual.eventName,
          selector = this.actual.selector
      this.message = function() {
        return [
          "Expected event " + eventName + " to have been prevented on " + selector,
          "Expected event " + eventName + " not to have been prevented on " + selector
        ]
      }
      return jasmine.JQuery.events.wasPrevented(selector, eventName)
    }
  })
})

afterEach(function() {
  jasmine.getFixtures().cleanUp()
  jasmine.getStyleFixtures().cleanUp()
  jasmine.JQuery.events.cleanUp()
})

test.spec.js

describe("window onError bug", function() {
   
    it("should raise a JSON circular reference exception", function() {
        jQuery(window).trigger(jQuery.Event("error"));
    });
    
});

testem.json

{
    "framework": "jasmine",
    "src_files": [
        "jquery.min.js",
        "jasmine-jquery.js",
        "test.spec.js"
    ]
}