Mocking jQuery.ajax with Sinon.JS

gistfile1.js

describe("SinonMockJQAjaxWithJasmine", function() {
  it("should mock a jQuery ajax request", sinon.test(function () {
    this.mock(jQuery).expects("ajax").once();

    jQuery.ajax({
      url: "/something"
    });
  }));

  it("should fail when expectations are not met", sinon.test(function () {
    this.mock(jQuery).expects("ajax").twice();

    jQuery.ajax({
      url: "/something"
    });
  }));
});