Just replaced 99% of what I use jasmine-jquery for in 10 lines.

jasmine-jquery-lite.js

beforeEach(function() {
  this.addMatchers({
    toIs: function(selector) {
      return this.actual.is(selector);
    },
    toHas: function(selector) {
      return this.actual.find(selector).length > 0;
    }
  });
});

/* examples:
    expect($result).toIs('div.pants');  //it should match this. uses is()
    expect($container).toHas('.fax');  //check for children that match this. uses find()
*/