example.js

async.it('waits to request to finish', function (done) {
  doRequest().then(function (data) {
    expect(data).toEqual('hello world');
    done();
  })
});

jasmine-asyncit.js

var async = (function () {
  function createAsyncVersion (fn) {
    return function () {
      var args = Array.prototype.slice.call(arguments),
      testFunc = args.pop(),
      isDone;
      
      function declareDone () {
        isDone = true;
      }
      
      args.push(function () {
        waitsFor(function () {
          return isDone;
        });
      
        return testFunc(declareDone);
      });
      
      return fn.apply(this, args);
    };
  }
  
  return {
    beforeEach: createAsyncVersion(beforeEach),
    afterEach: createAsyncVersion(afterEach),
    it: createAsyncVersion(it)
  };
}());