Calling beforeEach and afterEach with nested describe blocks

To accomplish this I define a common function and then refer to it in the beforeAll/afterAll of each nested describe.

describe('Wrapper', function() {
  var _startup = function(done) {
    login();
    window.setTimeout(done, 150);
  };

  var _shutdown = function() {
    logout();
  };

  describe('Inner 1', function() {
    beforeAll(_startup);
    afterAll(_shutdown);
  });

  describe('Inner 2', function() {
    beforeAll(_startup);
    afterAll(_shutdown);
  });

  describe('Inner 3', function() {
    beforeAll(_startup);
    afterAll(_shutdown);
  });
});

It seems to be cleanest solution available.