Log in as Manager::

    >>> browser.login(TEST_USER_NAME, TEST_USER_PASSWORD)

Make Folder 'Shop' into Shop::

    >>> browser.open('/shop')
    >>> browser.getLink('Make Shopping Site').click()

Log out::

    >>> browser.getLink('Log out').click()

Go to @@billing-and-shipping

    >>> browser.open('/shop/@@billing-and-shipping')
    >>> browser.url
    'http://nohost/plone/shop/@@cart'
