Initial imports and defines.
----
    >>> portal_url =  portal.absolute_url()
    >>> cfolder = portal.cfolder
    >>> cfolder_url = cfolder.absolute_url()
    >>> document01 = portal.document01
    >>> document01_url = document01.absolute_url()
    >>> document02 = portal.document02
    >>> document02_url = document02.absolute_url()
    >>> cart_url = '%s/@@cart' % portal_url

Setting up.
----
    >>> try:
    ...     from Testing.testbrowser import Browser
    ... except ImportError:
    ...     from Products.Five.testbrowser import Browser
    >>> browser = Browser()

For debugging.
----
    >>> browser.handleErrors = True
    >>> portal.error_log._ignored_exceptions = ()

Turn off portlets.
----
    >>> from zope.component import getUtility, getMultiAdapter
    >>> from plone.portlets.interfaces import IPortletManager
    >>> from plone.portlets.interfaces import IPortletAssignmentMapping

    >>> left_column = getUtility(IPortletManager, name=u"plone.leftcolumn")
    >>> left_assignable = getMultiAdapter((portal, left_column), IPortletAssignmentMapping)
    >>> for name in left_assignable.keys():
    ...     del left_assignable[name]

    >>> right_column = getUtility(IPortletManager, name=u"plone.rightcolumn")
    >>> right_assignable = getMultiAdapter((portal, right_column), IPortletAssignmentMapping)
    >>> for name in right_assignable.keys():
    ...     del right_assignable[name]

Log in as the portal owner.
----
    >>> browser.open(portal_url)
    >>> from Products.PloneTestCase.setup import portal_owner, default_password
    >>> browser.open(portal_url + '/login_form?came_from=' + portal_url)
    >>> browser.getControl(name='__ac_name').value = portal_owner
    >>> browser.getControl(name='__ac_password').value = default_password
    >>> browser.getControl(name='submit').click()

    >>> browser.open(portal_url)
    >>> browser.getLink('Site Setup').click()
    >>> browser.getLink('Cart Config').click()

    >>> cfolder.next_incremental_cart_id
    1

#    >>> browser.getControl(name="cart_id_method").value = ['Incremental']
#    >>> browser.getControl(name="form.button.UpdateCartProperties").click()

#    >>> 'value="Incremental"' in browser.contents
#    True

    >>> browser.open(cart_url)
    >>> 'Cart is Empty.' in browser.contents
    True
    >>> browser.open(document01_url)
    >>> browser.getControl(name="form.button.AddToCart").click()

    >>> try:
    ...     browser.open(cart_url)
    ... except:
    ...     print portal.error_log.getLogEntries()[0]['tb_text']
    ...     import pdb; pdb.set_trace()

    >>> browser.open(cart_url)
    >>> 'Cart is Empty.' in browser.contents
    False

    >>> cfolder.next_incremental_cart_id
    2

    >>> browser.open(document01_url)
    >>> browser.getControl(name="form.button.AddToCart").click()
    >>> browser.open(cart_url)
    >>> 'Cart is Empty.' in browser.contents
    False

    >>> cfolder.next_incremental_cart_id
    2

    >>> browser.open(document02_url)
    >>> browser.getControl(name="form.button.AddToCart").click()
    >>> browser.open(cart_url)
    >>> 'Cart is Empty.' in browser.contents
    False

    >>> cfolder.next_incremental_cart_id
    2

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

Go to Product01
----
    >>> cfolder.next_incremental_cart_id
    2
    >>> browser.open(document01_url)
    >>> 'value="18"' in browser.contents
    True
    >>> 'value="19"' in browser.contents
    False
    >>> browser.getControl(name="quantity", index=0).value = ['2']
    >>> browser.getControl(name="form.button.AddToCart").click()
    >>> cfolder['1']
    <Cart at /plone/cfolder/1>
    >>> cfolder.next_incremental_cart_id
    3

Go to cfolder
----
    >>> cart = cfolder['2']
    >>> cart2_url = cart.absolute_url()
    >>> browser.open(cart2_url)
    >>> product1 = cart['1']
    >>> product1_url = product1.absolute_url()
    >>> browser.open(product1_url)
    >>> browser.url
    'http://nohost/plone/cfolder/2/1'

Go to cart
----
    >>> browser.open(cart_url)
    >>> 'value="18"' in browser.contents
    True
    >>> 'value="19"' in browser.contents
    False
    >>> '10.00 EUR' in browser.contents
    True
    >>> 'value="2" selected="selected"' in browser.contents
    True
    >>> '20.00 EUR' in browser.contents
    True

Go to Document02 and add to cart.
----
    >>> browser.open(document02_url)
    >>> 'value="100"' in browser.contents
    True
    >>> 'value="101"' in browser.contents
    False
    >>> browser.getControl(name="quantity", index=0).value = ['3']
    >>> browser.getControl(name="form.button.AddToCart").click()

Go to cart
----
    >>> browser.open(cart_url)
    >>> '10.00 EUR' in browser.contents
    True
    >>> 'value="2" selected="selected"' in browser.contents
    True
    >>> '20.00 EUR' in browser.contents
    True
    >>> '5.00 EUR' in browser.contents
    True
    >>> 'value="3" selected="selected"' in browser.contents
    True
    >>> 'value="100"' in browser.contents
    True
    >>> 'value="101"' in browser.contents
    False
    >>> '15.00 EUR' in browser.contents
    True
    >>> '35.00 EUR' in browser.contents
    True

Go To Next Step
----
    >>> browser.getControl(name="form.button.NextStep").click()
