def test_linked_list():
w_object = model.W_PointersObject(space, None, 2)
w_last = link(space.w_nil)
w_lb1 = link(w_last)
w_lb2 = link(w_lb1)
w_lb3 = link(w_lb2)
w_lb4 = link(w_lb3)
w_first = link(w_lb4)
linkedlist = wrapper.LinkedListWrapper(space, w_object)
linkedlist.store_first_link(w_first)
linkedlist.store_last_link(w_last)
assert w_first is linkedlist.first_link()
assert w_last is linkedlist.last_link()
assert linkedlist.remove_first_link_of_list() is w_first
assert linkedlist.remove_first_link_of_list() is w_lb4
assert linkedlist.remove_first_link_of_list() is w_lb3
assert not linkedlist.is_empty_list()
assert linkedlist.remove_first_link_of_list() is w_lb2
assert linkedlist.remove_first_link_of_list() is w_lb1
assert linkedlist.remove_first_link_of_list() is w_last
assert linkedlist.is_empty_list()
linkedlist.add_last_link(w_first)
assert linkedlist.first_link() is w_first
assert linkedlist.last_link() is w_first
linkedlist.add_last_link(w_last)
assert linkedlist.first_link() is w_first
assert linkedlist.last_link() is w_last
py.test.raises(WrapperException, linkedlist.remove, space.w_nil)
linkedlist.remove(w_first)
assert linkedlist.first_link() is w_last
linkedlist.store_first_link(w_first)
wrapper.LinkWrapper(space, w_first).store_next_link(w_last)
linkedlist.remove(w_last)
assert linkedlist.last_link() is w_first
def test_accessor_generators():
w_o = model.W_PointersObject(space, None, 1)
w = wrapper.LinkWrapper(space, w_o)
w_o._vars[0] = "hello"
assert w.next_link() == "hello"
w.store_next_link("boe")
assert w.next_link() == "boe"
def link(w_next='foo'):
w_object = model.W_PointersObject(space, None, 1)
wrapper.LinkWrapper(space, w_object).store_next_link(w_next)
return w_object