def test_pagination_4() -> None:
p = Pagination(10, 10, 100)
pages = list(p.iter_pages())
assert pages == [1, 2, None, 8, 9, 10]
assert p.has_prev
assert not p.has_next
assert p.prev == 9
assert p.next is None
def test_pagination_3() -> None:
p = Pagination(1, 10, 100)
pages = list(p.iter_pages())
assert pages == [1, 2, 3, 4, 5, None, 9, 10]
assert not p.has_prev
assert p.has_next
assert p.prev is None
assert p.next == 2
def test_pagination_1() -> None:
p = Pagination(1, 10, 10)
pages = list(p.iter_pages())
assert pages == [1]
assert not p.has_prev
assert not p.has_next
assert p.prev is None
assert p.next is None
def test_pagination_2():
p = Pagination(1, 10, 20)
l = list(p.iter_pages())
assert l == [1, 2]
assert not p.has_prev
assert p.has_next
assert p.prev is None
assert p.next == 2
