def test_returns_first_several_pages(self):
self.assertEqual(
get_page_slice(
current_page=PAGES_VISIBLE_AT_BOUNDARY // 2,
num_pages=MAX_PAGES_WITHOUT_SHRINKING + 1,
),
slice(0, PAGES_VISIBLE_AT_BOUNDARY),
)
def test_returns_some_inner_pages(self):
current_page = MAX_PAGES_WITHOUT_SHRINKING
start_index = current_page - 1 - INNER_VISIBLE_PAGES // 2
self.assertEqual(
get_page_slice(
current_page=current_page,
num_pages=MAX_PAGES_WITHOUT_SHRINKING * 2,
),
slice(start_index, start_index + INNER_VISIBLE_PAGES),
)
def test_returns_inner_at_boundary_minus_one(self):
self.assertEqual(
get_page_slice(
current_page=5,
num_pages=10,
max_pages_without_shrinking=8,
pages_visible_at_boundary=5,
inner_visible_pages=3,
),
slice(3, 6),
)
def test_returns_last_several_pages(self):
num_pages = MAX_PAGES_WITHOUT_SHRINKING + 1
self.assertEqual(
get_page_slice(
current_page=num_pages - PAGES_VISIBLE_AT_BOUNDARY // 2,
num_pages=num_pages,
),
slice(
num_pages - PAGES_VISIBLE_AT_BOUNDARY,
num_pages,
),
)
def test_returns_all_pages_at_small_num_of_them(self):
num_pages = MAX_PAGES_WITHOUT_SHRINKING
self.assertEqual(
get_page_slice(current_page=3, num_pages=num_pages),
slice(0, num_pages),
)