def test_page_has_previous(self):
paginator = Paginator(10, 2)
page = paginator.page(1)
self.assertFalse(page.has_previous())
page = paginator.page(5)
self.assertTrue(page.has_previous())
def check_indexes(self, params, page_num, indexes):
"""
Helper method that instantiates a Paginator object from the passed
params and then checks that the start and end indexes of the passed
page_num match those given as a 2-tuple in indexes.
"""
paginator = Paginator(*params)
if page_num == 'first':
page_num = 1
elif page_num == 'last':
page_num = paginator.num_pages
page = paginator.page(page_num)
start, end = indexes
msg = ("For %s of page %s, expected %s but got %s."
" Paginator parameters were: %s")
self.assertEqual(start, page.start_index(),
msg % ('start index', page_num, start, page.start_index(), params))
self.assertEqual(end, page.end_index(),
msg % ('end index', page_num, end, page.end_index(), params))
def test_paginator_validate_number(self):
paginator = Paginator(10, 2)
# Make sure invalid pages throw the appropriate errors
self.assertRaises(PageNotAnInteger, paginator.validate_number, "wtf")
self.assertRaises(EmptyPage, paginator.validate_number, 0)
self.assertRaises(EmptyPage, paginator.validate_number, 100)
# Make sure validate_number throws EmptyPage when
# allow_empty_first_page is false and there are no items
paginator = Paginator(0, 2, allow_empty_first_page=False)
self.assertRaises(EmptyPage, paginator.validate_number, 1)
# Can't seem to find the conditions for paginator that cause
# line 30 to happen, so I'm forcing it.
paginator = Paginator(0, 2, allow_empty_first_page=False)
num_pages = paginator.num_pages # Pre-calculate the num-pages
self.assertEqual(num_pages, 0)
paginator.allow_empty_first_page = True
paginator.validate_number(1)
def test_next_page_number(self):
paginator = Paginator(10, 2)
page = paginator.page(1)
self.assertEqual(page.next_page_number(), 2)
def test_previous_page_number(self):
paginator = Paginator(10, 2)
page = paginator.page(5)
self.assertEqual(page.previous_page_number(), 4)
def test_page_repr(self):
paginator = Paginator(10, 2)
page = paginator.page(1)
result = page.__repr__()
self.assertEqual("<Page 1 of 5>", result)