diff -r 5ff1fc726848 -r c6bca38c1cbf parts/django/tests/regressiontests/pagination_regress/tests.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/parts/django/tests/regressiontests/pagination_regress/tests.py Sat Jan 08 11:20:57 2011 +0530 @@ -0,0 +1,157 @@ +from unittest import TestCase + +from django.core.paginator import Paginator, EmptyPage + +class PaginatorTests(TestCase): + """ + Tests for the Paginator and Page classes. + """ + + def check_paginator(self, params, output): + """ + Helper method that instantiates a Paginator object from the passed + params and then checks that its attributes match the passed output. + """ + count, num_pages, page_range = output + paginator = Paginator(*params) + self.check_attribute('count', paginator, count, params) + self.check_attribute('num_pages', paginator, num_pages, params) + self.check_attribute('page_range', paginator, page_range, params) + + def check_attribute(self, name, paginator, expected, params): + """ + Helper method that checks a single attribute and gives a nice error + message upon test failure. + """ + got = getattr(paginator, name) + self.assertEqual(expected, got, + "For '%s', expected %s but got %s. Paginator parameters were: %s" + % (name, expected, got, params)) + + def test_paginator(self): + """ + Tests the paginator attributes using varying inputs. + """ + nine = [1, 2, 3, 4, 5, 6, 7, 8, 9] + ten = nine + [10] + eleven = ten + [11] + tests = ( + # Each item is two tuples: + # First tuple is Paginator parameters - object_list, per_page, + # orphans, and allow_empty_first_page. + # Second tuple is resulting Paginator attributes - count, + # num_pages, and page_range. + # Ten items, varying orphans, no empty first page. + ((ten, 4, 0, False), (10, 3, [1, 2, 3])), + ((ten, 4, 1, False), (10, 3, [1, 2, 3])), + ((ten, 4, 2, False), (10, 2, [1, 2])), + ((ten, 4, 5, False), (10, 2, [1, 2])), + ((ten, 4, 6, False), (10, 1, [1])), + # Ten items, varying orphans, allow empty first page. + ((ten, 4, 0, True), (10, 3, [1, 2, 3])), + ((ten, 4, 1, True), (10, 3, [1, 2, 3])), + ((ten, 4, 2, True), (10, 2, [1, 2])), + ((ten, 4, 5, True), (10, 2, [1, 2])), + ((ten, 4, 6, True), (10, 1, [1])), + # One item, varying orphans, no empty first page. + (([1], 4, 0, False), (1, 1, [1])), + (([1], 4, 1, False), (1, 1, [1])), + (([1], 4, 2, False), (1, 1, [1])), + # One item, varying orphans, allow empty first page. + (([1], 4, 0, True), (1, 1, [1])), + (([1], 4, 1, True), (1, 1, [1])), + (([1], 4, 2, True), (1, 1, [1])), + # Zero items, varying orphans, no empty first page. + (([], 4, 0, False), (0, 0, [])), + (([], 4, 1, False), (0, 0, [])), + (([], 4, 2, False), (0, 0, [])), + # Zero items, varying orphans, allow empty first page. + (([], 4, 0, True), (0, 1, [1])), + (([], 4, 1, True), (0, 1, [1])), + (([], 4, 2, True), (0, 1, [1])), + # Number if items one less than per_page. + (([], 1, 0, True), (0, 1, [1])), + (([], 1, 0, False), (0, 0, [])), + (([1], 2, 0, True), (1, 1, [1])), + ((nine, 10, 0, True), (9, 1, [1])), + # Number if items equal to per_page. + (([1], 1, 0, True), (1, 1, [1])), + (([1, 2], 2, 0, True), (2, 1, [1])), + ((ten, 10, 0, True), (10, 1, [1])), + # Number if items one more than per_page. + (([1, 2], 1, 0, True), (2, 2, [1, 2])), + (([1, 2, 3], 2, 0, True), (3, 2, [1, 2])), + ((eleven, 10, 0, True), (11, 2, [1, 2])), + # Number if items one more than per_page with one orphan. + (([1, 2], 1, 1, True), (2, 1, [1])), + (([1, 2, 3], 2, 1, True), (3, 1, [1])), + ((eleven, 10, 1, True), (11, 1, [1])), + ) + for params, output in tests: + self.check_paginator(params, output) + + 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_page_indexes(self): + """ + Tests that paginator pages have the correct start and end indexes. + """ + ten = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] + tests = ( + # Each item is three tuples: + # First tuple is Paginator parameters - object_list, per_page, + # orphans, and allow_empty_first_page. + # Second tuple is the start and end indexes of the first page. + # Third tuple is the start and end indexes of the last page. + # Ten items, varying per_page, no orphans. + ((ten, 1, 0, True), (1, 1), (10, 10)), + ((ten, 2, 0, True), (1, 2), (9, 10)), + ((ten, 3, 0, True), (1, 3), (10, 10)), + ((ten, 5, 0, True), (1, 5), (6, 10)), + # Ten items, varying per_page, with orphans. + ((ten, 1, 1, True), (1, 1), (9, 10)), + ((ten, 1, 2, True), (1, 1), (8, 10)), + ((ten, 3, 1, True), (1, 3), (7, 10)), + ((ten, 3, 2, True), (1, 3), (7, 10)), + ((ten, 3, 4, True), (1, 3), (4, 10)), + ((ten, 5, 1, True), (1, 5), (6, 10)), + ((ten, 5, 2, True), (1, 5), (6, 10)), + ((ten, 5, 5, True), (1, 10), (1, 10)), + # One item, varying orphans, no empty first page. + (([1], 4, 0, False), (1, 1), (1, 1)), + (([1], 4, 1, False), (1, 1), (1, 1)), + (([1], 4, 2, False), (1, 1), (1, 1)), + # One item, varying orphans, allow empty first page. + (([1], 4, 0, True), (1, 1), (1, 1)), + (([1], 4, 1, True), (1, 1), (1, 1)), + (([1], 4, 2, True), (1, 1), (1, 1)), + # Zero items, varying orphans, allow empty first page. + (([], 4, 0, True), (0, 0), (0, 0)), + (([], 4, 1, True), (0, 0), (0, 0)), + (([], 4, 2, True), (0, 0), (0, 0)), + ) + for params, first, last in tests: + self.check_indexes(params, 'first', first) + self.check_indexes(params, 'last', last) + # When no items and no empty first page, we should get EmptyPage error. + self.assertRaises(EmptyPage, self.check_indexes, ([], 4, 0, False), 1, None) + self.assertRaises(EmptyPage, self.check_indexes, ([], 4, 1, False), 1, None) + self.assertRaises(EmptyPage, self.check_indexes, ([], 4, 2, False), 1, None)