author | Nishanth Amuluru <nishanth@fossee.in> |
Sat, 08 Jan 2011 12:11:30 +0530 | |
changeset 70 | dca28aad6760 |
parent 69 | c6bca38c1cbf |
permissions | -rw-r--r-- |
69
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from unittest import TestCase |
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from django.core.paginator import Paginator, EmptyPage |
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class PaginatorTests(TestCase): |
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""" |
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Tests for the Paginator and Page classes. |
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""" |
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def check_paginator(self, params, output): |
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""" |
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Helper method that instantiates a Paginator object from the passed |
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params and then checks that its attributes match the passed output. |
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""" |
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count, num_pages, page_range = output |
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paginator = Paginator(*params) |
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self.check_attribute('count', paginator, count, params) |
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self.check_attribute('num_pages', paginator, num_pages, params) |
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self.check_attribute('page_range', paginator, page_range, params) |
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|
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def check_attribute(self, name, paginator, expected, params): |
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""" |
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Helper method that checks a single attribute and gives a nice error |
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message upon test failure. |
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""" |
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got = getattr(paginator, name) |
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self.assertEqual(expected, got, |
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"For '%s', expected %s but got %s. Paginator parameters were: %s" |
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% (name, expected, got, params)) |
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def test_paginator(self): |
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""" |
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Tests the paginator attributes using varying inputs. |
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""" |
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nine = [1, 2, 3, 4, 5, 6, 7, 8, 9] |
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ten = nine + [10] |
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eleven = ten + [11] |
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tests = ( |
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# Each item is two tuples: |
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# First tuple is Paginator parameters - object_list, per_page, |
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# orphans, and allow_empty_first_page. |
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# Second tuple is resulting Paginator attributes - count, |
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# num_pages, and page_range. |
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# Ten items, varying orphans, no empty first page. |
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((ten, 4, 0, False), (10, 3, [1, 2, 3])), |
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((ten, 4, 1, False), (10, 3, [1, 2, 3])), |
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((ten, 4, 2, False), (10, 2, [1, 2])), |
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((ten, 4, 5, False), (10, 2, [1, 2])), |
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((ten, 4, 6, False), (10, 1, [1])), |
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# Ten items, varying orphans, allow empty first page. |
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((ten, 4, 0, True), (10, 3, [1, 2, 3])), |
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((ten, 4, 1, True), (10, 3, [1, 2, 3])), |
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((ten, 4, 2, True), (10, 2, [1, 2])), |
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((ten, 4, 5, True), (10, 2, [1, 2])), |
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((ten, 4, 6, True), (10, 1, [1])), |
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# One item, varying orphans, no empty first page. |
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(([1], 4, 0, False), (1, 1, [1])), |
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(([1], 4, 1, False), (1, 1, [1])), |
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(([1], 4, 2, False), (1, 1, [1])), |
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# One item, varying orphans, allow empty first page. |
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(([1], 4, 0, True), (1, 1, [1])), |
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(([1], 4, 1, True), (1, 1, [1])), |
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(([1], 4, 2, True), (1, 1, [1])), |
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# Zero items, varying orphans, no empty first page. |
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(([], 4, 0, False), (0, 0, [])), |
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(([], 4, 1, False), (0, 0, [])), |
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(([], 4, 2, False), (0, 0, [])), |
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# Zero items, varying orphans, allow empty first page. |
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(([], 4, 0, True), (0, 1, [1])), |
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(([], 4, 1, True), (0, 1, [1])), |
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(([], 4, 2, True), (0, 1, [1])), |
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# Number if items one less than per_page. |
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(([], 1, 0, True), (0, 1, [1])), |
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(([], 1, 0, False), (0, 0, [])), |
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(([1], 2, 0, True), (1, 1, [1])), |
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((nine, 10, 0, True), (9, 1, [1])), |
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# Number if items equal to per_page. |
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(([1], 1, 0, True), (1, 1, [1])), |
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(([1, 2], 2, 0, True), (2, 1, [1])), |
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((ten, 10, 0, True), (10, 1, [1])), |
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# Number if items one more than per_page. |
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(([1, 2], 1, 0, True), (2, 2, [1, 2])), |
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(([1, 2, 3], 2, 0, True), (3, 2, [1, 2])), |
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((eleven, 10, 0, True), (11, 2, [1, 2])), |
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# Number if items one more than per_page with one orphan. |
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(([1, 2], 1, 1, True), (2, 1, [1])), |
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(([1, 2, 3], 2, 1, True), (3, 1, [1])), |
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((eleven, 10, 1, True), (11, 1, [1])), |
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) |
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for params, output in tests: |
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self.check_paginator(params, output) |
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|
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def check_indexes(self, params, page_num, indexes): |
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""" |
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Helper method that instantiates a Paginator object from the passed |
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params and then checks that the start and end indexes of the passed |
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page_num match those given as a 2-tuple in indexes. |
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""" |
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paginator = Paginator(*params) |
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if page_num == 'first': |
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page_num = 1 |
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102 |
elif page_num == 'last': |
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page_num = paginator.num_pages |
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page = paginator.page(page_num) |
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start, end = indexes |
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msg = ("For %s of page %s, expected %s but got %s." |
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" Paginator parameters were: %s") |
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self.assertEqual(start, page.start_index(), |
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msg % ('start index', page_num, start, page.start_index(), params)) |
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self.assertEqual(end, page.end_index(), |
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msg % ('end index', page_num, end, page.end_index(), params)) |
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112 |
|
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113 |
def test_page_indexes(self): |
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114 |
""" |
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115 |
Tests that paginator pages have the correct start and end indexes. |
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116 |
""" |
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ten = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] |
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118 |
tests = ( |
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# Each item is three tuples: |
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120 |
# First tuple is Paginator parameters - object_list, per_page, |
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121 |
# orphans, and allow_empty_first_page. |
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122 |
# Second tuple is the start and end indexes of the first page. |
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123 |
# Third tuple is the start and end indexes of the last page. |
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124 |
# Ten items, varying per_page, no orphans. |
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125 |
((ten, 1, 0, True), (1, 1), (10, 10)), |
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126 |
((ten, 2, 0, True), (1, 2), (9, 10)), |
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127 |
((ten, 3, 0, True), (1, 3), (10, 10)), |
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128 |
((ten, 5, 0, True), (1, 5), (6, 10)), |
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129 |
# Ten items, varying per_page, with orphans. |
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130 |
((ten, 1, 1, True), (1, 1), (9, 10)), |
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131 |
((ten, 1, 2, True), (1, 1), (8, 10)), |
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132 |
((ten, 3, 1, True), (1, 3), (7, 10)), |
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133 |
((ten, 3, 2, True), (1, 3), (7, 10)), |
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134 |
((ten, 3, 4, True), (1, 3), (4, 10)), |
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135 |
((ten, 5, 1, True), (1, 5), (6, 10)), |
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136 |
((ten, 5, 2, True), (1, 5), (6, 10)), |
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137 |
((ten, 5, 5, True), (1, 10), (1, 10)), |
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138 |
# One item, varying orphans, no empty first page. |
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139 |
(([1], 4, 0, False), (1, 1), (1, 1)), |
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140 |
(([1], 4, 1, False), (1, 1), (1, 1)), |
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141 |
(([1], 4, 2, False), (1, 1), (1, 1)), |
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142 |
# One item, varying orphans, allow empty first page. |
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143 |
(([1], 4, 0, True), (1, 1), (1, 1)), |
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144 |
(([1], 4, 1, True), (1, 1), (1, 1)), |
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145 |
(([1], 4, 2, True), (1, 1), (1, 1)), |
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146 |
# Zero items, varying orphans, allow empty first page. |
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147 |
(([], 4, 0, True), (0, 0), (0, 0)), |
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148 |
(([], 4, 1, True), (0, 0), (0, 0)), |
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149 |
(([], 4, 2, True), (0, 0), (0, 0)), |
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150 |
) |
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151 |
for params, first, last in tests: |
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152 |
self.check_indexes(params, 'first', first) |
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153 |
self.check_indexes(params, 'last', last) |
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154 |
# When no items and no empty first page, we should get EmptyPage error. |
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155 |
self.assertRaises(EmptyPage, self.check_indexes, ([], 4, 0, False), 1, None) |
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156 |
self.assertRaises(EmptyPage, self.check_indexes, ([], 4, 1, False), 1, None) |
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157 |
self.assertRaises(EmptyPage, self.check_indexes, ([], 4, 2, False), 1, None) |