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annotate babel/tests/numbers.py @ 580:ea413a4d754b trunk

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fix format_decimal() with small Decimal values (#214, patch from George Lund)
author fschwarz
date Fri, 03 Aug 2012 08:36:21 +0000
parents e77dd06c40ef
children 964cd2ec6f94
rev   line source
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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2007-2011 Edgewall Software
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4 # All rights reserved.
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5 #
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6 # This software is licensed as described in the file COPYING, which
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7 # you should have received as part of this distribution. The terms
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8 # are also available at http://babel.edgewall.org/wiki/License.
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9 #
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10 # This software consists of voluntary contributions made by many
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11 # individuals. For the exact contribution history, see the revision
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12 # history and logs, available at http://babel.edgewall.org/log/.
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13
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14 from decimal import Decimal
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15 import doctest
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16 import unittest
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17
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18 from babel import numbers
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19
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20
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21 class FormatDecimalTestCase(unittest.TestCase):
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22
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23 def test_patterns(self):
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24 self.assertEqual(numbers.format_decimal(12345, '##0',
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25 locale='en_US'), '12345')
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26 self.assertEqual(numbers.format_decimal(6.5, '0.00', locale='sv'),
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27 '6,50')
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28 self.assertEqual(numbers.format_decimal(10.0**20,
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29 '#.00', locale='en_US'),
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30 '100000000000000000000.00')
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31 # regression test for #183, fraction digits were not correctly cutted
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32 # if the input was a float value and the value had more than 7
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33 # significant digits
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34 self.assertEqual(u'12,345,678.05',
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35 numbers.format_decimal(12345678.051, '#,##0.00',
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36 locale='en_US'))
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37
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38 def test_subpatterns(self):
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39 self.assertEqual(numbers.format_decimal(-12345, '#,##0.##;-#',
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40 locale='en_US'), '-12,345')
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41 self.assertEqual(numbers.format_decimal(-12345, '#,##0.##;(#)',
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42 locale='en_US'), '(12,345)')
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43
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44 def test_default_rounding(self):
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45 """
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46 Testing Round-Half-Even (Banker's rounding)
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47
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48 A '5' is rounded to the closest 'even' number
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49 """
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50 self.assertEqual(numbers.format_decimal(5.5, '0', locale='sv'), '6')
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51 self.assertEqual(numbers.format_decimal(6.5, '0', locale='sv'), '6')
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52 self.assertEqual(numbers.format_decimal(6.5, '0', locale='sv'), '6')
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53 self.assertEqual(numbers.format_decimal(1.2325, locale='sv'), '1,232')
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54 self.assertEqual(numbers.format_decimal(1.2335, locale='sv'), '1,234')
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55
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56 def test_significant_digits(self):
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57 """Test significant digits patterns"""
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58 self.assertEqual(numbers.format_decimal(123004, '@@',locale='en_US'),
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59 '120000')
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60 self.assertEqual(numbers.format_decimal(1.12, '@', locale='sv'), '1')
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61 self.assertEqual(numbers.format_decimal(1.1, '@@', locale='sv'), '1,1')
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62 self.assertEqual(numbers.format_decimal(1.1, '@@@@@##', locale='sv'),
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63 '1,1000')
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64 self.assertEqual(numbers.format_decimal(0.0001, '@@@', locale='sv'),
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65 '0,000100')
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66 self.assertEqual(numbers.format_decimal(0.0001234, '@@@', locale='sv'),
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67 '0,000123')
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68 self.assertEqual(numbers.format_decimal(0.0001234, '@@@#',locale='sv'),
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69 '0,0001234')
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70 self.assertEqual(numbers.format_decimal(0.0001234, '@@@#',locale='sv'),
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71 '0,0001234')
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72 self.assertEqual(numbers.format_decimal(0.12345, '@@@',locale='sv'),
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73 '0,123')
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74 self.assertEqual(numbers.format_decimal(3.14159, '@@##',locale='sv'),
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75 '3,142')
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76 self.assertEqual(numbers.format_decimal(1.23004, '@@##',locale='sv'),
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77 '1,23')
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78 self.assertEqual(numbers.format_decimal(1230.04, '@@,@@',locale='en_US'),
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79 '12,30')
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80 self.assertEqual(numbers.format_decimal(123.41, '@@##',locale='en_US'),
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81 '123.4')
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82 self.assertEqual(numbers.format_decimal(1, '@@',locale='en_US'),
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83 '1.0')
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84 self.assertEqual(numbers.format_decimal(0, '@',locale='en_US'),
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85 '0')
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86 self.assertEqual(numbers.format_decimal(0.1, '@',locale='en_US'),
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87 '0.1')
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88 self.assertEqual(numbers.format_decimal(0.1, '@#',locale='en_US'),
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89 '0.1')
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90 self.assertEqual(numbers.format_decimal(0.1, '@@', locale='en_US'),
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91 '0.10')
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92
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93 def test_decimals(self):
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94 """Test significant digits patterns"""
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95 self.assertEqual(numbers.format_decimal(Decimal('1.2345'),
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96 '#.00', locale='en_US'),
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97 '1.23')
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98 self.assertEqual(numbers.format_decimal(Decimal('1.2345000'),
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99 '#.00', locale='en_US'),
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100 '1.23')
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101 self.assertEqual(numbers.format_decimal(Decimal('1.2345000'),
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102 '@@', locale='en_US'),
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103 '1.2')
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104 self.assertEqual(numbers.format_decimal(Decimal('12345678901234567890.12345'),
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105 '#.00', locale='en_US'),
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106 '12345678901234567890.12')
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107
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108 def test_scientific_notation(self):
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109 fmt = numbers.format_scientific(0.1, '#E0', locale='en_US')
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110 self.assertEqual(fmt, '1E-1')
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111 fmt = numbers.format_scientific(0.01, '#E0', locale='en_US')
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112 self.assertEqual(fmt, '1E-2')
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113 fmt = numbers.format_scientific(10, '#E0', locale='en_US')
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114 self.assertEqual(fmt, '1E1')
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115 fmt = numbers.format_scientific(1234, '0.###E0', locale='en_US')
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116 self.assertEqual(fmt, '1.234E3')
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117 fmt = numbers.format_scientific(1234, '0.#E0', locale='en_US')
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118 self.assertEqual(fmt, '1.2E3')
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119 # Exponent grouping
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120 fmt = numbers.format_scientific(12345, '##0.####E0', locale='en_US')
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121 self.assertEqual(fmt, '12.345E3')
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122 # Minimum number of int digits
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123 fmt = numbers.format_scientific(12345, '00.###E0', locale='en_US')
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124 self.assertEqual(fmt, '12.345E3')
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125 fmt = numbers.format_scientific(-12345.6, '00.###E0', locale='en_US')
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126 self.assertEqual(fmt, '-12.346E3')
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127 fmt = numbers.format_scientific(-0.01234, '00.###E0', locale='en_US')
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128 self.assertEqual(fmt, '-12.34E-3')
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129 # Custom pattern suffic
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130 fmt = numbers.format_scientific(123.45, '#.##E0 m/s', locale='en_US')
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131 self.assertEqual(fmt, '1.23E2 m/s')
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132 # Exponent patterns
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133 fmt = numbers.format_scientific(123.45, '#.##E00 m/s', locale='en_US')
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134 self.assertEqual(fmt, '1.23E02 m/s')
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135 fmt = numbers.format_scientific(0.012345, '#.##E00 m/s', locale='en_US')
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136 self.assertEqual(fmt, '1.23E-02 m/s')
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137 fmt = numbers.format_scientific(Decimal('12345'), '#.##E+00 m/s',
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138 locale='en_US')
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139 self.assertEqual(fmt, '1.23E+04 m/s')
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140 # 0 (see ticket #99)
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141 fmt = numbers.format_scientific(0, '#E0', locale='en_US')
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142 self.assertEqual(fmt, '0E0')
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143
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144 def test_formatting_of_very_small_decimals(self):
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145 # previously formatting very small decimals could lead to a type error
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146 # because the Decimal->string conversion was too simple (see #214)
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147 number = Decimal("7E-7")
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148 fmt = numbers.format_decimal(number, format="@@@", locale='en_US')
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149 self.assertEqual('0.000000700', fmt)
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150
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151
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152 class BankersRoundTestCase(unittest.TestCase):
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153 def test_round_to_nearest_integer(self):
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154 self.assertEqual(1, numbers.bankersround(Decimal('0.5001')))
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155
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156 def test_round_to_even_for_two_nearest_integers(self):
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157 self.assertEqual(0, numbers.bankersround(Decimal('0.5')))
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158 self.assertEqual(2, numbers.bankersround(Decimal('1.5')))
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fschwarz
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159 self.assertEqual(-2, numbers.bankersround(Decimal('-2.5')))
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fschwarz
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160
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fschwarz
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161 self.assertEqual(0, numbers.bankersround(Decimal('0.05'), ndigits=1))
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fschwarz
parents: 556
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162 self.assertEqual(Decimal('0.2'), numbers.bankersround(Decimal('0.15'), ndigits=1))
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fschwarz
parents: 556
diff changeset
163
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fschwarz
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164
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7870274479f5 Import of initial code base.
cmlenz
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165 def suite():
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cmlenz
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166 suite = unittest.TestSuite()
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167 suite.addTest(doctest.DocTestSuite(numbers))
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0896af2c49ec Added round-half-even (banker's rounding) support.
jonas
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168 suite.addTest(unittest.makeSuite(FormatDecimalTestCase))
557
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fschwarz
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169 suite.addTest(unittest.makeSuite(BankersRoundTestCase))
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cmlenz
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170 return suite
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171
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cmlenz
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172 if __name__ == '__main__':
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cmlenz
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173 unittest.main(defaultTest='suite')
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