django/tests/utils_tests/test_numberformat.py

from decimal import Decimal
from sys import float_info
from unittest import TestCase

from django.utils.numberformat import format as nformat


class TestNumberFormat(TestCase):

    def test_format_number(self):
        self.assertEqual(nformat(1234, '.'), '1234')
        self.assertEqual(nformat(1234.2, '.'), '1234.2')
        self.assertEqual(nformat(1234, '.', decimal_pos=2), '1234.00')
        self.assertEqual(nformat(1234, '.', grouping=2, thousand_sep=','),
                         '1234')
        self.assertEqual(nformat(1234, '.', grouping=2, thousand_sep=',',
                                 force_grouping=True), '12,34')
        self.assertEqual(nformat(-1234.33, '.', decimal_pos=1), '-1234.3')

    def test_format_string(self):
        self.assertEqual(nformat('1234', '.'), '1234')
        self.assertEqual(nformat('1234.2', '.'), '1234.2')
        self.assertEqual(nformat('1234', '.', decimal_pos=2), '1234.00')
        self.assertEqual(nformat('1234', '.', grouping=2, thousand_sep=','),
                         '1234')
        self.assertEqual(nformat('1234', '.', grouping=2, thousand_sep=',',
                                 force_grouping=True), '12,34')
        self.assertEqual(nformat('-1234.33', '.', decimal_pos=1), '-1234.3')

    def test_large_number(self):
        most_max = ('{}179769313486231570814527423731704356798070567525844996'
                    '598917476803157260780028538760589558632766878171540458953'
                    '514382464234321326889464182768467546703537516986049910576'
                    '551282076245490090389328944075868508455133942304583236903'
                    '222948165808559332123348274797826204144723168738177180919'
                    '29988125040402618412485836{}')
        most_max2 = ('{}35953862697246314162905484746340871359614113505168999'
                     '31978349536063145215600570775211791172655337563430809179'
                     '07028764928468642653778928365536935093407075033972099821'
                     '15310256415249098018077865788815173701691026788460916647'
                     '38064458963316171186642466965495956524082894463374763543'
                     '61838599762500808052368249716736')
        int_max = int(float_info.max)
        self.assertEqual(nformat(int_max, '.'), most_max.format('', '8'))
        self.assertEqual(nformat(int_max + 1, '.'), most_max.format('', '9'))
        self.assertEqual(nformat(int_max * 2, '.'), most_max2.format(''))
        self.assertEqual(nformat(0 - int_max, '.'), most_max.format('-', '8'))
        self.assertEqual(nformat(-1 - int_max, '.'), most_max.format('-', '9'))
        self.assertEqual(nformat(-2 * int_max, '.'), most_max2.format('-'))

    def test_decimal_numbers(self):
        self.assertEqual(nformat(Decimal('1234'), '.'), '1234')
        self.assertEqual(nformat(Decimal('1234.2'), '.'), '1234.2')
        self.assertEqual(nformat(Decimal('1234'), '.', decimal_pos=2), '1234.00')
        self.assertEqual(nformat(Decimal('1234'), '.', grouping=2, thousand_sep=','), '1234')
        self.assertEqual(nformat(Decimal('1234'), '.', grouping=2, thousand_sep=',', force_grouping=True), '12,34')
        self.assertEqual(nformat(Decimal('-1234.33'), '.', decimal_pos=1), '-1234.3')
        self.assertEqual(nformat(Decimal('0.00000001'), '.', decimal_pos=8), '0.00000001')