mirror of
https://github.com/django/django.git
synced 2024-12-01 15:42:04 +01:00
84 lines
3.4 KiB
Python
84 lines
3.4 KiB
Python
import unittest
|
|
from decimal import Decimal
|
|
|
|
from django.core import validators
|
|
from django.core.exceptions import ValidationError
|
|
from django.db import connection, models
|
|
from django.test import TestCase
|
|
|
|
from .models import BigD, Foo
|
|
|
|
|
|
class DecimalFieldTests(TestCase):
|
|
|
|
def test_to_python(self):
|
|
f = models.DecimalField(max_digits=4, decimal_places=2)
|
|
self.assertEqual(f.to_python(3), Decimal('3'))
|
|
self.assertEqual(f.to_python('3.14'), Decimal('3.14'))
|
|
# to_python() converts floats and honors max_digits.
|
|
self.assertEqual(f.to_python(3.1415926535897), Decimal('3.142'))
|
|
self.assertEqual(f.to_python(2.4), Decimal('2.400'))
|
|
# Uses default rounding of ROUND_HALF_EVEN.
|
|
self.assertEqual(f.to_python(2.0625), Decimal('2.062'))
|
|
self.assertEqual(f.to_python(2.1875), Decimal('2.188'))
|
|
msg = "'abc' value must be a decimal number."
|
|
with self.assertRaisesMessage(ValidationError, msg):
|
|
f.to_python('abc')
|
|
|
|
def test_default(self):
|
|
f = models.DecimalField(default=Decimal('0.00'))
|
|
self.assertEqual(f.get_default(), Decimal('0.00'))
|
|
|
|
def test_get_prep_value(self):
|
|
f = models.DecimalField(max_digits=5, decimal_places=1)
|
|
self.assertIsNone(f.get_prep_value(None))
|
|
self.assertEqual(f.get_prep_value('2.4'), Decimal('2.4'))
|
|
|
|
def test_filter_with_strings(self):
|
|
"""
|
|
Should be able to filter decimal fields using strings (#8023).
|
|
"""
|
|
foo = Foo.objects.create(a='abc', d=Decimal('12.34'))
|
|
self.assertEqual(list(Foo.objects.filter(d='12.34')), [foo])
|
|
|
|
def test_save_without_float_conversion(self):
|
|
"""
|
|
Ensure decimals don't go through a corrupting float conversion during
|
|
save (#5079).
|
|
"""
|
|
bd = BigD(d='12.9')
|
|
bd.save()
|
|
bd = BigD.objects.get(pk=bd.pk)
|
|
self.assertEqual(bd.d, Decimal('12.9'))
|
|
|
|
@unittest.skipIf(connection.vendor == 'sqlite', 'SQLite stores values rounded to 15 significant digits.')
|
|
def test_fetch_from_db_without_float_rounding(self):
|
|
big_decimal = BigD.objects.create(d=Decimal('.100000000000000000000000000005'))
|
|
big_decimal.refresh_from_db()
|
|
self.assertEqual(big_decimal.d, Decimal('.100000000000000000000000000005'))
|
|
|
|
def test_lookup_really_big_value(self):
|
|
"""
|
|
Really big values can be used in a filter statement.
|
|
"""
|
|
# This should not crash.
|
|
Foo.objects.filter(d__gte=100000000000)
|
|
|
|
def test_max_digits_validation(self):
|
|
field = models.DecimalField(max_digits=2)
|
|
expected_message = validators.DecimalValidator.messages['max_digits'] % {'max': 2}
|
|
with self.assertRaisesMessage(ValidationError, expected_message):
|
|
field.clean(100, None)
|
|
|
|
def test_max_decimal_places_validation(self):
|
|
field = models.DecimalField(decimal_places=1)
|
|
expected_message = validators.DecimalValidator.messages['max_decimal_places'] % {'max': 1}
|
|
with self.assertRaisesMessage(ValidationError, expected_message):
|
|
field.clean(Decimal('0.99'), None)
|
|
|
|
def test_max_whole_digits_validation(self):
|
|
field = models.DecimalField(max_digits=3, decimal_places=1)
|
|
expected_message = validators.DecimalValidator.messages['max_whole_digits'] % {'max': 2}
|
|
with self.assertRaisesMessage(ValidationError, expected_message):
|
|
field.clean(Decimal('999'), None)
|