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django/tests/db_functions/math/test_round.py
Nick Pope 7552de7866 Used more specific unittest assertions in tests.
* assertIsNone()/assertIsNotNone() instead of comparing to None.
* assertLess() for < comparisons.
* assertIs() for 'is' expressions.
* assertIsInstance() for isinstance() expressions.
* rounding of assertAlmostEqual() for round() expressions.
* assertIs(..., True/False) instead of comparing to True/False.
* assertIs()/assertIsNot() for ==/!= comparisons.
* assertNotEqual() for == comparisons.
* assertTrue()/assertFalse() instead of comparing to True/False.
2019-10-29 12:37:30 +01:00

54 lines
2.2 KiB
Python

from decimal import Decimal
from django.db.models import DecimalField
from django.db.models.functions import Round
from django.test import TestCase
from django.test.utils import register_lookup
from ..models import DecimalModel, FloatModel, IntegerModel
class RoundTests(TestCase):
def test_null(self):
IntegerModel.objects.create()
obj = IntegerModel.objects.annotate(null_round=Round('normal')).first()
self.assertIsNone(obj.null_round)
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal('-12.9'), n2=Decimal('0.6'))
obj = DecimalModel.objects.annotate(n1_round=Round('n1'), n2_round=Round('n2')).first()
self.assertIsInstance(obj.n1_round, Decimal)
self.assertIsInstance(obj.n2_round, Decimal)
self.assertAlmostEqual(obj.n1_round, obj.n1, places=0)
self.assertAlmostEqual(obj.n2_round, obj.n2, places=0)
def test_float(self):
FloatModel.objects.create(f1=-27.55, f2=0.55)
obj = FloatModel.objects.annotate(f1_round=Round('f1'), f2_round=Round('f2')).first()
self.assertIsInstance(obj.f1_round, float)
self.assertIsInstance(obj.f2_round, float)
self.assertAlmostEqual(obj.f1_round, obj.f1, places=0)
self.assertAlmostEqual(obj.f2_round, obj.f2, places=0)
def test_integer(self):
IntegerModel.objects.create(small=-20, normal=15, big=-1)
obj = IntegerModel.objects.annotate(
small_round=Round('small'),
normal_round=Round('normal'),
big_round=Round('big'),
).first()
self.assertIsInstance(obj.small_round, int)
self.assertIsInstance(obj.normal_round, int)
self.assertIsInstance(obj.big_round, int)
self.assertAlmostEqual(obj.small_round, obj.small, places=0)
self.assertAlmostEqual(obj.normal_round, obj.normal, places=0)
self.assertAlmostEqual(obj.big_round, obj.big, places=0)
def test_transform(self):
with register_lookup(DecimalField, Round):
DecimalModel.objects.create(n1=Decimal('2.0'), n2=Decimal('0'))
DecimalModel.objects.create(n1=Decimal('-1.0'), n2=Decimal('0'))
obj = DecimalModel.objects.filter(n1__round__gt=0).get()
self.assertEqual(obj.n1, Decimal('2.0'))