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