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54 lines
2.1 KiB
Python
54 lines
2.1 KiB
Python
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from decimal import Decimal
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from django.db.models import DecimalField
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from django.db.models.functions import Sign
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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 SignTests(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_sign=Sign('normal')).first()
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self.assertIsNone(obj.null_sign)
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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_sign=Sign('n1'), n2_sign=Sign('n2')).first()
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self.assertIsInstance(obj.n1_sign, Decimal)
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self.assertIsInstance(obj.n2_sign, Decimal)
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self.assertEqual(obj.n1_sign, Decimal('-1'))
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self.assertEqual(obj.n2_sign, Decimal('1'))
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def test_float(self):
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FloatModel.objects.create(f1=-27.5, f2=0.33)
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obj = FloatModel.objects.annotate(f1_sign=Sign('f1'), f2_sign=Sign('f2')).first()
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self.assertIsInstance(obj.f1_sign, float)
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self.assertIsInstance(obj.f2_sign, float)
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self.assertEqual(obj.f1_sign, -1.0)
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self.assertEqual(obj.f2_sign, 1.0)
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def test_integer(self):
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IntegerModel.objects.create(small=-20, normal=0, big=20)
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obj = IntegerModel.objects.annotate(
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small_sign=Sign('small'),
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normal_sign=Sign('normal'),
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big_sign=Sign('big'),
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).first()
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self.assertIsInstance(obj.small_sign, int)
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self.assertIsInstance(obj.normal_sign, int)
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self.assertIsInstance(obj.big_sign, int)
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self.assertEqual(obj.small_sign, -1)
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self.assertEqual(obj.normal_sign, 0)
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self.assertEqual(obj.big_sign, 1)
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def test_transform(self):
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with register_lookup(DecimalField, Sign):
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DecimalModel.objects.create(n1=Decimal('5.4'), n2=Decimal('0'))
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DecimalModel.objects.create(n1=Decimal('-0.1'), n2=Decimal('0'))
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obj = DecimalModel.objects.filter(n1__sign__lt=0, n2__sign=0).get()
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self.assertEqual(obj.n1, Decimal('-0.1'))
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