54 lines
2.1 KiB
Python
54 lines
2.1 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 Abs
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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 AbsTests(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_abs=Abs('normal')).first()
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self.assertIsNone(obj.null_abs)
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def test_decimal(self):
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DecimalModel.objects.create(n1=Decimal('-0.8'), n2=Decimal('1.2'))
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obj = DecimalModel.objects.annotate(n1_abs=Abs('n1'), n2_abs=Abs('n2')).first()
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self.assertIsInstance(obj.n1_abs, Decimal)
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self.assertIsInstance(obj.n2_abs, Decimal)
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self.assertEqual(obj.n1, -obj.n1_abs)
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self.assertEqual(obj.n2, obj.n2_abs)
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def test_float(self):
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obj = FloatModel.objects.create(f1=-0.5, f2=12)
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obj = FloatModel.objects.annotate(f1_abs=Abs('f1'), f2_abs=Abs('f2')).first()
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self.assertIsInstance(obj.f1_abs, float)
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self.assertIsInstance(obj.f2_abs, float)
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self.assertEqual(obj.f1, -obj.f1_abs)
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self.assertEqual(obj.f2, obj.f2_abs)
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def test_integer(self):
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IntegerModel.objects.create(small=12, normal=0, big=-45)
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obj = IntegerModel.objects.annotate(
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small_abs=Abs('small'),
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normal_abs=Abs('normal'),
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big_abs=Abs('big'),
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).first()
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self.assertIsInstance(obj.small_abs, int)
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self.assertIsInstance(obj.normal_abs, int)
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self.assertIsInstance(obj.big_abs, int)
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self.assertEqual(obj.small, obj.small_abs)
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self.assertEqual(obj.normal, obj.normal_abs)
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self.assertEqual(obj.big, -obj.big_abs)
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def test_transform(self):
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with register_lookup(DecimalField, Abs):
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DecimalModel.objects.create(n1=Decimal('-1.5'), n2=Decimal('0'))
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DecimalModel.objects.create(n1=Decimal('-0.5'), n2=Decimal('0'))
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objs = DecimalModel.objects.filter(n1__abs__gt=1)
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self.assertQuerysetEqual(objs, [Decimal('-1.5')], lambda a: a.n1)
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