| from decimal import Decimal |
|
|
| from django.db.models import DecimalField |
| from django.db.models.functions import Abs |
| from django.test import TestCase |
| from django.test.utils import register_lookup |
|
|
| from ..models import DecimalModel, FloatModel, IntegerModel |
|
|
|
|
| class AbsTests(TestCase): |
| def test_null(self): |
| IntegerModel.objects.create() |
| obj = IntegerModel.objects.annotate(null_abs=Abs("normal")).first() |
| self.assertIsNone(obj.null_abs) |
|
|
| def test_decimal(self): |
| DecimalModel.objects.create(n1=Decimal("-0.8"), n2=Decimal("1.2")) |
| obj = DecimalModel.objects.annotate(n1_abs=Abs("n1"), n2_abs=Abs("n2")).first() |
| self.assertIsInstance(obj.n1_abs, Decimal) |
| self.assertIsInstance(obj.n2_abs, Decimal) |
| self.assertEqual(obj.n1, -obj.n1_abs) |
| self.assertEqual(obj.n2, obj.n2_abs) |
|
|
| def test_float(self): |
| obj = FloatModel.objects.create(f1=-0.5, f2=12) |
| obj = FloatModel.objects.annotate(f1_abs=Abs("f1"), f2_abs=Abs("f2")).first() |
| self.assertIsInstance(obj.f1_abs, float) |
| self.assertIsInstance(obj.f2_abs, float) |
| self.assertEqual(obj.f1, -obj.f1_abs) |
| self.assertEqual(obj.f2, obj.f2_abs) |
|
|
| def test_integer(self): |
| IntegerModel.objects.create(small=12, normal=0, big=-45) |
| obj = IntegerModel.objects.annotate( |
| small_abs=Abs("small"), |
| normal_abs=Abs("normal"), |
| big_abs=Abs("big"), |
| ).first() |
| self.assertIsInstance(obj.small_abs, int) |
| self.assertIsInstance(obj.normal_abs, int) |
| self.assertIsInstance(obj.big_abs, int) |
| self.assertEqual(obj.small, obj.small_abs) |
| self.assertEqual(obj.normal, obj.normal_abs) |
| self.assertEqual(obj.big, -obj.big_abs) |
|
|
| def test_transform(self): |
| with register_lookup(DecimalField, Abs): |
| DecimalModel.objects.create(n1=Decimal("-1.5"), n2=Decimal("0")) |
| DecimalModel.objects.create(n1=Decimal("-0.5"), n2=Decimal("0")) |
| obj = DecimalModel.objects.filter(n1__abs__gt=1).get() |
| self.assertEqual(obj.n1, Decimal("-1.5")) |
|
|
