| import math |
| from decimal import Decimal |
|
|
| from django.db.models import DecimalField |
| from django.db.models.functions import Sqrt |
| from django.test import TestCase |
| from django.test.utils import register_lookup |
|
|
| from ..models import DecimalModel, FloatModel, IntegerModel |
|
|
|
|
| class SqrtTests(TestCase): |
| def test_null(self): |
| IntegerModel.objects.create() |
| obj = IntegerModel.objects.annotate(null_sqrt=Sqrt("normal")).first() |
| self.assertIsNone(obj.null_sqrt) |
|
|
| def test_decimal(self): |
| DecimalModel.objects.create(n1=Decimal("12.9"), n2=Decimal("0.6")) |
| obj = DecimalModel.objects.annotate( |
| n1_sqrt=Sqrt("n1"), n2_sqrt=Sqrt("n2") |
| ).first() |
| self.assertIsInstance(obj.n1_sqrt, Decimal) |
| self.assertIsInstance(obj.n2_sqrt, Decimal) |
| self.assertAlmostEqual(obj.n1_sqrt, Decimal(math.sqrt(obj.n1))) |
| self.assertAlmostEqual(obj.n2_sqrt, Decimal(math.sqrt(obj.n2))) |
|
|
| def test_float(self): |
| FloatModel.objects.create(f1=27.5, f2=0.33) |
| obj = FloatModel.objects.annotate( |
| f1_sqrt=Sqrt("f1"), f2_sqrt=Sqrt("f2") |
| ).first() |
| self.assertIsInstance(obj.f1_sqrt, float) |
| self.assertIsInstance(obj.f2_sqrt, float) |
| self.assertAlmostEqual(obj.f1_sqrt, math.sqrt(obj.f1)) |
| self.assertAlmostEqual(obj.f2_sqrt, math.sqrt(obj.f2)) |
|
|
| def test_integer(self): |
| IntegerModel.objects.create(small=20, normal=15, big=1) |
| obj = IntegerModel.objects.annotate( |
| small_sqrt=Sqrt("small"), |
| normal_sqrt=Sqrt("normal"), |
| big_sqrt=Sqrt("big"), |
| ).first() |
| self.assertIsInstance(obj.small_sqrt, float) |
| self.assertIsInstance(obj.normal_sqrt, float) |
| self.assertIsInstance(obj.big_sqrt, float) |
| self.assertAlmostEqual(obj.small_sqrt, math.sqrt(obj.small)) |
| self.assertAlmostEqual(obj.normal_sqrt, math.sqrt(obj.normal)) |
| self.assertAlmostEqual(obj.big_sqrt, math.sqrt(obj.big)) |
|
|
| def test_transform(self): |
| with register_lookup(DecimalField, Sqrt): |
| DecimalModel.objects.create(n1=Decimal("6.0"), n2=Decimal("0")) |
| DecimalModel.objects.create(n1=Decimal("1.0"), n2=Decimal("0")) |
| obj = DecimalModel.objects.filter(n1__sqrt__gt=2).get() |
| self.assertEqual(obj.n1, Decimal("6.0")) |
|
|
