| import math |
| from decimal import Decimal |
|
|
| from django.db.models.functions import ATan2 |
| from django.test import TestCase |
|
|
| from ..models import DecimalModel, FloatModel, IntegerModel |
|
|
|
|
| class ATan2Tests(TestCase): |
| def test_null(self): |
| IntegerModel.objects.create(big=100) |
| obj = IntegerModel.objects.annotate( |
| null_atan2_sn=ATan2("small", "normal"), |
| null_atan2_nb=ATan2("normal", "big"), |
| null_atan2_bn=ATan2("big", "normal"), |
| ).first() |
| self.assertIsNone(obj.null_atan2_sn) |
| self.assertIsNone(obj.null_atan2_nb) |
| self.assertIsNone(obj.null_atan2_bn) |
|
|
| def test_decimal(self): |
| DecimalModel.objects.create(n1=Decimal("-9.9"), n2=Decimal("4.6")) |
| obj = DecimalModel.objects.annotate(n_atan2=ATan2("n1", "n2")).first() |
| self.assertIsInstance(obj.n_atan2, Decimal) |
| self.assertAlmostEqual(obj.n_atan2, Decimal(math.atan2(obj.n1, obj.n2))) |
|
|
| def test_float(self): |
| FloatModel.objects.create(f1=-25, f2=0.33) |
| obj = FloatModel.objects.annotate(f_atan2=ATan2("f1", "f2")).first() |
| self.assertIsInstance(obj.f_atan2, float) |
| self.assertAlmostEqual(obj.f_atan2, math.atan2(obj.f1, obj.f2)) |
|
|
| def test_integer(self): |
| IntegerModel.objects.create(small=0, normal=1, big=10) |
| obj = IntegerModel.objects.annotate( |
| atan2_sn=ATan2("small", "normal"), |
| atan2_nb=ATan2("normal", "big"), |
| ).first() |
| self.assertIsInstance(obj.atan2_sn, float) |
| self.assertIsInstance(obj.atan2_nb, float) |
| self.assertAlmostEqual(obj.atan2_sn, math.atan2(obj.small, obj.normal)) |
| self.assertAlmostEqual(obj.atan2_nb, math.atan2(obj.normal, obj.big)) |
|
|
