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