django/tests/db_functions/math/test_acos.py

55 lines
2.2 KiB
Python

import math
from decimal import Decimal
from django.db.models import DecimalField
from django.db.models.functions import ACos
from django.test import TestCase
from django.test.utils import register_lookup
from ..models import DecimalModel, FloatModel, IntegerModel
class ACosTests(TestCase):
def test_null(self):
IntegerModel.objects.create()
obj = IntegerModel.objects.annotate(null_acos=ACos('normal')).first()
self.assertIsNone(obj.null_acos)
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal('-0.9'), n2=Decimal('0.6'))
obj = DecimalModel.objects.annotate(n1_acos=ACos('n1'), n2_acos=ACos('n2')).first()
self.assertIsInstance(obj.n1_acos, Decimal)
self.assertIsInstance(obj.n2_acos, Decimal)
self.assertAlmostEqual(obj.n1_acos, Decimal(math.acos(obj.n1)))
self.assertAlmostEqual(obj.n2_acos, Decimal(math.acos(obj.n2)))
def test_float(self):
FloatModel.objects.create(f1=-0.5, f2=0.33)
obj = FloatModel.objects.annotate(f1_acos=ACos('f1'), f2_acos=ACos('f2')).first()
self.assertIsInstance(obj.f1_acos, float)
self.assertIsInstance(obj.f2_acos, float)
self.assertAlmostEqual(obj.f1_acos, math.acos(obj.f1))
self.assertAlmostEqual(obj.f2_acos, math.acos(obj.f2))
def test_integer(self):
IntegerModel.objects.create(small=0, normal=1, big=-1)
obj = IntegerModel.objects.annotate(
small_acos=ACos('small'),
normal_acos=ACos('normal'),
big_acos=ACos('big'),
).first()
self.assertIsInstance(obj.small_acos, float)
self.assertIsInstance(obj.normal_acos, float)
self.assertIsInstance(obj.big_acos, float)
self.assertAlmostEqual(obj.small_acos, math.acos(obj.small))
self.assertAlmostEqual(obj.normal_acos, math.acos(obj.normal))
self.assertAlmostEqual(obj.big_acos, math.acos(obj.big))
def test_transform(self):
with register_lookup(DecimalField, ACos):
DecimalModel.objects.create(n1=Decimal('0.5'), n2=Decimal('0'))
DecimalModel.objects.create(n1=Decimal('-0.9'), n2=Decimal('0'))
obj = DecimalModel.objects.filter(n1__acos__lt=2).get()
self.assertEqual(obj.n1, Decimal('0.5'))