55 lines
2.2 KiB
Python
55 lines
2.2 KiB
Python
import math
|
|
from decimal import Decimal
|
|
|
|
from django.db.models import DecimalField
|
|
from django.db.models.functions import Tan
|
|
from django.test import TestCase
|
|
from django.test.utils import register_lookup
|
|
|
|
from ..models import DecimalModel, FloatModel, IntegerModel
|
|
|
|
|
|
class TanTests(TestCase):
|
|
|
|
def test_null(self):
|
|
IntegerModel.objects.create()
|
|
obj = IntegerModel.objects.annotate(null_tan=Tan('normal')).first()
|
|
self.assertIsNone(obj.null_tan)
|
|
|
|
def test_decimal(self):
|
|
DecimalModel.objects.create(n1=Decimal('-12.9'), n2=Decimal('0.6'))
|
|
obj = DecimalModel.objects.annotate(n1_tan=Tan('n1'), n2_tan=Tan('n2')).first()
|
|
self.assertIsInstance(obj.n1_tan, Decimal)
|
|
self.assertIsInstance(obj.n2_tan, Decimal)
|
|
self.assertAlmostEqual(obj.n1_tan, Decimal(math.tan(obj.n1)))
|
|
self.assertAlmostEqual(obj.n2_tan, Decimal(math.tan(obj.n2)))
|
|
|
|
def test_float(self):
|
|
FloatModel.objects.create(f1=-27.5, f2=0.33)
|
|
obj = FloatModel.objects.annotate(f1_tan=Tan('f1'), f2_tan=Tan('f2')).first()
|
|
self.assertIsInstance(obj.f1_tan, float)
|
|
self.assertIsInstance(obj.f2_tan, float)
|
|
self.assertAlmostEqual(obj.f1_tan, math.tan(obj.f1))
|
|
self.assertAlmostEqual(obj.f2_tan, math.tan(obj.f2))
|
|
|
|
def test_integer(self):
|
|
IntegerModel.objects.create(small=-20, normal=15, big=-1)
|
|
obj = IntegerModel.objects.annotate(
|
|
small_tan=Tan('small'),
|
|
normal_tan=Tan('normal'),
|
|
big_tan=Tan('big'),
|
|
).first()
|
|
self.assertIsInstance(obj.small_tan, float)
|
|
self.assertIsInstance(obj.normal_tan, float)
|
|
self.assertIsInstance(obj.big_tan, float)
|
|
self.assertAlmostEqual(obj.small_tan, math.tan(obj.small))
|
|
self.assertAlmostEqual(obj.normal_tan, math.tan(obj.normal))
|
|
self.assertAlmostEqual(obj.big_tan, math.tan(obj.big))
|
|
|
|
def test_transform(self):
|
|
with register_lookup(DecimalField, Tan):
|
|
DecimalModel.objects.create(n1=Decimal('0.0'), n2=Decimal('0'))
|
|
DecimalModel.objects.create(n1=Decimal('12.0'), n2=Decimal('0'))
|
|
obj = DecimalModel.objects.filter(n1__tan__lt=0).get()
|
|
self.assertEqual(obj.n1, Decimal('12.0'))
|