mirror of
https://github.com/django/django.git
synced 2024-12-23 17:46:27 +00:00
34d6bceec4
Co-authored-by: Srinivas Reddy Thatiparthy <thatiparthysreenivas@gmail.com> Co-authored-by: Nick Pope <nick.pope@flightdataservices.com>
45 lines
1.7 KiB
Python
45 lines
1.7 KiB
Python
from decimal import Decimal
|
|
|
|
from django.db.models.functions import Power
|
|
from django.test import TestCase
|
|
|
|
from ..models import DecimalModel, FloatModel, IntegerModel
|
|
|
|
|
|
class PowerTests(TestCase):
|
|
|
|
def test_null(self):
|
|
IntegerModel.objects.create(big=100)
|
|
obj = IntegerModel.objects.annotate(
|
|
null_power_small=Power('small', 'normal'),
|
|
null_power_normal=Power('normal', 'big'),
|
|
).first()
|
|
self.assertIsNone(obj.null_power_small)
|
|
self.assertIsNone(obj.null_power_normal)
|
|
|
|
def test_decimal(self):
|
|
DecimalModel.objects.create(n1=Decimal('1.0'), n2=Decimal('-0.6'))
|
|
obj = DecimalModel.objects.annotate(n_power=Power('n1', 'n2')).first()
|
|
self.assertIsInstance(obj.n_power, Decimal)
|
|
self.assertAlmostEqual(obj.n_power, Decimal(obj.n1 ** obj.n2))
|
|
|
|
def test_float(self):
|
|
FloatModel.objects.create(f1=2.3, f2=1.1)
|
|
obj = FloatModel.objects.annotate(f_power=Power('f1', 'f2')).first()
|
|
self.assertIsInstance(obj.f_power, float)
|
|
self.assertAlmostEqual(obj.f_power, obj.f1 ** obj.f2)
|
|
|
|
def test_integer(self):
|
|
IntegerModel.objects.create(small=-1, normal=20, big=3)
|
|
obj = IntegerModel.objects.annotate(
|
|
small_power=Power('small', 'normal'),
|
|
normal_power=Power('normal', 'big'),
|
|
big_power=Power('big', 'small'),
|
|
).first()
|
|
self.assertIsInstance(obj.small_power, float)
|
|
self.assertIsInstance(obj.normal_power, float)
|
|
self.assertIsInstance(obj.big_power, float)
|
|
self.assertAlmostEqual(obj.small_power, obj.small ** obj.normal)
|
|
self.assertAlmostEqual(obj.normal_power, obj.normal ** obj.big)
|
|
self.assertAlmostEqual(obj.big_power, obj.big ** obj.small)
|