1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
import math
from decimal import Decimal
from django.db.models import DecimalField
from django.db.models.functions import Sqrt
from django.test import TestCase
from django.test.utils import register_lookup
from ..models import DecimalModel, FloatModel, IntegerModel
class SqrtTests(TestCase):
def test_null(self):
IntegerModel.objects.create()
obj = IntegerModel.objects.annotate(null_sqrt=Sqrt('normal')).first()
self.assertIsNone(obj.null_sqrt)
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal('12.9'), n2=Decimal('0.6'))
obj = DecimalModel.objects.annotate(n1_sqrt=Sqrt('n1'), n2_sqrt=Sqrt('n2')).first()
self.assertIsInstance(obj.n1_sqrt, Decimal)
self.assertIsInstance(obj.n2_sqrt, Decimal)
self.assertAlmostEqual(obj.n1_sqrt, Decimal(math.sqrt(obj.n1)))
self.assertAlmostEqual(obj.n2_sqrt, Decimal(math.sqrt(obj.n2)))
def test_float(self):
FloatModel.objects.create(f1=27.5, f2=0.33)
obj = FloatModel.objects.annotate(f1_sqrt=Sqrt('f1'), f2_sqrt=Sqrt('f2')).first()
self.assertIsInstance(obj.f1_sqrt, float)
self.assertIsInstance(obj.f2_sqrt, float)
self.assertAlmostEqual(obj.f1_sqrt, math.sqrt(obj.f1))
self.assertAlmostEqual(obj.f2_sqrt, math.sqrt(obj.f2))
def test_integer(self):
IntegerModel.objects.create(small=20, normal=15, big=1)
obj = IntegerModel.objects.annotate(
small_sqrt=Sqrt('small'),
normal_sqrt=Sqrt('normal'),
big_sqrt=Sqrt('big'),
).first()
self.assertIsInstance(obj.small_sqrt, float)
self.assertIsInstance(obj.normal_sqrt, float)
self.assertIsInstance(obj.big_sqrt, float)
self.assertAlmostEqual(obj.small_sqrt, math.sqrt(obj.small))
self.assertAlmostEqual(obj.normal_sqrt, math.sqrt(obj.normal))
self.assertAlmostEqual(obj.big_sqrt, math.sqrt(obj.big))
def test_transform(self):
with register_lookup(DecimalField, Sqrt):
DecimalModel.objects.create(n1=Decimal('6.0'), n2=Decimal('0'))
DecimalModel.objects.create(n1=Decimal('1.0'), n2=Decimal('0'))
obj = DecimalModel.objects.filter(n1__sqrt__gt=2).get()
self.assertEqual(obj.n1, Decimal('6.0'))
|
