| 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")) |
|
|
