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45 lines
1.7 KiB
Python
45 lines
1.7 KiB
Python
import math
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from decimal import Decimal
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from django.db.models.functions import Mod
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from django.test import TestCase
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from ..models import DecimalModel, FloatModel, IntegerModel
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class ModTests(TestCase):
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def test_null(self):
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IntegerModel.objects.create(big=100)
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obj = IntegerModel.objects.annotate(
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null_mod_small=Mod("small", "normal"),
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null_mod_normal=Mod("normal", "big"),
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).first()
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self.assertIsNone(obj.null_mod_small)
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self.assertIsNone(obj.null_mod_normal)
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def test_decimal(self):
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DecimalModel.objects.create(n1=Decimal("-9.9"), n2=Decimal("4.6"))
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obj = DecimalModel.objects.annotate(n_mod=Mod("n1", "n2")).first()
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self.assertIsInstance(obj.n_mod, Decimal)
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self.assertAlmostEqual(obj.n_mod, Decimal(math.fmod(obj.n1, obj.n2)))
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def test_float(self):
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FloatModel.objects.create(f1=-25, f2=0.33)
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obj = FloatModel.objects.annotate(f_mod=Mod("f1", "f2")).first()
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self.assertIsInstance(obj.f_mod, float)
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self.assertAlmostEqual(obj.f_mod, math.fmod(obj.f1, obj.f2))
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def test_integer(self):
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IntegerModel.objects.create(small=20, normal=15, big=1)
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obj = IntegerModel.objects.annotate(
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small_mod=Mod("small", "normal"),
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normal_mod=Mod("normal", "big"),
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big_mod=Mod("big", "small"),
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).first()
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self.assertIsInstance(obj.small_mod, float)
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self.assertIsInstance(obj.normal_mod, float)
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self.assertIsInstance(obj.big_mod, float)
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self.assertEqual(obj.small_mod, math.fmod(obj.small, obj.normal))
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self.assertEqual(obj.normal_mod, math.fmod(obj.normal, obj.big))
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self.assertEqual(obj.big_mod, math.fmod(obj.big, obj.small))
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