196 lines
7.8 KiB
Python
196 lines
7.8 KiB
Python
"""
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Spanning tests for all the operations that F() expressions can perform.
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"""
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from django.conf import settings
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from django.db import models, DEFAULT_DB_ALIAS
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from django.db.models import F
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from django.test import TestCase, Approximate, skipUnlessDBFeature
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from regressiontests.expressions_regress.models import Number
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class ExpressionsRegressTests(TestCase):
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def setUp(self):
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Number(integer=-1).save()
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Number(integer=42).save()
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Number(integer=1337).save()
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self.assertEqual(Number.objects.update(float=F('integer')), 3)
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def test_fill_with_value_from_same_object(self):
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"""
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We can fill a value in all objects with an other value of the
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same object.
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"""
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self.assertQuerysetEqual(
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Number.objects.all(),
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[
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'<Number: -1, -1.000>',
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'<Number: 42, 42.000>',
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'<Number: 1337, 1337.000>'
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]
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)
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def test_increment_value(self):
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"""
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We can increment a value of all objects in a query set.
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"""
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self.assertEqual(
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Number.objects.filter(integer__gt=0)
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.update(integer=F('integer') + 1),
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2)
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self.assertQuerysetEqual(
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Number.objects.all(),
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[
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'<Number: -1, -1.000>',
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'<Number: 43, 42.000>',
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'<Number: 1338, 1337.000>'
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]
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)
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def test_filter_not_equals_other_field(self):
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"""
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We can filter for objects, where a value is not equals the value
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of an other field.
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"""
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self.assertEqual(
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Number.objects.filter(integer__gt=0)
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.update(integer=F('integer') + 1),
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2)
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self.assertQuerysetEqual(
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Number.objects.exclude(float=F('integer')),
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[
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'<Number: 43, 42.000>',
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'<Number: 1338, 1337.000>'
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]
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)
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def test_complex_expressions(self):
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"""
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Complex expressions of different connection types are possible.
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"""
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n = Number.objects.create(integer=10, float=123.45)
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self.assertEqual(Number.objects.filter(pk=n.pk)
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.update(float=F('integer') + F('float') * 2),
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1)
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self.assertEqual(Number.objects.get(pk=n.pk).integer, 10)
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self.assertEqual(Number.objects.get(pk=n.pk).float, Approximate(256.900, places=3))
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class ExpressionOperatorTests(TestCase):
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def setUp(self):
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self.n = Number.objects.create(integer=42, float=15.5)
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def test_lefthand_addition(self):
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# LH Addition of floats and integers
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Number.objects.filter(pk=self.n.pk).update(
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integer=F('integer') + 15,
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float=F('float') + 42.7
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)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 57)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(58.200, places=3))
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def test_lefthand_subtraction(self):
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# LH Subtraction of floats and integers
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Number.objects.filter(pk=self.n.pk).update(integer=F('integer') - 15,
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float=F('float') - 42.7)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 27)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(-27.200, places=3))
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def test_lefthand_multiplication(self):
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# Multiplication of floats and integers
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Number.objects.filter(pk=self.n.pk).update(integer=F('integer') * 15,
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float=F('float') * 42.7)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 630)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(661.850, places=3))
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def test_lefthand_division(self):
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# LH Division of floats and integers
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Number.objects.filter(pk=self.n.pk).update(integer=F('integer') / 2,
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float=F('float') / 42.7)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 21)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(0.363, places=3))
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def test_lefthand_modulo(self):
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# LH Modulo arithmetic on integers
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Number.objects.filter(pk=self.n.pk).update(integer=F('integer') % 20)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 2)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
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def test_lefthand_bitwise_and(self):
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# LH Bitwise ands on integers
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Number.objects.filter(pk=self.n.pk).update(integer=F('integer') & 56)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 40)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
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@skipUnlessDBFeature('supports_bitwise_or')
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def test_lefthand_bitwise_or(self):
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# LH Bitwise or on integers
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Number.objects.filter(pk=self.n.pk).update(integer=F('integer') | 48)
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 58)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
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def test_right_hand_addition(self):
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# Right hand operators
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Number.objects.filter(pk=self.n.pk).update(integer=15 + F('integer'),
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float=42.7 + F('float'))
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# RH Addition of floats and integers
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 57)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(58.200, places=3))
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def test_right_hand_subtraction(self):
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Number.objects.filter(pk=self.n.pk).update(integer=15 - F('integer'),
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float=42.7 - F('float'))
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# RH Subtraction of floats and integers
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, -27)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(27.200, places=3))
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def test_right_hand_multiplication(self):
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# RH Multiplication of floats and integers
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Number.objects.filter(pk=self.n.pk).update(integer=15 * F('integer'),
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float=42.7 * F('float'))
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 630)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(661.850, places=3))
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def test_right_hand_division(self):
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# RH Division of floats and integers
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Number.objects.filter(pk=self.n.pk).update(integer=640 / F('integer'),
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float=42.7 / F('float'))
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 15)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(2.755, places=3))
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def test_right_hand_modulo(self):
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# RH Modulo arithmetic on integers
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Number.objects.filter(pk=self.n.pk).update(integer=69 % F('integer'))
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 27)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
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def test_right_hand_bitwise_and(self):
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# RH Bitwise ands on integers
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Number.objects.filter(pk=self.n.pk).update(integer=15 & F('integer'))
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 10)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
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@skipUnlessDBFeature('supports_bitwise_or')
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def test_right_hand_bitwise_or(self):
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# RH Bitwise or on integers
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Number.objects.filter(pk=self.n.pk).update(integer=15 | F('integer'))
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self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 47)
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self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
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