389 lines
16 KiB
Python
389 lines
16 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 __future__ import unicode_literals
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import datetime
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from django.db import connection
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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 .models import Number, Experiment
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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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ordered=False
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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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ordered=False
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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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ordered=False
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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').bitand(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').bitor(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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class FTimeDeltaTests(TestCase):
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def setUp(self):
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sday = datetime.date(2010, 6, 25)
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stime = datetime.datetime(2010, 6, 25, 12, 15, 30, 747000)
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midnight = datetime.time(0)
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delta0 = datetime.timedelta(0)
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delta1 = datetime.timedelta(microseconds=253000)
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delta2 = datetime.timedelta(seconds=44)
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delta3 = datetime.timedelta(hours=21, minutes=8)
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delta4 = datetime.timedelta(days=10)
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# Test data is set so that deltas and delays will be
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# strictly increasing.
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self.deltas = []
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self.delays = []
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self.days_long = []
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# e0: started same day as assigned, zero duration
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end = stime+delta0
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e0 = Experiment.objects.create(name='e0', assigned=sday, start=stime,
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end=end, completed=end.date())
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self.deltas.append(delta0)
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self.delays.append(e0.start-
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datetime.datetime.combine(e0.assigned, midnight))
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self.days_long.append(e0.completed-e0.assigned)
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# e1: started one day after assigned, tiny duration, data
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# set so that end time has no fractional seconds, which
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# tests an edge case on sqlite. This Experiment is only
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# included in the test data when the DB supports microsecond
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# precision.
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if connection.features.supports_microsecond_precision:
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delay = datetime.timedelta(1)
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end = stime + delay + delta1
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e1 = Experiment.objects.create(name='e1', assigned=sday,
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start=stime+delay, end=end, completed=end.date())
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self.deltas.append(delta1)
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self.delays.append(e1.start-
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datetime.datetime.combine(e1.assigned, midnight))
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self.days_long.append(e1.completed-e1.assigned)
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# e2: started three days after assigned, small duration
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end = stime+delta2
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e2 = Experiment.objects.create(name='e2',
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assigned=sday-datetime.timedelta(3), start=stime, end=end,
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completed=end.date())
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self.deltas.append(delta2)
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self.delays.append(e2.start-
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datetime.datetime.combine(e2.assigned, midnight))
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self.days_long.append(e2.completed-e2.assigned)
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# e3: started four days after assigned, medium duration
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delay = datetime.timedelta(4)
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end = stime + delay + delta3
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e3 = Experiment.objects.create(name='e3',
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assigned=sday, start=stime+delay, end=end, completed=end.date())
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self.deltas.append(delta3)
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self.delays.append(e3.start-
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datetime.datetime.combine(e3.assigned, midnight))
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self.days_long.append(e3.completed-e3.assigned)
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# e4: started 10 days after assignment, long duration
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end = stime + delta4
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e4 = Experiment.objects.create(name='e4',
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assigned=sday-datetime.timedelta(10), start=stime, end=end,
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completed=end.date())
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self.deltas.append(delta4)
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self.delays.append(e4.start-
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datetime.datetime.combine(e4.assigned, midnight))
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self.days_long.append(e4.completed-e4.assigned)
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self.expnames = [e.name for e in Experiment.objects.all()]
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def test_delta_add(self):
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for i in range(len(self.deltas)):
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delta = self.deltas[i]
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test_set = [e.name for e in
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Experiment.objects.filter(end__lt=F('start')+delta)]
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self.assertEqual(test_set, self.expnames[:i])
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test_set = [e.name for e in
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Experiment.objects.filter(end__lte=F('start')+delta)]
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self.assertEqual(test_set, self.expnames[:i+1])
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def test_delta_subtract(self):
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for i in range(len(self.deltas)):
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delta = self.deltas[i]
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test_set = [e.name for e in
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Experiment.objects.filter(start__gt=F('end')-delta)]
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self.assertEqual(test_set, self.expnames[:i])
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test_set = [e.name for e in
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Experiment.objects.filter(start__gte=F('end')-delta)]
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self.assertEqual(test_set, self.expnames[:i+1])
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def test_exclude(self):
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for i in range(len(self.deltas)):
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delta = self.deltas[i]
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test_set = [e.name for e in
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Experiment.objects.exclude(end__lt=F('start')+delta)]
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self.assertEqual(test_set, self.expnames[i:])
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test_set = [e.name for e in
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Experiment.objects.exclude(end__lte=F('start')+delta)]
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self.assertEqual(test_set, self.expnames[i+1:])
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def test_date_comparison(self):
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for i in range(len(self.days_long)):
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days = self.days_long[i]
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test_set = [e.name for e in
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Experiment.objects.filter(completed__lt=F('assigned')+days)]
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self.assertEqual(test_set, self.expnames[:i])
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test_set = [e.name for e in
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Experiment.objects.filter(completed__lte=F('assigned')+days)]
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self.assertEqual(test_set, self.expnames[:i+1])
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@skipUnlessDBFeature("supports_mixed_date_datetime_comparisons")
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def test_mixed_comparisons1(self):
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for i in range(len(self.delays)):
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delay = self.delays[i]
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if not connection.features.supports_microsecond_precision:
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delay = datetime.timedelta(delay.days, delay.seconds)
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test_set = [e.name for e in
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Experiment.objects.filter(assigned__gt=F('start')-delay)]
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self.assertEqual(test_set, self.expnames[:i])
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test_set = [e.name for e in
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Experiment.objects.filter(assigned__gte=F('start')-delay)]
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self.assertEqual(test_set, self.expnames[:i+1])
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def test_mixed_comparisons2(self):
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delays = [datetime.timedelta(delay.days) for delay in self.delays]
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for i in range(len(delays)):
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delay = delays[i]
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test_set = [e.name for e in
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Experiment.objects.filter(start__lt=F('assigned')+delay)]
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self.assertEqual(test_set, self.expnames[:i])
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test_set = [e.name for e in
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Experiment.objects.filter(start__lte=F('assigned')+delay+
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datetime.timedelta(1))]
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self.assertEqual(test_set, self.expnames[:i+1])
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def test_delta_update(self):
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for i in range(len(self.deltas)):
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delta = self.deltas[i]
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exps = Experiment.objects.all()
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expected_durations = [e.duration() for e in exps]
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expected_starts = [e.start+delta for e in exps]
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expected_ends = [e.end+delta for e in exps]
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Experiment.objects.update(start=F('start')+delta, end=F('end')+delta)
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exps = Experiment.objects.all()
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new_starts = [e.start for e in exps]
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new_ends = [e.end for e in exps]
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new_durations = [e.duration() for e in exps]
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self.assertEqual(expected_starts, new_starts)
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self.assertEqual(expected_ends, new_ends)
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self.assertEqual(expected_durations, new_durations)
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def test_delta_invalid_op_mult(self):
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raised = False
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try:
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r = repr(Experiment.objects.filter(end__lt=F('start')*self.deltas[0]))
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except TypeError:
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raised = True
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self.assertTrue(raised, "TypeError not raised on attempt to multiply datetime by timedelta.")
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def test_delta_invalid_op_div(self):
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raised = False
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try:
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r = repr(Experiment.objects.filter(end__lt=F('start')/self.deltas[0]))
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except TypeError:
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raised = True
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self.assertTrue(raised, "TypeError not raised on attempt to divide datetime by timedelta.")
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def test_delta_invalid_op_mod(self):
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raised = False
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try:
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r = repr(Experiment.objects.filter(end__lt=F('start')%self.deltas[0]))
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except TypeError:
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raised = True
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self.assertTrue(raised, "TypeError not raised on attempt to modulo divide datetime by timedelta.")
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def test_delta_invalid_op_and(self):
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raised = False
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try:
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r = repr(Experiment.objects.filter(end__lt=F('start').bitand(self.deltas[0])))
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except TypeError:
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raised = True
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self.assertTrue(raised, "TypeError not raised on attempt to binary and a datetime with a timedelta.")
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def test_delta_invalid_op_or(self):
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raised = False
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try:
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r = repr(Experiment.objects.filter(end__lt=F('start').bitor(self.deltas[0])))
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except TypeError:
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raised = True
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self.assertTrue(raised, "TypeError not raised on attempt to binary or a datetime with a timedelta.")
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