Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

386 lines (319 sloc) 15.966 kb
"""
Spanning tests for all the operations that F() expressions can perform.
"""
from __future__ import absolute_import
import datetime
from django.db import connection
from django.db.models import F
from django.test import TestCase, Approximate, skipUnlessDBFeature
from .models import Number, Experiment
class ExpressionsRegressTests(TestCase):
def setUp(self):
Number(integer=-1).save()
Number(integer=42).save()
Number(integer=1337).save()
self.assertEqual(Number.objects.update(float=F('integer')), 3)
def test_fill_with_value_from_same_object(self):
"""
We can fill a value in all objects with an other value of the
same object.
"""
self.assertQuerysetEqual(
Number.objects.all(),
[
'<Number: -1, -1.000>',
'<Number: 42, 42.000>',
'<Number: 1337, 1337.000>'
]
)
def test_increment_value(self):
"""
We can increment a value of all objects in a query set.
"""
self.assertEqual(
Number.objects.filter(integer__gt=0)
.update(integer=F('integer') + 1),
2)
self.assertQuerysetEqual(
Number.objects.all(),
[
'<Number: -1, -1.000>',
'<Number: 43, 42.000>',
'<Number: 1338, 1337.000>'
]
)
def test_filter_not_equals_other_field(self):
"""
We can filter for objects, where a value is not equals the value
of an other field.
"""
self.assertEqual(
Number.objects.filter(integer__gt=0)
.update(integer=F('integer') + 1),
2)
self.assertQuerysetEqual(
Number.objects.exclude(float=F('integer')),
[
'<Number: 43, 42.000>',
'<Number: 1338, 1337.000>'
]
)
def test_complex_expressions(self):
"""
Complex expressions of different connection types are possible.
"""
n = Number.objects.create(integer=10, float=123.45)
self.assertEqual(Number.objects.filter(pk=n.pk)
.update(float=F('integer') + F('float') * 2),
1)
self.assertEqual(Number.objects.get(pk=n.pk).integer, 10)
self.assertEqual(Number.objects.get(pk=n.pk).float, Approximate(256.900, places=3))
class ExpressionOperatorTests(TestCase):
def setUp(self):
self.n = Number.objects.create(integer=42, float=15.5)
def test_lefthand_addition(self):
# LH Addition of floats and integers
Number.objects.filter(pk=self.n.pk).update(
integer=F('integer') + 15,
float=F('float') + 42.7
)
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 57)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(58.200, places=3))
def test_lefthand_subtraction(self):
# LH Subtraction of floats and integers
Number.objects.filter(pk=self.n.pk).update(integer=F('integer') - 15,
float=F('float') - 42.7)
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 27)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(-27.200, places=3))
def test_lefthand_multiplication(self):
# Multiplication of floats and integers
Number.objects.filter(pk=self.n.pk).update(integer=F('integer') * 15,
float=F('float') * 42.7)
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 630)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(661.850, places=3))
def test_lefthand_division(self):
# LH Division of floats and integers
Number.objects.filter(pk=self.n.pk).update(integer=F('integer') / 2,
float=F('float') / 42.7)
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 21)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(0.363, places=3))
def test_lefthand_modulo(self):
# LH Modulo arithmetic on integers
Number.objects.filter(pk=self.n.pk).update(integer=F('integer') % 20)
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 2)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
def test_lefthand_bitwise_and(self):
# LH Bitwise ands on integers
Number.objects.filter(pk=self.n.pk).update(integer=F('integer').bitand(56))
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 40)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
@skipUnlessDBFeature('supports_bitwise_or')
def test_lefthand_bitwise_or(self):
# LH Bitwise or on integers
Number.objects.filter(pk=self.n.pk).update(integer=F('integer').bitor(48))
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 58)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
def test_right_hand_addition(self):
# Right hand operators
Number.objects.filter(pk=self.n.pk).update(integer=15 + F('integer'),
float=42.7 + F('float'))
# RH Addition of floats and integers
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 57)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(58.200, places=3))
def test_right_hand_subtraction(self):
Number.objects.filter(pk=self.n.pk).update(integer=15 - F('integer'),
float=42.7 - F('float'))
# RH Subtraction of floats and integers
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, -27)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(27.200, places=3))
def test_right_hand_multiplication(self):
# RH Multiplication of floats and integers
Number.objects.filter(pk=self.n.pk).update(integer=15 * F('integer'),
float=42.7 * F('float'))
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 630)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(661.850, places=3))
def test_right_hand_division(self):
# RH Division of floats and integers
Number.objects.filter(pk=self.n.pk).update(integer=640 / F('integer'),
float=42.7 / F('float'))
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 15)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(2.755, places=3))
def test_right_hand_modulo(self):
# RH Modulo arithmetic on integers
Number.objects.filter(pk=self.n.pk).update(integer=69 % F('integer'))
self.assertEqual(Number.objects.get(pk=self.n.pk).integer, 27)
self.assertEqual(Number.objects.get(pk=self.n.pk).float, Approximate(15.500, places=3))
class FTimeDeltaTests(TestCase):
def setUp(self):
sday = datetime.date(2010, 6, 25)
stime = datetime.datetime(2010, 6, 25, 12, 15, 30, 747000)
midnight = datetime.time(0)
delta0 = datetime.timedelta(0)
delta1 = datetime.timedelta(microseconds=253000)
delta2 = datetime.timedelta(seconds=44)
delta3 = datetime.timedelta(hours=21, minutes=8)
delta4 = datetime.timedelta(days=10)
# Test data is set so that deltas and delays will be
# strictly increasing.
self.deltas = []
self.delays = []
self.days_long = []
# e0: started same day as assigned, zero duration
end = stime+delta0
e0 = Experiment.objects.create(name='e0', assigned=sday, start=stime,
end=end, completed=end.date())
self.deltas.append(delta0)
self.delays.append(e0.start-
datetime.datetime.combine(e0.assigned, midnight))
self.days_long.append(e0.completed-e0.assigned)
# e1: started one day after assigned, tiny duration, data
# set so that end time has no fractional seconds, which
# tests an edge case on sqlite. This Experiment is only
# included in the test data when the DB supports microsecond
# precision.
if connection.features.supports_microsecond_precision:
delay = datetime.timedelta(1)
end = stime + delay + delta1
e1 = Experiment.objects.create(name='e1', assigned=sday,
start=stime+delay, end=end, completed=end.date())
self.deltas.append(delta1)
self.delays.append(e1.start-
datetime.datetime.combine(e1.assigned, midnight))
self.days_long.append(e1.completed-e1.assigned)
# e2: started three days after assigned, small duration
end = stime+delta2
e2 = Experiment.objects.create(name='e2',
assigned=sday-datetime.timedelta(3), start=stime, end=end,
completed=end.date())
self.deltas.append(delta2)
self.delays.append(e2.start-
datetime.datetime.combine(e2.assigned, midnight))
self.days_long.append(e2.completed-e2.assigned)
# e3: started four days after assigned, medium duration
delay = datetime.timedelta(4)
end = stime + delay + delta3
e3 = Experiment.objects.create(name='e3',
assigned=sday, start=stime+delay, end=end, completed=end.date())
self.deltas.append(delta3)
self.delays.append(e3.start-
datetime.datetime.combine(e3.assigned, midnight))
self.days_long.append(e3.completed-e3.assigned)
# e4: started 10 days after assignment, long duration
end = stime + delta4
e4 = Experiment.objects.create(name='e4',
assigned=sday-datetime.timedelta(10), start=stime, end=end,
completed=end.date())
self.deltas.append(delta4)
self.delays.append(e4.start-
datetime.datetime.combine(e4.assigned, midnight))
self.days_long.append(e4.completed-e4.assigned)
self.expnames = [e.name for e in Experiment.objects.all()]
def test_delta_add(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
test_set = [e.name for e in
Experiment.objects.filter(end__lt=F('start')+delta)]
self.assertEqual(test_set, self.expnames[:i])
test_set = [e.name for e in
Experiment.objects.filter(end__lte=F('start')+delta)]
self.assertEqual(test_set, self.expnames[:i+1])
def test_delta_subtract(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
test_set = [e.name for e in
Experiment.objects.filter(start__gt=F('end')-delta)]
self.assertEqual(test_set, self.expnames[:i])
test_set = [e.name for e in
Experiment.objects.filter(start__gte=F('end')-delta)]
self.assertEqual(test_set, self.expnames[:i+1])
def test_exclude(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
test_set = [e.name for e in
Experiment.objects.exclude(end__lt=F('start')+delta)]
self.assertEqual(test_set, self.expnames[i:])
test_set = [e.name for e in
Experiment.objects.exclude(end__lte=F('start')+delta)]
self.assertEqual(test_set, self.expnames[i+1:])
def test_date_comparison(self):
for i in range(len(self.days_long)):
days = self.days_long[i]
test_set = [e.name for e in
Experiment.objects.filter(completed__lt=F('assigned')+days)]
self.assertEqual(test_set, self.expnames[:i])
test_set = [e.name for e in
Experiment.objects.filter(completed__lte=F('assigned')+days)]
self.assertEqual(test_set, self.expnames[:i+1])
@skipUnlessDBFeature("supports_mixed_date_datetime_comparisons")
def test_mixed_comparisons1(self):
for i in range(len(self.delays)):
delay = self.delays[i]
if not connection.features.supports_microsecond_precision:
delay = datetime.timedelta(delay.days, delay.seconds)
test_set = [e.name for e in
Experiment.objects.filter(assigned__gt=F('start')-delay)]
self.assertEqual(test_set, self.expnames[:i])
test_set = [e.name for e in
Experiment.objects.filter(assigned__gte=F('start')-delay)]
self.assertEqual(test_set, self.expnames[:i+1])
def test_mixed_comparisons2(self):
delays = [datetime.timedelta(delay.days) for delay in self.delays]
for i in range(len(delays)):
delay = delays[i]
test_set = [e.name for e in
Experiment.objects.filter(start__lt=F('assigned')+delay)]
self.assertEqual(test_set, self.expnames[:i])
test_set = [e.name for e in
Experiment.objects.filter(start__lte=F('assigned')+delay+
datetime.timedelta(1))]
self.assertEqual(test_set, self.expnames[:i+1])
def test_delta_update(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
exps = Experiment.objects.all()
expected_durations = [e.duration() for e in exps]
expected_starts = [e.start+delta for e in exps]
expected_ends = [e.end+delta for e in exps]
Experiment.objects.update(start=F('start')+delta, end=F('end')+delta)
exps = Experiment.objects.all()
new_starts = [e.start for e in exps]
new_ends = [e.end for e in exps]
new_durations = [e.duration() for e in exps]
self.assertEqual(expected_starts, new_starts)
self.assertEqual(expected_ends, new_ends)
self.assertEqual(expected_durations, new_durations)
def test_delta_invalid_op_mult(self):
raised = False
try:
r = repr(Experiment.objects.filter(end__lt=F('start')*self.deltas[0]))
except TypeError:
raised = True
self.assertTrue(raised, "TypeError not raised on attempt to multiply datetime by timedelta.")
def test_delta_invalid_op_div(self):
raised = False
try:
r = repr(Experiment.objects.filter(end__lt=F('start')/self.deltas[0]))
except TypeError:
raised = True
self.assertTrue(raised, "TypeError not raised on attempt to divide datetime by timedelta.")
def test_delta_invalid_op_mod(self):
raised = False
try:
r = repr(Experiment.objects.filter(end__lt=F('start')%self.deltas[0]))
except TypeError:
raised = True
self.assertTrue(raised, "TypeError not raised on attempt to modulo divide datetime by timedelta.")
def test_delta_invalid_op_and(self):
raised = False
try:
r = repr(Experiment.objects.filter(end__lt=F('start').bitand(self.deltas[0])))
except TypeError:
raised = True
self.assertTrue(raised, "TypeError not raised on attempt to binary and a datetime with a timedelta.")
def test_delta_invalid_op_or(self):
raised = False
try:
r = repr(Experiment.objects.filter(end__lt=F('start').bitor(self.deltas[0])))
except TypeError:
raised = True
self.assertTrue(raised, "TypeError not raised on attempt to binary or a datetime with a timedelta.")
Jump to Line
Something went wrong with that request. Please try again.