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Simplified expressions.tests.

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Mariusz Felisiak 2018-09-13 22:12:21 +02:00 committed by GitHub
parent 1b1f64ee5a
commit e7a0a5c8b2
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1 changed files with 41 additions and 104 deletions
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145
tests/expressions/tests.py
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@ -65,11 +65,8 @@ class BasicExpressionsTests(TestCase):
foo=RawSQL('%s', ['value']),
).filter(foo='value').order_by('name')
self.assertQuerysetEqual(
companies, [
'<Company: Example Inc.>',
'<Company: Foobar Ltd.>',
'<Company: Test GmbH>',
],
companies,
['<Company: Example Inc.>', '<Company: Foobar Ltd.>', '<Company: Test GmbH>'],
)
@unittest.skipIf(connection.vendor == 'oracle', "Oracle doesn't support using boolean type in SELECT")
@ -150,9 +147,7 @@ class BasicExpressionsTests(TestCase):
def test_order_of_operations(self):
# Law of order of operations is followed
self. company_query.update(
num_chairs=F('num_employees') + 2 * F('num_employees')
)
self.company_query.update(num_chairs=F('num_employees') + 2 * F('num_employees'))
self.assertSequenceEqual(
self.company_query, [
{
@ -175,9 +170,7 @@ class BasicExpressionsTests(TestCase):
def test_parenthesis_priority(self):
# Law of order of operations can be overridden by parentheses
self.company_query.update(
num_chairs=((F('num_employees') + 2) * F('num_employees'))
)
self.company_query.update(num_chairs=(F('num_employees') + 2) * F('num_employees'))
self.assertSequenceEqual(
self.company_query, [
{
@ -200,16 +193,10 @@ class BasicExpressionsTests(TestCase):
def test_update_with_fk(self):
# ForeignKey can become updated with the value of another ForeignKey.
self.assertEqual(
Company.objects.update(point_of_contact=F('ceo')),
3
)
self.assertEqual(Company.objects.update(point_of_contact=F('ceo')), 3)
self.assertQuerysetEqual(
Company.objects.all(), [
"Joe Smith",
"Frank Meyer",
"Max Mustermann",
],
Company.objects.all(),
['Joe Smith', 'Frank Meyer', 'Max Mustermann'],
lambda c: str(c.point_of_contact),
ordered=False
)
@ -219,10 +206,8 @@ class BasicExpressionsTests(TestCase):
Number.objects.create(integer=2)
Number.objects.filter(float__isnull=False).update(float=Value(None))
self.assertQuerysetEqual(
Number.objects.all(), [
None,
None,
],
Number.objects.all(),
[None, None],
lambda n: n.float,
ordered=False
)
@ -230,15 +215,13 @@ class BasicExpressionsTests(TestCase):
def test_filter_with_join(self):
# F Expressions can also span joins
Company.objects.update(point_of_contact=F('ceo'))
c = Company.objects.all()[0]
c = Company.objects.first()
c.point_of_contact = Employee.objects.create(firstname="Guido", lastname="van Rossum")
c.save()
self.assertQuerysetEqual(
Company.objects.filter(ceo__firstname=F("point_of_contact__firstname")), [
"Foobar Ltd.",
"Test GmbH",
],
Company.objects.filter(ceo__firstname=F('point_of_contact__firstname')),
['Foobar Ltd.', 'Test GmbH'],
lambda c: c.name,
ordered=False
)
@ -262,28 +245,20 @@ class BasicExpressionsTests(TestCase):
def test_object_update(self):
# F expressions can be used to update attributes on single objects
test_gmbh = Company.objects.get(name="Test GmbH")
self.assertEqual(test_gmbh.num_employees, 32)
test_gmbh.num_employees = F("num_employees") + 4
test_gmbh.save()
test_gmbh = Company.objects.get(pk=test_gmbh.pk)
self.assertEqual(test_gmbh.num_employees, 36)
self.gmbh.num_employees = F('num_employees') + 4
self.gmbh.save()
self.gmbh.refresh_from_db()
self.assertEqual(self.gmbh.num_employees, 36)
def test_new_object_save(self):
# We should be able to use Funcs when inserting new data
test_co = Company(
name=Lower(Value("UPPER")), num_employees=32, num_chairs=1,
ceo=Employee.objects.create(firstname="Just", lastname="Doit", salary=30),
)
test_co = Company(name=Lower(Value('UPPER')), num_employees=32, num_chairs=1, ceo=self.max)
test_co.save()
test_co.refresh_from_db()
self.assertEqual(test_co.name, "upper")
def test_new_object_create(self):
test_co = Company.objects.create(
name=Lower(Value("UPPER")), num_employees=32, num_chairs=1,
ceo=Employee.objects.create(firstname="Just", lastname="Doit", salary=30),
)
test_co = Company.objects.create(name=Lower(Value('UPPER')), num_employees=32, num_chairs=1, ceo=self.max)
test_co.refresh_from_db()
self.assertEqual(test_co.name, "upper")
@ -298,29 +273,23 @@ class BasicExpressionsTests(TestCase):
def test_object_update_fk(self):
# F expressions cannot be used to update attributes which are foreign
# keys, or attributes which involve joins.
test_gmbh = Company.objects.get(name="Test GmbH")
def test():
test_gmbh.point_of_contact = F("ceo")
self.gmbh.point_of_contact = F('ceo')
msg = 'F(ceo)": "Company.point_of_contact" must be a "Employee" instance.'
with self.assertRaisesMessage(ValueError, msg):
test()
test_gmbh.point_of_contact = test_gmbh.ceo
test_gmbh.save()
test_gmbh.name = F("ceo__last_name")
self.gmbh.point_of_contact = self.gmbh.ceo
self.gmbh.save()
self.gmbh.name = F('ceo__last_name')
msg = 'Joined field references are not permitted in this query'
with self.assertRaisesMessage(FieldError, msg):
test_gmbh.save()
self.gmbh.save()
def test_object_update_unsaved_objects(self):
# F expressions cannot be used to update attributes on objects which do
# not yet exist in the database
test_gmbh = Company.objects.get(name="Test GmbH")
acme = Company(
name="The Acme Widget Co.", num_employees=12, num_chairs=5,
ceo=test_gmbh.ceo
)
acme = Company(name='The Acme Widget Co.', num_employees=12, num_chairs=5, ceo=self.max)
acme.num_employees = F("num_employees") + 16
msg = (
'Failed to insert expression "Col(expressions_company, '
@ -363,8 +332,7 @@ class BasicExpressionsTests(TestCase):
# Reverse multijoin F() references and the lookup target the same join.
# Pre #18375 the F() join was generated first and the lookup couldn't
# reuse that join.
qs = Employee.objects.filter(
company_ceo_set__num_chairs=F('company_ceo_set__num_employees'))
qs = Employee.objects.filter(company_ceo_set__num_chairs=F('company_ceo_set__num_employees'))
self.assertEqual(str(qs.query).count('JOIN'), 1)
def test_ticket_18375_kwarg_ordering(self):
@ -426,7 +394,7 @@ class BasicExpressionsTests(TestCase):
def test_subquery(self):
Company.objects.filter(name='Example Inc.').update(
point_of_contact=Employee.objects.get(firstname='Joe', lastname='Smith'),
ceo=Employee.objects.get(firstname='Max', lastname='Mustermann'),
ceo=self.max,
)
Employee.objects.create(firstname='Bob', lastname='Brown', salary=40)
qs = Employee.objects.annotate(
@ -810,13 +778,11 @@ class ExpressionsTests(TestCase):
["<Employee: %Joh\\nny %Joh\\n>", "<Employee: Jean-Claude Claude>", "<Employee: Johnny John>"],
ordered=False,
)
self.assertQuerysetEqual(
Employee.objects.filter(firstname__startswith=F('lastname')),
["<Employee: %Joh\\nny %Joh\\n>", "<Employee: Johnny John>"],
ordered=False,
)
self.assertQuerysetEqual(
Employee.objects.filter(firstname__endswith=F('lastname')),
["<Employee: Jean-Claude Claude>"],
@ -845,13 +811,11 @@ class ExpressionsTests(TestCase):
["<Employee: %Joh\\nny %joh\\n>", "<Employee: Jean-Claude claude>", "<Employee: Johnny john>"],
ordered=False,
)
self.assertQuerysetEqual(
Employee.objects.filter(firstname__istartswith=F('lastname')),
["<Employee: %Joh\\nny %joh\\n>", "<Employee: Johnny john>"],
ordered=False,
)
self.assertQuerysetEqual(
Employee.objects.filter(firstname__iendswith=F('lastname')),
["<Employee: Jean-Claude claude>"],
@ -874,11 +838,7 @@ class ExpressionsNumericTests(TestCase):
"""
self.assertQuerysetEqual(
Number.objects.all(),
[
'<Number: -1, -1.000>',
'<Number: 42, 42.000>',
'<Number: 1337, 1337.000>'
],
['<Number: -1, -1.000>', '<Number: 42, 42.000>', '<Number: 1337, 1337.000>'],
ordered=False
)
@ -886,18 +846,10 @@ class ExpressionsNumericTests(TestCase):
"""
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.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>'
],
['<Number: -1, -1.000>', '<Number: 43, 42.000>', '<Number: 1338, 1337.000>'],
ordered=False
)
@ -906,16 +858,10 @@ class ExpressionsNumericTests(TestCase):
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.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>'
],
['<Number: 43, 42.000>', '<Number: 1338, 1337.000>'],
ordered=False
)
@ -1155,8 +1101,7 @@ class FTimeDeltaTests(TestCase):
# Intentionally no assert
def test_delta_add(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
for i, delta in enumerate(self.deltas):
test_set = [e.name for e in Experiment.objects.filter(end__lt=F('start') + delta)]
self.assertEqual(test_set, self.expnames[:i])
@ -1167,8 +1112,7 @@ class FTimeDeltaTests(TestCase):
self.assertEqual(test_set, self.expnames[:i + 1])
def test_delta_subtract(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
for i, delta in enumerate(self.deltas):
test_set = [e.name for e in Experiment.objects.filter(start__gt=F('end') - delta)]
self.assertEqual(test_set, self.expnames[:i])
@ -1176,8 +1120,7 @@ class FTimeDeltaTests(TestCase):
self.assertEqual(test_set, self.expnames[:i + 1])
def test_exclude(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
for i, delta in enumerate(self.deltas):
test_set = [e.name for e in Experiment.objects.exclude(end__lt=F('start') + delta)]
self.assertEqual(test_set, self.expnames[i:])
@ -1185,8 +1128,7 @@ class FTimeDeltaTests(TestCase):
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]
for i, days in enumerate(self.days_long):
test_set = [e.name for e in Experiment.objects.filter(completed__lt=F('assigned') + days)]
self.assertEqual(test_set, self.expnames[:i])
@ -1195,8 +1137,7 @@ class FTimeDeltaTests(TestCase):
@skipUnlessDBFeature("supports_mixed_date_datetime_comparisons")
def test_mixed_comparisons1(self):
for i in range(len(self.delays)):
delay = self.delays[i]
for i, delay in enumerate(self.delays):
test_set = [e.name for e in Experiment.objects.filter(assigned__gt=F('start') - delay)]
self.assertEqual(test_set, self.expnames[:i])
@ -1204,9 +1145,8 @@ class FTimeDeltaTests(TestCase):
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]
for i, delay in enumerate(self.delays):
delay = datetime.timedelta(delay.days)
test_set = [e.name for e in Experiment.objects.filter(start__lt=F('assigned') + delay)]
self.assertEqual(test_set, self.expnames[:i])
@ -1216,8 +1156,7 @@ class FTimeDeltaTests(TestCase):
self.assertEqual(test_set, self.expnames[:i + 1])
def test_delta_update(self):
for i in range(len(self.deltas)):
delta = self.deltas[i]
for delta in self.deltas:
exps = Experiment.objects.all()
expected_durations = [e.duration() for e in exps]
expected_starts = [e.start + delta for e in exps]
@ -1416,10 +1355,8 @@ class ValueTests(TestCase):
def test_equal(self):
value = Value('name')
same_value = Value('name')
other_value = Value('username')
self.assertEqual(value, same_value)
self.assertNotEqual(value, other_value)
self.assertEqual(value, Value('name'))
self.assertNotEqual(value, Value('username'))
def test_hash(self):
d = {Value('name'): 'Bob'}