mirror of https://github.com/django/django.git
40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
from django.db.models.functions import Lag, Lead, NthValue, Ntile
|
|
from django.test import SimpleTestCase
|
|
|
|
|
|
class ValidationTests(SimpleTestCase):
|
|
def test_nth_negative_nth_value(self):
|
|
msg = 'NthValue requires a positive integer as for nth'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
NthValue(expression='salary', nth=-1)
|
|
|
|
def test_nth_null_expression(self):
|
|
msg = 'NthValue requires a non-null source expression'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
NthValue(expression=None)
|
|
|
|
def test_lag_negative_offset(self):
|
|
msg = 'Lag requires a positive integer for the offset'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
Lag(expression='salary', offset=-1)
|
|
|
|
def test_lead_negative_offset(self):
|
|
msg = 'Lead requires a positive integer for the offset'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
Lead(expression='salary', offset=-1)
|
|
|
|
def test_null_source_lead(self):
|
|
msg = 'Lead requires a non-null source expression'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
Lead(expression=None)
|
|
|
|
def test_null_source_lag(self):
|
|
msg = 'Lag requires a non-null source expression'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
Lag(expression=None)
|
|
|
|
def test_negative_num_buckets_ntile(self):
|
|
msg = 'num_buckets must be greater than 0'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
Ntile(num_buckets=-1)
|