25 lines
984 B
Python
25 lines
984 B
Python
|
from django.db.models import CharField, Value
|
||
|
|
from django.db.models.functions import Length, Repeat
|
||
|
|
from django.test import TestCase
|
||
|
|
|
||
|
|
from .models import Author
|
||
|
|
|
||
|
|
|
||
|
|
class RepeatTests(TestCase):
|
||
|
|
def test_basic(self):
|
||
|
|
Author.objects.create(name='John', alias='xyz')
|
||
|
|
tests = (
|
||
|
|
(Repeat('name', 0), ''),
|
||
|
|
(Repeat('name', 2), 'JohnJohn'),
|
||
|
|
(Repeat('name', Length('alias'), output_field=CharField()), 'JohnJohnJohn'),
|
||
|
|
(Repeat(Value('x'), 3, output_field=CharField()), 'xxx'),
|
||
|
|
)
|
||
|
|
for function, repeated_text in tests:
|
||
|
|
with self.subTest(function=function):
|
||
|
|
authors = Author.objects.annotate(repeated_text=function)
|
||
|
|
self.assertQuerysetEqual(authors, [repeated_text], lambda a: a.repeated_text, ordered=False)
|
||
|
|
|
||
|
|
def test_negative_number(self):
|
||
|
|
with self.assertRaisesMessage(ValueError, "'number' must be greater or equal to 0."):
|
||
|
|
Repeat('name', -1)
|