mirror of
https://github.com/django/django.git
synced 2024-11-18 07:26:04 +00:00
33 lines
1.4 KiB
Python
33 lines
1.4 KiB
Python
from django.db.models import IntegerField
|
|
from django.db.models.functions import Chr, Left, Ord
|
|
from django.test import TestCase
|
|
|
|
from .models import Author
|
|
|
|
|
|
class ChrTests(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.john = Author.objects.create(name='John Smith', alias='smithj')
|
|
cls.elena = Author.objects.create(name='Élena Jordan', alias='elena')
|
|
cls.rhonda = Author.objects.create(name='Rhonda')
|
|
|
|
def test_basic(self):
|
|
authors = Author.objects.annotate(first_initial=Left('name', 1))
|
|
self.assertCountEqual(authors.filter(first_initial=Chr(ord('J'))), [self.john])
|
|
self.assertCountEqual(authors.exclude(first_initial=Chr(ord('J'))), [self.elena, self.rhonda])
|
|
|
|
def test_non_ascii(self):
|
|
authors = Author.objects.annotate(first_initial=Left('name', 1))
|
|
self.assertCountEqual(authors.filter(first_initial=Chr(ord('É'))), [self.elena])
|
|
self.assertCountEqual(authors.exclude(first_initial=Chr(ord('É'))), [self.john, self.rhonda])
|
|
|
|
def test_transform(self):
|
|
try:
|
|
IntegerField.register_lookup(Chr)
|
|
authors = Author.objects.annotate(name_code_point=Ord('name'))
|
|
self.assertCountEqual(authors.filter(name_code_point__chr=Chr(ord('J'))), [self.john])
|
|
self.assertCountEqual(authors.exclude(name_code_point__chr=Chr(ord('J'))), [self.elena, self.rhonda])
|
|
finally:
|
|
IntegerField._unregister_lookup(Chr)
|