mirror of
https://github.com/django/django.git
synced 2024-12-22 17:16:24 +00:00
50 lines
1.8 KiB
Python
50 lines
1.8 KiB
Python
from django.db.models import F, IntegerField
|
|
from django.db.models.functions import Chr, Left, Ord
|
|
from django.test import TestCase
|
|
from django.test.utils import register_lookup
|
|
|
|
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):
|
|
with register_lookup(IntegerField, 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],
|
|
)
|
|
|
|
def test_annotate(self):
|
|
authors = Author.objects.annotate(
|
|
first_initial=Left("name", 1),
|
|
initial_chr=Chr(ord("J")),
|
|
)
|
|
self.assertSequenceEqual(
|
|
authors.filter(first_initial=F("initial_chr")),
|
|
[self.john],
|
|
)
|