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41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
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from django.db.models import CharField
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from django.db.models.functions import LTrim, RTrim, Trim
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from django.test import TestCase
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from .models import Author
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class TrimTests(TestCase):
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def test_trim(self):
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Author.objects.create(name=' John ', alias='j')
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Author.objects.create(name='Rhonda', alias='r')
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authors = Author.objects.annotate(
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ltrim=LTrim('name'),
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rtrim=RTrim('name'),
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trim=Trim('name'),
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)
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self.assertQuerysetEqual(
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authors.order_by('alias'), [
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('John ', ' John', 'John'),
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('Rhonda', 'Rhonda', 'Rhonda'),
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],
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lambda a: (a.ltrim, a.rtrim, a.trim)
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)
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def test_trim_transform(self):
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Author.objects.create(name=' John ')
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Author.objects.create(name='Rhonda')
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tests = (
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(LTrim, 'John '),
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(RTrim, ' John'),
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(Trim, 'John'),
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)
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for transform, trimmed_name in tests:
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with self.subTest(transform=transform):
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try:
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CharField.register_lookup(transform)
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authors = Author.objects.filter(**{'name__%s' % transform.lookup_name: trimmed_name})
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self.assertQuerysetEqual(authors, [' John '], lambda a: a.name)
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finally:
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CharField._unregister_lookup(transform)
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