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from django.test import TestCase
from .models import Person
class ChoicesTests(TestCase):
def test_display(self):
a = Person.objects.create(name='Adrian', gender='M')
s = Person.objects.create(name='Sara', gender='F')
self.assertEqual(a.gender, 'M')
self.assertEqual(s.gender, 'F')
self.assertEqual(a.get_gender_display(), 'Male')
self.assertEqual(s.get_gender_display(), 'Female')
# If the value for the field doesn't correspond to a valid choice,
# the value itself is provided as a display value.
a.gender = ''
self.assertEqual(a.get_gender_display(), '')
a.gender = 'U'
self.assertEqual(a.get_gender_display(), 'U')
# _get_FIELD_display() coerces lazy strings.
self.assertIsInstance(a.get_gender_display(), str)
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