31 lines
1.2 KiB
Python
31 lines
1.2 KiB
Python
from django.db import IntegrityError, models
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from django.test import TestCase, skipUnlessDBFeature
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from .models import Product
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class CheckConstraintTests(TestCase):
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def test_repr(self):
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constraint = models.Q(price__gt=models.F('discounted_price'))
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name = 'price_gt_discounted_price'
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check = models.CheckConstraint(constraint, name)
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self.assertEqual(
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repr(check),
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"<CheckConstraint: constraint='{}' name='{}'>".format(constraint, name),
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)
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def test_deconstruction(self):
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constraint = models.Q(price__gt=models.F('discounted_price'))
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name = 'price_gt_discounted_price'
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check = models.CheckConstraint(constraint, name)
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path, args, kwargs = check.deconstruct()
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self.assertEqual(path, 'django.db.models.CheckConstraint')
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self.assertEqual(args, ())
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self.assertEqual(kwargs, {'constraint': constraint, 'name': name})
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@skipUnlessDBFeature('supports_table_check_constraints')
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def test_model_constraint(self):
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Product.objects.create(name='Valid', price=10, discounted_price=5)
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with self.assertRaises(IntegrityError):
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Product.objects.create(name='Invalid', price=10, discounted_price=20)
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