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from django.test import SimpleTestCase
from django.utils.deconstruct import deconstructible
from django.utils.version import get_docs_version
@deconstructible()
class DeconstructibleClass:
pass
class DeconstructibleChildClass(DeconstructibleClass):
pass
@deconstructible(
path='utils_tests.deconstructible_classes.DeconstructibleWithPathClass'
)
class DeconstructibleWithPathClass:
pass
@deconstructible(
path='utils_tests.deconstructible_classes.DeconstructibleInvalidPathClass',
)
class DeconstructibleInvalidPathClass:
pass
class DeconstructibleTests(SimpleTestCase):
def test_deconstruct(self):
obj = DeconstructibleClass('arg', key='value')
path, args, kwargs = obj.deconstruct()
self.assertEqual(path, 'utils_tests.test_deconstruct.DeconstructibleClass')
self.assertEqual(args, ('arg',))
self.assertEqual(kwargs, {'key': 'value'})
def test_deconstruct_with_path(self):
obj = DeconstructibleWithPathClass('arg', key='value')
path, args, kwargs = obj.deconstruct()
self.assertEqual(
path,
'utils_tests.deconstructible_classes.DeconstructibleWithPathClass',
)
self.assertEqual(args, ('arg',))
self.assertEqual(kwargs, {'key': 'value'})
def test_deconstruct_child(self):
obj = DeconstructibleChildClass('arg', key='value')
path, args, kwargs = obj.deconstruct()
self.assertEqual(path, 'utils_tests.test_deconstruct.DeconstructibleChildClass')
self.assertEqual(args, ('arg',))
self.assertEqual(kwargs, {'key': 'value'})
def test_invalid_path(self):
obj = DeconstructibleInvalidPathClass()
docs_version = get_docs_version()
msg = (
f'Could not find object DeconstructibleInvalidPathClass in '
f'utils_tests.deconstructible_classes.\n'
f'Please note that you cannot serialize things like inner '
f'classes. Please move the object into the main module body to '
f'use migrations.\n'
f'For more information, see '
f'https://docs.djangoproject.com/en/{docs_version}/topics/'
f'migrations/#serializing-values'
)
with self.assertRaisesMessage(ValueError, msg):
obj.deconstruct()
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