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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
class DeconstructibleWithPathChildClass(DeconstructibleWithPathClass):
pass
@deconstructible(
path="utils_tests.deconstructible_classes.DeconstructibleInvalidPathClass",
)
class DeconstructibleInvalidPathClass:
pass
class DeconstructibleInvalidPathChildClass(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_deconstruct_child_with_path(self):
obj = DeconstructibleWithPathChildClass("arg", key="value")
path, args, kwargs = obj.deconstruct()
self.assertEqual(
path,
"utils_tests.test_deconstruct.DeconstructibleWithPathChildClass",
)
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()
def test_parent_invalid_path(self):
obj = DeconstructibleInvalidPathChildClass("arg", key="value")
path, args, kwargs = obj.deconstruct()
self.assertEqual(
path,
"utils_tests.test_deconstruct.DeconstructibleInvalidPathChildClass",
)
self.assertEqual(args, ("arg",))
self.assertEqual(kwargs, {"key": "value"})
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