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from django.db.models.fields.mixins import FieldCacheMixin
from django.test import SimpleTestCase
from django.utils.deprecation import RemovedInDjango60Warning
from django.utils.functional import cached_property
from .models import Foo
# RemovedInDjango60Warning.
class ExampleOld(FieldCacheMixin):
def get_cache_name(self):
return "example"
class Example(FieldCacheMixin):
@cached_property
def cache_name(self):
return "example"
class FieldCacheMixinTests(SimpleTestCase):
def setUp(self):
self.instance = Foo()
self.field = Example()
# RemovedInDjango60Warning: when the deprecation ends, replace with:
# def test_cache_name_not_implemented(self):
# with self.assertRaises(NotImplementedError):
# FieldCacheMixin().cache_name
def test_get_cache_name_not_implemented(self):
with self.assertRaises(NotImplementedError):
FieldCacheMixin().get_cache_name()
# RemovedInDjango60Warning.
def test_get_cache_name_deprecated(self):
msg = "Override ExampleOld.cache_name instead of get_cache_name()."
with self.assertWarnsMessage(RemovedInDjango60Warning, msg) as ctx:
result = ExampleOld().cache_name
self.assertEqual(result, "example")
self.assertEqual(ctx.filename, __file__)
def test_cache_name(self):
result = Example().cache_name
self.assertEqual(result, "example")
def test_get_cached_value_missing(self):
with self.assertRaises(KeyError):
self.field.get_cached_value(self.instance)
def test_get_cached_value_default(self):
default = object()
result = self.field.get_cached_value(self.instance, default=default)
self.assertIs(result, default)
def test_get_cached_value_after_set(self):
value = object()
self.field.set_cached_value(self.instance, value)
result = self.field.get_cached_value(self.instance)
self.assertIs(result, value)
def test_is_cached_false(self):
result = self.field.is_cached(self.instance)
self.assertFalse(result)
def test_is_cached_true(self):
self.field.set_cached_value(self.instance, 1)
result = self.field.is_cached(self.instance)
self.assertTrue(result)
def test_delete_cached_value(self):
self.field.set_cached_value(self.instance, 1)
self.field.delete_cached_value(self.instance)
result = self.field.is_cached(self.instance)
self.assertFalse(result)
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