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0242c56fd8
Improved Andrew's hack to create temporary app caches to handle migrations. Now the main app cache has a "master" flag set to True (which is a non-default keyword argument, thus unlikely to be used by mistake). Other app cache instances have "master" set to False. The only sanctioned way to access the app cache is by importing django.core.apps.app_cache. If you were instanciating an app cache and relying on the Borg pattern, you'll have to refactor your code.
55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
from __future__ import absolute_import
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from django.core.apps import app_cache
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from django.core.apps.cache import AppCache
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from django.db import models
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from django.test import TestCase
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from .models import TotallyNormal, SoAlternative, new_app_cache
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class AppCacheTests(TestCase):
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"""
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Tests the AppCache borg and non-borg versions
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"""
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def test_models_py(self):
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"""
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Tests that the models in the models.py file were loaded correctly.
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"""
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self.assertEqual(app_cache.get_model("app_cache", "TotallyNormal"), TotallyNormal)
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self.assertEqual(app_cache.get_model("app_cache", "SoAlternative"), None)
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self.assertEqual(new_app_cache.get_model("app_cache", "TotallyNormal"), None)
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self.assertEqual(new_app_cache.get_model("app_cache", "SoAlternative"), SoAlternative)
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def test_dynamic_load(self):
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"""
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Makes a new model at runtime and ensures it goes into the right place.
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"""
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old_models = app_cache.get_models(app_cache.get_app_config("app_cache").models_module)
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# Construct a new model in a new app cache
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body = {}
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new_app_cache = AppCache()
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meta_contents = {
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'app_label': "app_cache",
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'app_cache': new_app_cache,
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}
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meta = type("Meta", tuple(), meta_contents)
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body['Meta'] = meta
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body['__module__'] = TotallyNormal.__module__
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temp_model = type("SouthPonies", (models.Model,), body)
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# Make sure it appeared in the right place!
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self.assertEqual(
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old_models,
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app_cache.get_models(app_cache.get_app_config("app_cache").models_module),
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)
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self.assertEqual(new_app_cache.get_model("app_cache", "SouthPonies"), temp_model)
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def test_singleton_master(self):
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"""
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Ensures that only one master app cache can exist.
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"""
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with self.assertRaises(RuntimeError):
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AppCache(master=True)
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