from __future__ import absolute_import from django.core.apps import app_cache from django.core.apps.cache import AppCache from django.db import models from django.test import TestCase from .models import TotallyNormal, SoAlternative, new_app_cache class AppCacheTests(TestCase): def test_models_py(self): """ Tests that the models in the models.py file were loaded correctly. """ self.assertEqual(app_cache.get_model("app_cache", "TotallyNormal"), TotallyNormal) self.assertEqual(app_cache.get_model("app_cache", "SoAlternative"), None) self.assertEqual(new_app_cache.get_model("app_cache", "TotallyNormal"), None) self.assertEqual(new_app_cache.get_model("app_cache", "SoAlternative"), SoAlternative) def test_dynamic_load(self): """ Makes a new model at runtime and ensures it goes into the right place. """ old_models = app_cache.get_models(app_cache.get_app_config("app_cache").models_module) # Construct a new model in a new app cache body = {} new_app_cache = AppCache() meta_contents = { 'app_label': "app_cache", 'app_cache': new_app_cache, } meta = type("Meta", tuple(), meta_contents) body['Meta'] = meta body['__module__'] = TotallyNormal.__module__ temp_model = type("SouthPonies", (models.Model,), body) # Make sure it appeared in the right place! self.assertEqual( old_models, app_cache.get_models(app_cache.get_app_config("app_cache").models_module), ) self.assertEqual(new_app_cache.get_model("app_cache", "SouthPonies"), temp_model) def test_singleton_master(self): """ Ensures that only one master app cache can exist. """ with self.assertRaises(RuntimeError): AppCache(master=True)