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8662654d6d
Since the original ones in django.db.models.loading were kept only for backwards compatibility, there's no need to recreate them. However, many internals of Django still relied on them. They were also imported in django.db.models. They never appear in the documentation, except a quick mention of get_models and get_app in the 1.2 release notes to document an edge case in GIS. I don't think that makes them a public API. This commit doesn't change the overall amount of global state but clarifies that it's tied to the app_cache object instead of hiding it behind half a dozen functions.
57 lines
2.2 KiB
Python
57 lines
2.2 KiB
Python
import copy
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import sys
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import unittest
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from django.apps import app_cache
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from django.core.management.validation import get_validation_errors
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from django.test.utils import override_settings
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from django.utils.six import StringIO
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class InvalidModelTestCase(unittest.TestCase):
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"""Import an appliation with invalid models and test the exceptions."""
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def setUp(self):
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# Make sure sys.stdout is not a tty so that we get errors without
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# coloring attached (makes matching the results easier). We restore
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# sys.stderr afterwards.
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self.old_stdout = sys.stdout
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self.stdout = StringIO()
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sys.stdout = self.stdout
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# This test adds dummy applications to the app cache. These
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# need to be removed in order to prevent bad interactions
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# with the flush operation in other tests.
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self.old_app_models = copy.deepcopy(app_cache.app_models)
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def tearDown(self):
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app_cache.app_models = self.old_app_models
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app_cache._get_models_cache = {}
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sys.stdout = self.old_stdout
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# Technically, this isn't an override -- TEST_SWAPPED_MODEL must be
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# set to *something* in order for the test to work. However, it's
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# easier to set this up as an override than to require every developer
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# to specify a value in their test settings.
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@override_settings(
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TEST_SWAPPED_MODEL='invalid_models.ReplacementModel',
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TEST_SWAPPED_MODEL_BAD_VALUE='not-a-model',
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TEST_SWAPPED_MODEL_BAD_MODEL='not_an_app.Target',
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)
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def test_invalid_models(self):
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try:
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module = app_cache.load_app("invalid_models.invalid_models")
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except Exception:
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self.fail('Unable to load invalid model module')
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get_validation_errors(self.stdout, module)
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self.stdout.seek(0)
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error_log = self.stdout.read()
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actual = error_log.split('\n')
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expected = module.model_errors.split('\n')
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unexpected = [err for err in actual if err not in expected]
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missing = [err for err in expected if err not in actual]
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self.assertFalse(unexpected, "Unexpected Errors: " + '\n'.join(unexpected))
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self.assertFalse(missing, "Missing Errors: " + '\n'.join(missing))
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