mirror of https://github.com/django/django.git
55 lines
2.2 KiB
Python
55 lines
2.2 KiB
Python
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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# The models need to be removed after the test in order to prevent bad
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# interactions with the flush operation in other tests.
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self._old_models = app_cache.app_configs['invalid_models'].models.copy()
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def tearDown(self):
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app_cache.app_configs['invalid_models'].models = self._old_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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