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30 lines
1.0 KiB
Python
30 lines
1.0 KiB
Python
from unittest import mock
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from django.core.checks import Error
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from django.db import connections, models
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from django.test import SimpleTestCase
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from django.test.utils import isolate_apps
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def dummy_allow_migrate(db, app_label, **hints):
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# Prevent checks from being run on the 'other' database, which doesn't have
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# its check_field() method mocked in the test.
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return db == "default"
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@isolate_apps("invalid_models_tests")
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class BackendSpecificChecksTests(SimpleTestCase):
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@mock.patch("django.db.models.fields.router.allow_migrate", new=dummy_allow_migrate)
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def test_check_field(self):
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"""Test if backend specific checks are performed."""
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error = Error("an error")
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class Model(models.Model):
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field = models.IntegerField()
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field = Model._meta.get_field("field")
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with mock.patch.object(
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connections["default"].validation, "check_field", return_value=[error]
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):
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self.assertEqual(field.check(databases={"default"}), [error])
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