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c03f39bc80
Ensure app label case is preserved when resolving relations to prevent migration errors with mixed-case app names. Fixes issue where makemigrations fails if INSTALLED_APPS contains app names with uppercase letters.
88 lines
3.4 KiB
Python
88 lines
3.4 KiB
Python
"""
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Tests for migration utility functions.
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"""
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from django.db.migrations.operations.utils import resolve_relation
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from django.test import SimpleTestCase
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class ResolveRelationTests(SimpleTestCase):
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"""
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Tests for the resolve_relation utility function.
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"""
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def test_resolve_relation_with_mixed_case_app_label(self):
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"""
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Test that resolve_relation preserves the case of app labels when
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splitting 'app_label.ModelName' strings. This is a regression test
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for a bug where mixed-case app names like 'DJ_RegLogin' were being
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incorrectly lowercased to 'dj_reglogin'.
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See: https://code.djangoproject.com/ticket/XXXXX
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"""
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# Test with mixed-case app label
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app_label, model_name = resolve_relation('DJ_RegLogin.Category')
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self.assertEqual(app_label, 'DJ_RegLogin')
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self.assertEqual(model_name, 'category')
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# Test with another mixed-case app label
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app_label, model_name = resolve_relation('MyApp.Model')
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self.assertEqual(app_label, 'MyApp')
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self.assertEqual(model_name, 'model')
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def test_resolve_relation_with_lowercase_app_label(self):
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"""
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Test that resolve_relation still works correctly with lowercase app labels.
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"""
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app_label, model_name = resolve_relation('myapp.MyModel')
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self.assertEqual(app_label, 'myapp')
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self.assertEqual(model_name, 'mymodel')
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def test_resolve_relation_without_dot(self):
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"""
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Test that resolve_relation works with unscoped model references
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when app_label is provided.
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"""
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app_label, model_name = resolve_relation('Category', 'DJ_RegLogin')
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self.assertEqual(app_label, 'DJ_RegLogin')
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self.assertEqual(model_name, 'category')
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def test_resolve_relation_without_dot_missing_app_label(self):
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"""
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Test that resolve_relation raises TypeError when app_label is not
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provided for unscoped model references.
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"""
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with self.assertRaises(TypeError) as cm:
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resolve_relation('Category')
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self.assertIn('app_label must be provided', str(cm.exception))
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def test_resolve_relation_recursive(self):
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"""
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Test that resolve_relation handles recursive relationships ('self').
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"""
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app_label, model_name = resolve_relation('self', 'myapp', 'mymodel')
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self.assertEqual(app_label, 'myapp')
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self.assertEqual(model_name, 'mymodel')
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def test_resolve_relation_recursive_missing_params(self):
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"""
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Test that resolve_relation raises TypeError when app_label or
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model_name is not provided for recursive relationships.
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"""
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with self.assertRaises(TypeError) as cm:
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resolve_relation('self')
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self.assertIn('app_label and model_name must be provided', str(cm.exception))
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def test_resolve_relation_model_case_normalization(self):
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"""
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Test that model names are always lowercased, regardless of how
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they appear in the input string.
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"""
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# Model name should be lowercased
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app_label, model_name = resolve_relation('myapp.MyModel')
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self.assertEqual(model_name, 'mymodel')
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app_label, model_name = resolve_relation('MyApp.CATEGORY')
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self.assertEqual(model_name, 'category')
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# But app_label should preserve its case
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self.assertEqual(app_label, 'MyApp')
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