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30 lines
1.3 KiB
Python
30 lines
1.3 KiB
Python
from unittest import skipUnless
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from django.db import connection
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from django.test import TestCase
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@skipUnless(connection.vendor == 'mysql', 'MySQL tests')
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class ParsingTests(TestCase):
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def test_parse_constraint_columns(self):
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_parse_constraint_columns = connection.introspection._parse_constraint_columns
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tests = (
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('`height` >= 0', ['height'], ['height']),
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('`cost` BETWEEN 1 AND 10', ['cost'], ['cost']),
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('`ref1` > `ref2`', ['id', 'ref1', 'ref2'], ['ref1', 'ref2']),
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(
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'`start` IS NULL OR `end` IS NULL OR `start` < `end`',
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['id', 'start', 'end'],
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['start', 'end'],
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),
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('JSON_VALID(`json_field`)', ['json_field'], ['json_field']),
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('CHAR_LENGTH(`name`) > 2', ['name'], ['name']),
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("lower(`ref1`) != 'test'", ['id', 'owe', 'ref1'], ['ref1']),
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("lower(`ref1`) != 'test'", ['id', 'lower', 'ref1'], ['ref1']),
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("`name` LIKE 'test%'", ['name'], ['name']),
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)
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for check_clause, table_columns, expected_columns in tests:
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with self.subTest(check_clause):
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check_columns = _parse_constraint_columns(check_clause, table_columns)
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self.assertEqual(list(check_columns), expected_columns)
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