mirror of
https://github.com/element-hq/synapse.git
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53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from synapse.storage.database import make_tuple_comparison_clause
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from synapse.storage.engines import BaseDatabaseEngine
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from tests import unittest
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def _stub_db_engine(**kwargs) -> BaseDatabaseEngine:
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# returns a DatabaseEngine, circumventing the abc mechanism
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# any kwargs are set as attributes on the class before instantiating it
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t = type(
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"TestBaseDatabaseEngine",
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(BaseDatabaseEngine,),
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dict(BaseDatabaseEngine.__dict__),
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)
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# defeat the abc mechanism
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t.__abstractmethods__ = set()
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for k, v in kwargs.items():
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setattr(t, k, v)
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return t(None, None)
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class TupleComparisonClauseTestCase(unittest.TestCase):
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def test_native_tuple_comparison(self):
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db_engine = _stub_db_engine(supports_tuple_comparison=True)
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clause, args = make_tuple_comparison_clause(db_engine, [("a", 1), ("b", 2)])
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self.assertEqual(clause, "(a,b) > (?,?)")
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self.assertEqual(args, [1, 2])
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def test_emulated_tuple_comparison(self):
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db_engine = _stub_db_engine(supports_tuple_comparison=False)
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clause, args = make_tuple_comparison_clause(
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db_engine, [("a", 1), ("b", 2), ("c", 3)]
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)
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self.assertEqual(
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clause, "(a >= ? AND (a > ? OR (b >= ? AND (b > ? OR c > ?))))"
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)
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self.assertEqual(args, [1, 1, 2, 2, 3])
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