Nominatim/test/python/tools/test_migration.py
2024-09-27 12:07:48 +02:00

77 lines
2.4 KiB
Python

# SPDX-License-Identifier: GPL-3.0-or-later
#
# This file is part of Nominatim. (https://nominatim.org)
#
# Copyright (C) 2024 by the Nominatim developer community.
# For a full list of authors see the git log.
"""
Tests for migration functions
"""
import pytest
from nominatim_db.tools import migration
from nominatim_db.errors import UsageError
from nominatim_db.db.connection import server_version_tuple
import nominatim_db.version
class DummyTokenizer:
def update_sql_functions(self, config):
pass
@pytest.fixture
def postprocess_mock(monkeypatch):
monkeypatch.setattr(migration.refresh, 'create_functions', lambda *args: args)
monkeypatch.setattr(migration.tokenizer_factory, 'get_tokenizer_for_db',
lambda *args: DummyTokenizer())
def test_no_migration_old_versions(temp_db_with_extensions, def_config, property_table):
property_table.set('database_version', '4.2.99-0')
with pytest.raises(UsageError, match='Migration not possible'):
migration.migrate(def_config, {})
def test_already_at_version(temp_db_with_extensions, def_config, property_table):
property_table.set('database_version',
str(nominatim_db.version.NOMINATIM_VERSION))
assert migration.migrate(def_config, {}) == 0
def test_run_single_migration(temp_db_with_extensions, def_config, temp_db_cursor,
property_table, monkeypatch, postprocess_mock):
oldversion = [4, 4, 99, 0]
property_table.set('database_version',
str(nominatim_db.version.NominatimVersion(*oldversion)))
done = {'old': False, 'new': False}
def _migration(**_):
""" Dummy migration"""
done['new'] = True
def _old_migration(**_):
""" Dummy migration"""
done['old'] = True
oldversion[1] = 0
monkeypatch.setattr(migration, '_MIGRATION_FUNCTIONS',
[(tuple(oldversion), _old_migration),
(nominatim_db.version.NOMINATIM_VERSION, _migration)])
assert migration.migrate(def_config, {}) == 0
assert done['new']
assert not done['old']
assert property_table.get('database_version') == str(nominatim_db.version.NOMINATIM_VERSION)
###### Tests for specific migrations
#
# Each migration should come with two tests:
# 1. Test that migration from old to new state works as expected.
# 2. Test that the migration can be rerun on the new state without side effects.