test/python/db/test_connection.py

   1 # SPDX-License-Identifier: GPL-3.0-or-later
   2 #
   3 # This file is part of Nominatim. (https://nominatim.org)
   4 #
   5 # Copyright (C) 2024 by the Nominatim developer community.
   6 # For a full list of authors see the git log.
   7 """
   8 Tests for specialised connection and cursor classes.
   9 """
  10 import pytest
  11 import psycopg2
  12
  13 from nominatim_db.db.connection import connect, get_pg_env
  14
  15 @pytest.fixture
  16 def db(dsn):
  17     with connect(dsn) as conn:
  18         yield conn
  19
  20
  21 def test_connection_table_exists(db, table_factory):
  22     assert not db.table_exists('foobar')
  23
  24     table_factory('foobar')
  25
  26     assert db.table_exists('foobar')
  27
  28
  29 def test_has_column_no_table(db):
  30     assert not db.table_has_column('sometable', 'somecolumn')
  31
  32
  33 @pytest.mark.parametrize('name,result', [('tram', True), ('car', False)])
  34 def test_has_column(db, table_factory, name, result):
  35     table_factory('stuff', 'tram TEXT')
  36
  37     assert db.table_has_column('stuff', name) == result
  38
  39 def test_connection_index_exists(db, table_factory, temp_db_cursor):
  40     assert not db.index_exists('some_index')
  41
  42     table_factory('foobar')
  43     temp_db_cursor.execute('CREATE INDEX some_index ON foobar(id)')
  44
  45     assert db.index_exists('some_index')
  46     assert db.index_exists('some_index', table='foobar')
  47     assert not db.index_exists('some_index', table='bar')
  48
  49
  50 def test_drop_table_existing(db, table_factory):
  51     table_factory('dummy')
  52     assert db.table_exists('dummy')
  53
  54     db.drop_table('dummy')
  55     assert not db.table_exists('dummy')
  56
  57
  58 def test_drop_table_non_existsing(db):
  59     db.drop_table('dfkjgjriogjigjgjrdghehtre')
  60
  61
  62 def test_drop_table_non_existing_force(db):
  63     with pytest.raises(psycopg2.ProgrammingError, match='.*does not exist.*'):
  64         db.drop_table('dfkjgjriogjigjgjrdghehtre', if_exists=False)
  65
  66 def test_connection_server_version_tuple(db):
  67     ver = db.server_version_tuple()
  68
  69     assert isinstance(ver, tuple)
  70     assert len(ver) == 2
  71     assert ver[0] > 8
  72
  73
  74 def test_connection_postgis_version_tuple(db, temp_db_with_extensions):
  75     ver = db.postgis_version_tuple()
  76
  77     assert isinstance(ver, tuple)
  78     assert len(ver) == 2
  79     assert ver[0] >= 2
  80
  81
  82 def test_cursor_scalar(db, table_factory):
  83     table_factory('dummy')
  84
  85     with db.cursor() as cur:
  86         assert cur.scalar('SELECT count(*) FROM dummy') == 0
  87
  88
  89 def test_cursor_scalar_many_rows(db):
  90     with db.cursor() as cur:
  91         with pytest.raises(RuntimeError):
  92             cur.scalar('SELECT * FROM pg_tables')
  93
  94
  95 def test_cursor_scalar_no_rows(db, table_factory):
  96     table_factory('dummy')
  97
  98     with db.cursor() as cur:
  99         with pytest.raises(RuntimeError):
 100             cur.scalar('SELECT id FROM dummy')
 101
 102
 103 def test_get_pg_env_add_variable(monkeypatch):
 104     monkeypatch.delenv('PGPASSWORD', raising=False)
 105     env = get_pg_env('user=fooF')
 106
 107     assert env['PGUSER'] == 'fooF'
 108     assert 'PGPASSWORD' not in env
 109
 110
 111 def test_get_pg_env_overwrite_variable(monkeypatch):
 112     monkeypatch.setenv('PGUSER', 'some default')
 113     env = get_pg_env('user=overwriter')
 114
 115     assert env['PGUSER'] == 'overwriter'
 116
 117
 118 def test_get_pg_env_ignore_unknown():
 119     env = get_pg_env('client_encoding=stuff', base_env={})
 120
 121     assert env == {}