test/python/test_db_connection.py

   1 """
   2 Tests for specialised conenction and cursor classes.
   3 """
   4 import pytest
   5 import psycopg2
   6
   7 from nominatim.db.connection import connect, get_pg_env
   8
   9 @pytest.fixture
  10 def db(temp_db):
  11     with connect('dbname=' + temp_db) as conn:
  12         yield conn
  13
  14
  15 def test_connection_table_exists(db, table_factory):
  16     assert db.table_exists('foobar') == False
  17
  18     table_factory('foobar')
  19
  20     assert db.table_exists('foobar') == True
  21
  22
  23 def test_connection_index_exists(db, temp_db_cursor):
  24     assert db.index_exists('some_index') == False
  25
  26     temp_db_cursor.execute('CREATE TABLE foobar (id INT)')
  27     temp_db_cursor.execute('CREATE INDEX some_index ON foobar(id)')
  28
  29     assert db.index_exists('some_index') == True
  30     assert db.index_exists('some_index', table='foobar') == True
  31     assert db.index_exists('some_index', table='bar') == False
  32
  33
  34 def test_drop_table_existing(db, table_factory):
  35     table_factory('dummy')
  36     assert db.table_exists('dummy')
  37
  38     db.drop_table('dummy')
  39     assert not db.table_exists('dummy')
  40
  41
  42 def test_drop_table_non_existsing(db):
  43     db.drop_table('dfkjgjriogjigjgjrdghehtre')
  44
  45
  46 def test_drop_table_non_existing_force(db):
  47     with pytest.raises(psycopg2.ProgrammingError, match='.*does not exist.*'):
  48         db.drop_table('dfkjgjriogjigjgjrdghehtre', if_exists=False)
  49
  50 def test_connection_server_version_tuple(db):
  51     ver = db.server_version_tuple()
  52
  53     assert isinstance(ver, tuple)
  54     assert len(ver) == 2
  55     assert ver[0] > 8
  56
  57
  58 def test_connection_postgis_version_tuple(db, temp_db_cursor):
  59     temp_db_cursor.execute('CREATE EXTENSION postgis')
  60
  61     ver = db.postgis_version_tuple()
  62
  63     assert isinstance(ver, tuple)
  64     assert len(ver) == 2
  65     assert ver[0] >= 2
  66
  67
  68 def test_cursor_scalar(db, table_factory):
  69     table_factory('dummy')
  70
  71     with db.cursor() as cur:
  72         assert cur.scalar('SELECT count(*) FROM dummy') == 0
  73
  74
  75 def test_cursor_scalar_many_rows(db):
  76     with db.cursor() as cur:
  77         with pytest.raises(RuntimeError):
  78             cur.scalar('SELECT * FROM pg_tables')
  79
  80
  81 def test_cursor_scalar_no_rows(db, table_factory):
  82     table_factory('dummy')
  83
  84     with db.cursor() as cur:
  85         with pytest.raises(RuntimeError):
  86             cur.scalar('SELECT id FROM dummy')
  87
  88
  89 def test_get_pg_env_add_variable(monkeypatch):
  90     monkeypatch.delenv('PGPASSWORD', raising=False)
  91     env = get_pg_env('user=fooF')
  92
  93     assert env['PGUSER'] == 'fooF'
  94     assert 'PGPASSWORD' not in env
  95
  96
  97 def test_get_pg_env_overwrite_variable(monkeypatch):
  98     monkeypatch.setenv('PGUSER', 'some default')
  99     env = get_pg_env('user=overwriter')
 100
 101     assert env['PGUSER'] == 'overwriter'
 102
 103
 104 def test_get_pg_env_ignore_unknown():
 105     env = get_pg_env('tty=stuff', base_env={})
 106
 107     assert env == {}