fix: allow host tuple (#1021)

Author: lezram

asyncpg/connect_utils.py

@@ -403,7 +403,7 @@ def _parse_connect_dsn_and_args(*, dsn, host, port, user,
  host = ['/run/postgresql', '/var/run/postgresql',
  '/tmp', '/private/tmp', 'localhost']
 
- if not isinstance(host, list):
+ if not isinstance(host, (list, tuple)):
  host = [host]
 
  if auth_hosts is None:

tests/test_connect.py

@@ -671,6 +671,19 @@ class TestConnectParams(tb.TestCase):
  'target_session_attrs': 'any',
  })
  },
+ {
+ 'name': 'params_multi_host_dsn_env_mix_tuple',
+ 'env': {
+ 'PGUSER': 'foo',
+ },
+ 'dsn': 'postgresql:///db',
+ 'host': ('host1', 'host2'),
+ 'result': ([('host1', 5432), ('host2', 5432)], {
+ 'database': 'db',
+ 'user': 'foo',
+ 'target_session_attrs': 'any',
+ })
+ },
 
  {
  'name': 'params_combine_dsn_settings_override_and_ssl',