Test for connecting to MySQL

lolafect/connections.py

@@ -101,7 +101,7 @@ def open_ssh_tunnel_with_s3_pkey(
     remote_target_host: str,
     remote_target_port: int,
     local_bind_host: str = "127.0.0.1",
-    local_bind_port: int = 12345
+    local_bind_port: int = 12345,
 ) -> SSHTunnelForwarder:
     """
     Temporarily fetch a ssh key from S3 and then proceed to open a SSH tunnel
@@ -164,7 +164,7 @@ def open_ssh_tunnel(
     """
 
     tunnel = SSHTunnelForwarder(
-        ssh_host=(
+        ssh_address_or_host=(
             ssh_tunnel_credentials["ssh_jumphost"],
             ssh_tunnel_credentials["ssh_port"],
         ),
@@ -246,22 +246,22 @@ def connect_to_mysql(
 
 
 @task(trigger=all_finished)
-def close_mysql_connection(dw_connection: pymysql.Connection) -> None:
+def close_mysql_connection(connection: pymysql.Connection) -> None:
     logger = prefect.context.get("logger")
 
-    if isinstance(dw_connection, pymysql.Connection):
-        dw_connection.close()
+    if isinstance(connection, pymysql.Connection):
+        connection.close()
         logger.info("DW connection closed successfully.")
         return
     logger.info("No connection received.")
 
 
 @task(trigger=all_finished)
-def close_ssh_tunnel(ssh_tunnel: SSHTunnelForwarder) -> None:
+def close_ssh_tunnel(tunnel: SSHTunnelForwarder) -> None:
     logger = prefect.context.get("logger")
 
-    if isinstance(ssh_tunnel, SSHTunnelForwarder):
-        ssh_tunnel.stop()
+    if isinstance(tunnel, SSHTunnelForwarder):
+        tunnel.stop()
         logger.info("SSH tunnel closed successfully.")
         return
     logger.info("No connection received.")

tests/test_integration/test_connections.py

@@ -10,6 +10,8 @@ from lolafect.connections import (
     open_ssh_tunnel_with_s3_pkey,
     get_local_bind_address_from_ssh_tunnel,
     close_ssh_tunnel,
+    connect_to_mysql,
+    close_mysql_connection,
 )
 
 # __          __     _____  _   _ _____ _   _  _____ _
@@ -115,3 +117,36 @@ def test_opening_and_closing_ssh_tunnel_works_properly():
         and local_bind_host_matches
         and local_bind_port_matches
     )
+
+
+def test_connect_query_and_disconnect_from_mysql_with_tunnel():
+
+    test_local_bind_host = "127.0.0.1"
+    test_local_bind_port = 12345
+
+    tunnel = open_ssh_tunnel_with_s3_pkey.run(
+        s3_bucket_name=TEST_LOLACONFIG.S3_BUCKET_NAME,
+        ssh_tunnel_credentials=TEST_LOLACONFIG.SSH_TUNNEL_CREDENTIALS,
+        remote_target_host=TEST_LOLACONFIG.DW_CREDENTIALS["host"],
+        remote_target_port=TEST_LOLACONFIG.DW_CREDENTIALS["port"],
+        local_bind_host=test_local_bind_host,
+        local_bind_port=test_local_bind_port,
+    )
+
+    connection = connect_to_mysql.run(
+        mysql_credentials=TEST_LOLACONFIG.DW_CREDENTIALS,
+        overriding_host_and_port=get_local_bind_address_from_ssh_tunnel.run(
+            tunnel=tunnel
+        ),
+    )
+
+    connection_was_open = connection.open
+
+    connection.cursor().execute("SELECT 1")
+
+    close_mysql_connection.run(connection=connection)
+    close_ssh_tunnel.run(tunnel=tunnel)
+
+    connection_is_closed = not connection.open
+
+    assert connection_was_open and connection_is_closed