Added close method for Connection Pool

Author: chandr-andr

python/tests/test_connection_pool.py

@@ -1,6 +1,7 @@
 import pytest
 
 from psqlpy import Connection, ConnRecyclingMethod, PSQLPool, QueryResult
+from psqlpy.exceptions import RustPSQLDriverPyBaseError
 
 pytestmark = pytest.mark.anyio
 
@@ -59,3 +60,19 @@ async def test_pool_conn_recycling_method(
     await pg_pool.startup()
 
     await pg_pool.execute("SELECT 1")
+
+
+async def test_close_connection_pool() -> None:
+    """Test that `close` method closes connection pool."""
+    pg_pool = PSQLPool(
+        dsn="postgres://postgres:postgres@localhost:5432/psqlpy_test",
+    )
+
+    await pg_pool.startup()
+
+    await pg_pool.execute("SELECT 1")
+
+    await pg_pool.close()
+
+    with pytest.raises(expected_exception=RustPSQLDriverPyBaseError):
+        await pg_pool.execute("SELECT 1")