From 9f80dbae12920622416cd774b6db1198965cb718 Mon Sep 17 00:00:00 2001 From: unniznd Date: Wed, 27 Aug 2025 22:05:19 +0530 Subject: [PATCH] added the testcase for StreamFailure --- tests/core/host/test_basic_host.py | 37 ++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/tests/core/host/test_basic_host.py b/tests/core/host/test_basic_host.py index ed21ad80..635f2863 100644 --- a/tests/core/host/test_basic_host.py +++ b/tests/core/host/test_basic_host.py @@ -1,3 +1,10 @@ +from unittest.mock import ( + AsyncMock, + MagicMock, +) + +import pytest + from libp2p import ( new_swarm, ) @@ -10,6 +17,9 @@ from libp2p.host.basic_host import ( from libp2p.host.defaults import ( get_default_protocols, ) +from libp2p.host.exceptions import ( + StreamFailure, +) def test_default_protocols(): @@ -22,3 +32,30 @@ def test_default_protocols(): # NOTE: comparing keys for equality as handlers may be closures that do not compare # in the way this test is concerned with assert handlers.keys() == get_default_protocols(host).keys() + + +@pytest.mark.trio +async def test_swarm_stream_handler_no_protocol_selected(monkeypatch): + key_pair = create_new_key_pair() + swarm = new_swarm(key_pair) + host = BasicHost(swarm) + + # Create a mock net_stream + net_stream = MagicMock() + net_stream.reset = AsyncMock() + net_stream.muxed_conn.peer_id = "peer-test" + + # Monkeypatch negotiate to simulate "no protocol selected" + async def fake_negotiate(comm, timeout): + return None, None + + monkeypatch.setattr(host.multiselect, "negotiate", fake_negotiate) + + # Now run the handler and expect StreamFailure + with pytest.raises( + StreamFailure, match="Failed to negotiate protocol: no protocol selected" + ): + await host._swarm_stream_handler(net_stream) + + # Ensure reset was called since negotiation failed + net_stream.reset.assert_awaited()