Prevent 3rd party lib from opening sockets in ps4 tests (#56330)

tests/components/ps4/conftest.py

@@ -1,6 +1,7 @@
 """Test configuration for PS4."""
-from unittest.mock import patch
+from unittest.mock import MagicMock, patch
 
+from pyps4_2ndscreen.ddp import DEFAULT_UDP_PORT, DDPProtocol
 import pytest
 
 
@@ -25,6 +26,19 @@ def patch_get_status():
         yield mock_get_status
 
 
+@pytest.fixture
+def mock_ddp_endpoint():
+    """Mock pyps4_2ndscreen.ddp.async_create_ddp_endpoint."""
+    protocol = DDPProtocol()
+    protocol._local_port = DEFAULT_UDP_PORT
+    protocol._transport = MagicMock()
+    with patch(
+        "homeassistant.components.ps4.async_create_ddp_endpoint",
+        return_value=(None, protocol),
+    ):
+        yield
+
+
 @pytest.fixture(autouse=True)
-def patch_io(patch_load_json, patch_save_json, patch_get_status):
+def patch_io(patch_load_json, patch_save_json, patch_get_status, mock_ddp_endpoint):
     """Prevent PS4 doing I/O."""