Allow configuring SIP port in VoIP (#92210)

Co-authored-by: Franck Nijhof <git@frenck.dev>

tests/components/voip/test_sip.py

@@ -0,0 +1,55 @@
+"""Test SIP server."""
+import socket
+
+import pytest
+
+from homeassistant import config_entries
+from homeassistant.components import voip
+from homeassistant.core import HomeAssistant
+
+
+async def test_create_sip_server(hass: HomeAssistant, socket_enabled) -> None:
+    """Tests starting/stopping SIP server."""
+    result = await hass.config_entries.flow.async_init(
+        voip.DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {},
+    )
+    entry = result["result"]
+    await hass.async_block_till_done()
+
+    with pytest.raises(OSError), socket.socket(
+        socket.AF_INET, socket.SOCK_DGRAM
+    ) as sock:
+        # Server should have the port
+        sock.bind(("127.0.0.1", 5060))
+
+    # Configure different port
+    result = await hass.config_entries.options.async_init(
+        entry.entry_id,
+    )
+    result = await hass.config_entries.options.async_configure(
+        result["flow_id"],
+        user_input={"sip_port": 5061},
+    )
+    await hass.async_block_till_done()
+
+    # Server should be stopped now on 5060
+    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
+        sock.bind(("127.0.0.1", 5060))
+
+    with pytest.raises(OSError), socket.socket(
+        socket.AF_INET, socket.SOCK_DGRAM
+    ) as sock:
+        # Server should now have the new port
+        sock.bind(("127.0.0.1", 5061))
+
+    # Shut down
+    await hass.config_entries.async_remove(entry.entry_id)
+    await hass.async_block_till_done()
+
+    # Server should be stopped
+    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
+        sock.bind(("127.0.0.1", 5061))