--uds option for binding to Unix domain socket, closes #1388

tests/test_cli_serve_server.py

@@ -1,5 +1,6 @@
 import httpx
 import pytest
+import socket
 
 
 @pytest.mark.serial
@@ -21,3 +22,17 @@ def test_serve_localhost_https(ds_localhost_https_server):
         "path": "/_memory",
         "tables": [],
     }.items() <= response.json().items()
+
+
+@pytest.mark.serial
+@pytest.mark.skipif(not hasattr(socket, "AF_UNIX"), reason="Requires socket.AF_UNIX support")
+def test_serve_unix_domain_socket(ds_unix_domain_socket_server):
+    _, uds = ds_unix_domain_socket_server
+    transport = httpx.HTTPTransport(uds=uds)
+    client = httpx.Client(transport=transport)
+    response = client.get("http://localhost/_memory.json")
+    assert {
+        "database": "_memory",
+        "path": "/_memory",
+        "tables": [],
+    }.items() <= response.json().items()