Handle non-string src search queries (#1646)

tests/test_src_search_query_nonstring.py

@@ -0,0 +1,33 @@
+import importlib.machinery
+import importlib.util
+from pathlib import Path
+
+
+_PATH = Path(__file__).resolve().parents[1] / "src" / "search" / "query.py"
+
+
+def _load():
+    loader = importlib.machinery.SourceFileLoader("odysseus_src_search_query", str(_PATH))
+    spec = importlib.util.spec_from_loader(loader.name, loader)
+    module = importlib.util.module_from_spec(spec)
+    loader.exec_module(module)
+    return module
+
+
+def test_src_search_helpers_handle_non_string_queries():
+    q = _load()
+
+    assert q._detect_question_type(None) is None
+    assert q._split_multi_part(None) == []
+    assert q._extract_site_filter(None) == ("", None)
+    assert q._is_news_query(None) is False
+    assert isinstance(q.enhance_query(None)[0], str)
+    assert isinstance(q.build_enhanced_query(123), str)
+
+
+def test_src_search_valid_query_still_works():
+    q = _load()
+
+    assert q._detect_question_type("who is bob") == "who"
+    assert q._is_news_query("latest news today") is True
+    assert q._extract_site_filter("cats site:x.com")[1] == "x.com"