Assert httpx mock routes are called in transport tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: adamtheturtle

tests/test_transports.py

@@ -16,7 +16,7 @@ class TestHTTPXTransport:
     @respx.mock
     def test_float_timeout() -> None:
         """``HTTPXTransport`` works with a float timeout."""
-        respx.post(url="https://example.com/test").mock(
+        route = respx.post(url="https://example.com/test").mock(
             return_value=httpx.Response(
                 status_code=HTTPStatus.OK,
                 text="OK",
@@ -30,6 +30,7 @@ def test_float_timeout() -> None:
             data=b"hello",
             timeout=30.0,
         )
+        assert route.called
         assert isinstance(response, Response)
         assert response.status_code == HTTPStatus.OK
         assert response.text == "OK"
@@ -41,7 +42,7 @@ def test_tuple_timeout() -> None:
         """``HTTPXTransport`` works with a (connect, read) timeout
         tuple.
         """
-        respx.post(url="https://example.com/test").mock(
+        route = respx.post(url="https://example.com/test").mock(
             return_value=httpx.Response(
                 status_code=HTTPStatus.OK,
                 text="OK",
@@ -55,5 +56,6 @@ def test_tuple_timeout() -> None:
             data=b"hello",
             timeout=(5.0, 30.0),
         )
+        assert route.called
         assert isinstance(response, Response)
         assert response.status_code == HTTPStatus.OK