Support httpx2 via httpcore2

noxfile.py

@@ -8,6 +8,8 @@
 @nox.session(python=["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"])
 def test(session):
     deps = ["pytest", "pytest-asyncio", "pytest-cov", "trio", "starlette", "flask"]
+    if tuple(map(int, session.python.split("."))) >= (3, 10):
+        deps.append("httpx2")
     session.install("--upgrade", *deps)
     session.install("-e", ".")
 

respx/mocks.py

@@ -76,6 +76,7 @@ def start(cls) -> None:
             return
 
         # Start patching target transports
+        patched = 0
         for target in cls.targets:
             for method in cls.target_methods:
                 try:
@@ -85,6 +86,13 @@ def start(cls) -> None:
                     cls._patches.append(patch)
                 except AttributeError:
                     pass
+                except ModuleNotFoundError:  # pragma: no cover
+                    pass
+                else:
+                    patched += 1
+
+        if not patched:
+            raise ModuleNotFoundError("No http tool found to patch")  # pragma: no cover
 
     @classmethod
     def stop(cls, force: bool = False) -> None:
@@ -268,6 +276,13 @@ class HTTPCoreMocker(AbstractRequestMocker):
         "httpcore._async.connection.AsyncHTTPConnection",
         "httpcore._async.connection_pool.AsyncConnectionPool",
         "httpcore._async.http_proxy.AsyncHTTPProxy",
+        # Pydantic's httpx2 fork
+        "httpcore2._sync.connection.HTTPConnection",
+        "httpcore2._sync.connection_pool.ConnectionPool",
+        "httpcore2._sync.http_proxy.HTTPProxy",
+        "httpcore2._async.connection.AsyncHTTPConnection",
+        "httpcore2._async.connection_pool.AsyncConnectionPool",
+        "httpcore2._async.http_proxy.AsyncHTTPProxy",
     ]
     target_methods = ["handle_request", "handle_async_request"]
 

tests/test_tools.py

@@ -0,0 +1,16 @@
+import sys
+
+import pytest
+
+import respx
+
+pytestmark = pytest.mark.skipif(sys.version_info < (3, 10), reason="Old python version")
+
+
+def test_httpx2_support():  # pragma: no cover
+    import httpx2  # type: ignore[import-not-found]
+
+    with respx.mock:
+        respx.get("https://example.com/httpx").respond(text="2")
+        response = httpx2.get("https://example.com/httpx")
+        assert response.text == "2"