Adding upstream version 1.2+20240521.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/mocks.py

@@ -0,0 +1,40 @@
+from typing import List
+
+from grpclib.client import Channel
+
+
+class MockChannel(Channel):
+    # noinspection PyMissingConstructor
+    def __init__(self, responses=None) -> None:
+        self.responses = responses or []
+        self.requests = []
+        self._loop = None
+
+    def request(self, route, cardinality, request, response_type, **kwargs):
+        self.requests.append(
+            {
+                "route": route,
+                "cardinality": cardinality,
+                "request": request,
+                "response_type": response_type,
+            }
+        )
+        return MockStream(self.responses)
+
+
+class MockStream:
+    def __init__(self, responses: List) -> None:
+        super().__init__()
+        self.responses = responses
+
+    async def recv_message(self):
+        return self.responses.pop(0)
+
+    async def send_message(self, *args, **kwargs):
+        pass
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb):
+        return True
+
+    async def __aenter__(self):
+        return self