7.8Deadline/Timeout Testing

gRPC has built-in deadline propagation — a client can set a deadline, and if the server does not respond in time, the call fails.

def test_deadline_exceeded(user_service):
    """Request with very short deadline should fail."""
    request = user_pb2.GetUserRequest(id="123")
    with pytest.raises(grpc.RpcError) as exc_info:
        # 1 microsecond deadline — guaranteed to fail
        user_service.GetUser(request, timeout=0.000001)
    assert exc_info.value.code() == grpc.StatusCode.DEADLINE_EXCEEDED