docstr: Test calling client on an instance of ASGIProxyRequest.
  
  When the client is not passed into the scope, it returns empty string.
  When the request_type is passed into the scope, it returns the correct value.
docstr_tok: ["Test","calling","client","on","an","instance","of","ASGIProxyRequest",".","When","the","client","is","not","passed","into","the","scope",",","it","returns","empty","string",".","When","the","request_type","is","passed","into","the","scope",",","it","returns","the","correct","value","."]
code: def test_client(self):
      """Test calling client on an instance of ASGIProxyRequest.
  
      When the client is not passed into the scope, it returns empty string.
      When the request_type is passed into the scope, it returns the correct value.
      """
      proxy_request = self.create_asgi_proxy_request(scope={})
      assert isinstance(proxy_request, ProxyRequest)
      assert proxy_request.client == ""
  
      client = "fake-client"
      proxy_request = self.create_asgi_proxy_request(
          scope={"client": client}
      )
      assert isinstance(proxy_request, ProxyRequest)
      assert proxy_request.client == client
  
imports: import pickle
  from unittest.mock import MagicMock
  import pytest
  from ray.serve._private.common import StreamingHTTPRequest, gRPCRequest
  from ray.serve._private.proxy_request_response import ASGIProxyRequest, ProxyRequest, gRPCProxyRequest
  from ray.serve._private.test_utils import FakeGrpcContext
  from ray.serve.generated import serve_pb2
label_desc: Use image node_id 3 for calling the TestASGIProxyRequest obj's underlying member method code with example usage: obj.test_client() without return types