GenerateMockGrpcClientWithOptionalGrpcConnectionErrors generates a mock gRPC client that mocks both Tcp and Grpc connections and optionally returns the specified errors on Grpc connections.

GenerateMockGrpcClientWithOptionalTcpConnectionErrors generates a mock gRPC client that mocks Tcp connections and optionally returns the given connection and close errors.

QueryClient combines all the query clients used in testing into a single mock interface for testing convenience.