syntax = "proto3";

package test_harness;

message UnaryRequest {
  int32 a = 1;
  int32 b = 2;
}

message ValueResponse { int32 value = 1; }

message ValueRequest { int32 value = 1; }

service TestHarness {
  rpc Unary(UnaryRequest) returns (ValueResponse);

  rpc ClientStreaming(stream ValueRequest) returns (ValueResponse);

  rpc ServerStreaming(ValueRequest) returns (stream ValueResponse);

  rpc BidirectionalStreaming(stream ValueRequest)
      returns (stream ValueResponse);

  rpc UnaryMetadata(UnaryRequest) returns (ValueResponse);
}