add combo test example

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

server/combo/mhpb/proto_micro.pb.go

@@ -0,0 +1,37 @@
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-micro v3.10.2
+// - protoc              v3.21.12
+// source: proto.proto
+
+package pb
+
+import (
+	context "context"
+	v3 "go.unistack.org/micro-server-http/v3"
+	proto "go.unistack.org/micro-tests/server/combo/proto"
+	client "go.unistack.org/micro/v3/client"
+)
+
+var (
+	TestName = "Test"
+)
+var (
+	TestServerEndpoints = []v3.EndpointMetadata{
+		{
+			Name:   "Test.Call",
+			Path:   "/Call",
+			Method: "POST",
+			Body:   "*",
+			Stream: false,
+		},
+	}
+)
+
+type TestClient interface {
+	Call(ctx context.Context, req *proto.CallReq, opts ...client.CallOption) (*proto.CallRsp, error)
+}
+
+type TestServer interface {
+	Call(ctx context.Context, req *proto.CallReq, rsp *proto.CallRsp) error
+}