Make client.Context implement gRPC ClientConn (#6342)

* Add QueryConn to client.Context

* Add integration test

* imports

* spelling

* Make client.Context implement grpc ClientConn

Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

baseapp/baseapp_test.go

@@ -1555,7 +1555,7 @@ func TestGRPCQuery(t *testing.T) {
 	grpcQueryOpt := func(bapp *BaseApp) {
 		testdata.RegisterTestServiceServer(
 			bapp.GRPCQueryRouter(),
-			testServer{},
+			testdata.TestServiceImpl{},
 		)
 	}
 

baseapp/grpcrouter_test.go

@@ -2,7 +2,6 @@ package baseapp
 
 import (
 	"context"
-	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -11,22 +10,9 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
-type testServer struct{}
-
-func (e testServer) Echo(_ context.Context, req *testdata.EchoRequest) (*testdata.EchoResponse, error) {
-	return &testdata.EchoResponse{Message: req.Message}, nil
-}
-
-func (e testServer) SayHello(_ context.Context, request *testdata.SayHelloRequest) (*testdata.SayHelloResponse, error) {
-	greeting := fmt.Sprintf("Hello %s!", request.Name)
-	return &testdata.SayHelloResponse{Greeting: greeting}, nil
-}
-
-var _ testdata.TestServiceServer = testServer{}
-
 func TestGRPCRouter(t *testing.T) {
 	qr := NewGRPCQueryRouter()
-	testdata.RegisterTestServiceServer(qr, testServer{})
+	testdata.RegisterTestServiceServer(qr, testdata.TestServiceImpl{})
 	helper := &QueryServiceTestHelper{
 		GRPCQueryRouter: qr,
 		ctx:             sdk.Context{},