diff --git a/jsonrpc/jsonrpc.go b/jsonrpc/jsonrpc.go
index 389dd15..2a52257 100644
--- a/jsonrpc/jsonrpc.go
+++ b/jsonrpc/jsonrpc.go
@@ -1,3 +1,16 @@
 // +build !solution
 
 package jsonrpc
+
+import (
+	"context"
+	"net/http"
+)
+
+func MakeHandler(service interface{}) http.Handler {
+	panic("implement me")
+}
+
+func Call(ctx context.Context, endpoint string, method string, req, rsp interface{}) error {
+	panic("implement me")
+}
diff --git a/jsonrpc/jsonrpc_test.go b/jsonrpc/jsonrpc_test.go
index 29a4d6a..df7c74e 100644
--- a/jsonrpc/jsonrpc_test.go
+++ b/jsonrpc/jsonrpc_test.go
@@ -1 +1,70 @@
 package jsonrpc
+
+import (
+	"context"
+	"fmt"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+type testService struct{}
+
+type PingRequest struct{}
+type PingResponse struct{}
+
+func (*testService) Ping(ctx context.Context, req *PingRequest) (*PingResponse, error) {
+	return &PingResponse{}, nil
+}
+
+type AddRequest struct{ A, B int }
+type AddResponse struct{ Sum int }
+
+func (*testService) Add(ctx context.Context, req *AddRequest) (*AddResponse, error) {
+	return &AddResponse{Sum: req.A + req.B}, nil
+}
+
+type ErrorRequest struct{}
+type ErrorResponse struct{}
+
+func (*testService) Error(ctx context.Context, req *ErrorRequest) (*ErrorResponse, error) {
+	return nil, fmt.Errorf("cache is empty")
+}
+
+func TestJSONRPC(t *testing.T) {
+	server := httptest.NewServer(MakeHandler(&testService{}))
+	defer server.Close()
+
+	ctx := context.Background()
+
+	t.Run("Ping", func(t *testing.T) {
+		var (
+			req PingRequest
+			rsp PingResponse
+		)
+
+		require.NoError(t, Call(ctx, server.URL, "Ping", &req, &rsp))
+	})
+
+	t.Run("Add", func(t *testing.T) {
+		var (
+			req = AddRequest{A: 1, B: 2}
+			rsp AddResponse
+		)
+
+		require.NoError(t, Call(ctx, server.URL, "Add", &req, &rsp))
+		require.Equal(t, 3, rsp.Sum)
+	})
+
+	t.Run("Error", func(t *testing.T) {
+		var (
+			req ErrorRequest
+			rsp ErrorResponse
+		)
+
+		err := Call(ctx, server.URL, "Error", &req, &rsp)
+		require.Error(t, err)
+		require.Contains(t, err.Error(), "cache is empty")
+	})
+}