feat: command validation

internal/router/router_helper_test.go

@@ -1,6 +1,8 @@
 package router_test
 
 import (
+	"encoding/json"
+
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 	"github.com/iliadenisov/galaxy/internal/model/rest"
@@ -24,5 +26,14 @@ func (e *dummyExecutor) GameState() (rest.StateResponse, error) {
 }
 
 func setupRouter() *gin.Engine {
+	gin.SetMode(gin.TestMode)
 	return router.SetupRouter(&dummyExecutor{})
 }
+
+func encodeCommand(cmd any) json.RawMessage {
+	v, err := json.Marshal(cmd)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}