refactor backend packages and global db service

backend/internal/router/router_test.go

@@ -0,0 +1,41 @@
+package router
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/require"
+	"senlinai-agent/backend/internal/config"
+)
+
+func TestHealthz(t *testing.T) {
+	router := NewRouter(config.Config{Env: "test"})
+	req := httptest.NewRequest(http.MethodGet, "/healthz", nil)
+	rec := httptest.NewRecorder()
+
+	router.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.JSONEq(t, `{"status":"ok"}`, rec.Body.String())
+}
+
+func TestNewRouterRegistersFeatureRoutesUnderAPI(t *testing.T) {
+	router := NewRouter(config.Config{Env: "test"}, testRegistrar{})
+	req := httptest.NewRequest(http.MethodGet, "/api/ping", nil)
+	rec := httptest.NewRecorder()
+
+	router.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.JSONEq(t, `{"pong":true}`, rec.Body.String())
+}
+
+type testRegistrar struct{}
+
+func (testRegistrar) Register(router gin.IRouter) {
+	router.GET("/ping", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{"pong": true})
+	})
+}