Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/server/middleware/client_request_id_test.go

@@ -0,0 +1,68 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/require"
+)
+
+func TestClientRequestIDGeneratesAndExposesID(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.Use(ClientRequestID())
+	router.GET("/", func(c *gin.Context) {
+		value, _ := c.Request.Context().Value(ctxkey.ClientRequestID).(string)
+		c.String(http.StatusOK, value)
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	w := httptest.NewRecorder()
+
+	router.ServeHTTP(w, req)
+
+	require.Equal(t, http.StatusOK, w.Code)
+	require.NotEmpty(t, w.Body.String())
+	require.Equal(t, w.Body.String(), w.Header().Get(clientRequestIDHeader))
+}
+
+func TestClientRequestIDBoundsExistingContextID(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.Use(ClientRequestID())
+	router.GET("/", func(c *gin.Context) {
+		value, _ := c.Request.Context().Value(ctxkey.ClientRequestID).(string)
+		c.String(http.StatusOK, value)
+	})
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	req = req.WithContext(context.WithValue(req.Context(), ctxkey.ClientRequestID, strings.Repeat("x", 200)))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	require.Len(t, w.Body.String(), 36)
+	require.NotEqual(t, strings.Repeat("x", maxPersistentRequestIDBytes), w.Body.String())
+	require.Equal(t, w.Body.String(), w.Header().Get(clientRequestIDHeader))
+}
+
+func TestClientRequestIDPreservesExistingContextID(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.Use(ClientRequestID())
+	router.GET("/", func(c *gin.Context) {
+		value, _ := c.Request.Context().Value(ctxkey.ClientRequestID).(string)
+		c.String(http.StatusOK, value)
+	})
+
+	w := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	req = req.WithContext(context.WithValue(req.Context(), ctxkey.ClientRequestID, "existing-client-request-id"))
+	router.ServeHTTP(w, req)
+
+	require.Equal(t, http.StatusOK, w.Code)
+	require.Equal(t, "existing-client-request-id", w.Body.String())
+	require.Equal(t, "existing-client-request-id", w.Header().Get(clientRequestIDHeader))
+}