refactor(*): 平台架构 - 拆分后端领域模块并同步插件协议与模型能力

backend/internal/app/registration_limits_test.go

@@ -0,0 +1,26 @@
+package app
+
+import (
+	"context"
+	"infinite-canvas/backend/internal/platform"
+	"testing"
+	"time"
+)
+
+func TestRequestRetryAfterMatchesWindow(t *testing.T) {
+	s := &Service{coordinator: platform.NewCoordinatorWithRedis(nil, "registration-test")}
+	ctx := context.Background()
+	if ok, err := s.AllowRequest(ctx, "email-code:test", 1, time.Hour); err != nil || !ok {
+		t.Fatal(err)
+	}
+	if ok, _ := s.AllowRequest(ctx, "email-code:test", 1, time.Hour); ok {
+		t.Fatal("limit bypassed")
+	}
+	wait := s.RequestRetryAfter(ctx, "email-code:test", time.Hour)
+	if wait < 59*time.Minute || wait > time.Hour {
+		t.Fatalf("wrong wait: %v", wait)
+	}
+	if s.coordinator.LocalRateCount() != 1 {
+		t.Fatal("rejection consumed quota")
+	}
+}