Initial commit

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

models/v/usermod/vip_renew_test.go

@@ -0,0 +1,47 @@
+package usermod
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRenewVIPLevel(t *testing.T) {
+	now := time.Date(2026, 8, 29, 12, 0, 0, 0, time.UTC)
+	tests := []struct {
+		name          string
+		currentExpire time.Time
+		currentLevel  int
+		renewedLevel  int
+		want          int
+	}{
+		{
+			name:          "preserves active higher level",
+			currentExpire: now.Add(24 * time.Hour),
+			currentLevel:  3,
+			renewedLevel:  1,
+			want:          3,
+		},
+		{
+			name:          "upgrades active lower level",
+			currentExpire: now.Add(24 * time.Hour),
+			currentLevel:  1,
+			renewedLevel:  3,
+			want:          3,
+		},
+		{
+			name:          "uses renewed level after expiration",
+			currentExpire: now.Add(-time.Second),
+			currentLevel:  3,
+			renewedLevel:  1,
+			want:          1,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := RenewVIPLevel(tt.currentExpire, now, tt.currentLevel, tt.renewedLevel); got != tt.want {
+				t.Fatalf("RenewVIPLevel() = %d, want %d", got, tt.want)
+			}
+		})
+	}
+}