Initial commit

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

models/v/usermod/drama_expire_test.go

@@ -0,0 +1,27 @@
+package usermod
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRenewDramaExpire(t *testing.T) {
+	now := time.Date(2026, 8, 26, 12, 0, 0, 0, time.UTC)
+	tests := []struct {
+		name    string
+		current time.Time
+		days    int
+		want    time.Time
+	}{
+		{name: "starts from now", days: 30, want: now.AddDate(0, 0, 30)},
+		{name: "extends active entitlement", current: now.AddDate(0, 0, 10), days: 30, want: now.AddDate(0, 0, 40)},
+		{name: "refunds active entitlement", current: now.AddDate(0, 0, 30), days: -7, want: now.AddDate(0, 0, 23)},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := RenewDramaExpire(tt.current, now, tt.days); !got.Equal(tt.want) {
+				t.Fatalf("RenewDramaExpire() = %s, want %s", got, tt.want)
+			}
+		})
+	}
+}