feat: image variants engine

test/migrate_idempotent_test.go

@@ -0,0 +1,23 @@
+package test
+
+import (
+	"RenewCMS/internal/infrastructure/persistence/database"
+	"testing"
+)
+
+func TestMigrateTwiceKeepsSingleImagePathIndex(t *testing.T) {
+	db := openActivityDatabase(t)
+	if err := database.Migrate(db); err != nil {
+		t.Fatalf("second migrate failed: %v", err)
+	}
+	if err := database.Migrate(db); err != nil {
+		t.Fatalf("third migrate failed: %v", err)
+	}
+	var count int64
+	if err := db.Raw("SELECT COUNT(*) FROM sqlite_master WHERE type = 'index' AND name = ?", "idx_images_path").Scan(&count).Error; err != nil {
+		t.Fatalf("index lookup failed: %v", err)
+	}
+	if count != 1 {
+		t.Fatalf("expected idx_images_path exactly once, got %d", count)
+	}
+}