test: cover migration 41 index recovery

Author: cropflre

internal/store/migrate_group_shelf_series_recovery_test.go

@@ -0,0 +1,45 @@
+package store
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestMigration41RepairsIndexesBeforeBackfill(t *testing.T) {
+	var migration *Migration
+	for i := range Migrations {
+		if Migrations[i].Version == 41 {
+			migration = &Migrations[i]
+			break
+		}
+	}
+	if migration == nil {
+		t.Fatal("migration 41 not found")
+	}
+
+	statements := splitSQL(migration.SQL)
+	if len(statements) < 5 {
+		t.Fatalf("migration 41 has too few statements: %d", len(statements))
+	}
+
+	reindexAt := -1
+	backfillAt := -1
+	for i, stmt := range statements {
+		upper := strings.ToUpper(strings.TrimSpace(stmt))
+		if upper == "REINDEX" {
+			reindexAt = i
+		}
+		if strings.Contains(upper, `UPDATE "COMICGROUP" SET "SHELFSORTTITLE"`) {
+			backfillAt = i
+		}
+	}
+	if reindexAt < 0 {
+		t.Fatal("migration 41 must REINDEX before touching existing ComicGroup rows")
+	}
+	if backfillAt < 0 {
+		t.Fatal("migration 41 backfill statement not found")
+	}
+	if reindexAt > backfillAt {
+		t.Fatalf("REINDEX must run before shelfSortTitle backfill: reindex=%d backfill=%d", reindexAt, backfillAt)
+	}
+}