package testutil

import (
	"database/sql"
	"os"
	"testing"

	_ "github.com/go-sql-driver/mysql"
)

// OpenTestDB opens the isolated MySQL database configured for integration tests.
func OpenTestDB(t *testing.T) *sql.DB {
	t.Helper()
	dsn := os.Getenv("TEST_DB_DSN")
	if dsn == "" {
		t.Skip("TEST_DB_DSN is not configured")
	}
	db, err := sql.Open("mysql", dsn)
	if err != nil {
		t.Fatalf("open test database: %v", err)
	}
	if err := db.Ping(); err != nil {
		db.Close()
		t.Fatalf("connect test database: %v", err)
	}
	t.Cleanup(func() { db.Close() })
	return db
}