force switch database configuration for sad CakePHP 1.1.x

database.php

/**
 * A Bad Knowhow for CakePHP 1.1.x
 * 
 * force rewriting `default' setting
 * because libs/session.php has hard-coded `default' !
 */
class DATABASE_CONFIG {
  var $default = array( 'driver'   => 'XXXXX',
                        'connect'  => 'XXXXX',
                        'host'     => 'XXXXX',
                        'login'    => 'XXXXX',
                        'password' => 'XXXXX',
                        'database' => 'XXXXX',
                        'prefix'   => 'XXXXX'
                        );

  function DATABASE_CONFIG() {
    if ( is_testing_environmont() ) {
      $this->default = array( 'driver'   => 'YYYYY',
                              'connect'  => 'YYYYY',
                              'host'     => 'YYYYY',
                              'login'    => 'YYYYY',
                              'password' => 'YYYYY',
                              'database' => 'YYYYY',
                              'prefix'   => 'YYYYY'
                              );
    }
  }
}