want to use multiple database.

[eluser]Mistry007[/eluser]
hi every one. I want to use multiple database in my project. one db for the testing and another for real data. I have gone through the database config now i have set the two connection in database.php file

Code:

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = '192.168.1.99';
$db['default']['username'] = 'jignesh';
$db['default']['password'] = 'pass';
$db['default']['database'] = 'xit_product';
$db['default']['dbdriver'] = 'mysqli';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;
$db['default']['save_queries'] = TRUE;




$db['default']['hostname'] = '192.168.1.99';
$db['default']['username'] = 'jignesh';
$db['default']['password'] = 'pass';
$db['default']['database'] = 'xit_product_test';
$db['default']['dbdriver'] = 'mysqli';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = FALSE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;
$db['default']['save_queries'] = TRUE;

Now i want to use it like if i run my test controller then it should take "xit_product_test" database. and if i run another controller then it will took the default database. now i have a little bit confustion for testing i have implemented unit testing
which check the model functions.
Do i have to change all model for multiple database.
Any help will be appriciated..
Thanks