How do I specify database in odoo Controller 

my code:

@http.route('/test/', type='http', auth='public', website=True, db='test')    

​def index(self, **kw):        

​ ​return "Salutation"

this is what I did and then if I went to localhost:8069/test/ I got 404 Not found error.
but if I go to localhost:8069/database/selector and select the database I get the right response.
How do I specify the database in odoo Controller rather than select it manually from the browser