HI, we are building a multi-tenant application, which will support that each tenant can have a unique top level domain, the application is build using the asp.net 3.5 and SQL servr 2005, while each tenant will have different database.

I have seen a number of questions about the similar applications on the StackOverFlow, but none of them is related to the Testing, I want to know is how one can test the application in a development environment, specially

1. How can we test that each customer connects to his own DB based on the URL.
2. how can we emulate different domains on the local system. like abc.com and xyz.com all goes to dev machine's IIS.

Any recommendations which might help us in the developing process of such an application.