What is the D plan's to become a used language?

[Ary Borenszweig via Digitalmars-d]

On 12/23/14, 2:08 PM, Adam D. Ruppe wrote:
> On Tuesday, 23 December 2014 at 17:01:13 UTC, Russel Winder via
> Digitalmars-d wrote:
>> If there was a way of mocking
>> (so that you can run integration tests without the actual network)
>
> With my cgi.d, I made a command line interface that triggers the library
> the same as a network does. This works even if you compile it with the
> embedded http server:
>
> $ ./hellocgi  GET / foo=bar
> Cache-Control: private, no-cache="set-cookie"
> Expires: 0
> Pragma: no-cache
> Content-Type: text/html; charset=utf-8
>
> hello
>
>
> It was really easy for me to implement and it gives easy access to any
> function for testing and debugging. It also lets me use the shell as a
> kind of web console too.
>
> This is something that often amazes me that everyone doesn't do.

This looks interesting.

How do you specify what the mock should respond?