Rant after trying Rust a bit

[Walter Bright via Digitalmars-d]

On 7/25/2015 3:59 PM, deadalnix wrote:
> On Saturday, 25 July 2015 at 12:05:12 UTC, Andrei Alexandrescu wrote:
>> Well at least all paths must be compiled. You wouldn't ship templates that
>> were never instantiated just as much as you wouldn't ship any code without
>> compiling it. We've had a few cases in Phobos a while ago of templates that
>> were never instantiated, with simple compilation errors when people tried to
>> use them. -- Andrei
>
> That is an instance of happy case testing. You test that what you expect to work
> work. You can't test that everything that is not supposed to work do not, or
> that you don't rely on a specific behavior of the thing you are testing.
>

Um, testing all paths is not happy case testing.