version(assert) and Phobos release unittest build

[Gary Willoughby]

On Thursday, 28 November 2013 at 16:40:57 UTC, Dicebot wrote:
> I have quickly tested it and looks like asserts are not removed 
> from unittest blocks in release builds, only from normal code. 
> Which does not seem to be documented on dlang.org but was 
> probably introduced exactly to prevent existing tests from 
> breaking in release mode. I have just learned something new :)

I found this out too during the development of DUnit: 
https://github.com/nomad-software/dunit#notes

The asserts remain then the runtime just catches anything 
Throwable during unit test execution: 
https://github.com/D-Programming-Language/druntime/blob/master/src/core/runtime.d#L389-L419