exceptions thrown when running app with failed unittests

[cym13 via Digitalmars-d-learn]

On Sunday, 19 March 2017 at 22:13:21 UTC, Ervin Bosenbacher wrote:
> Its my 2nd day into D, I am already in deep love (:D),  and I 
> would like to understand whether this is normal behavior or 
> something went terribly wrong, so all help is greatly 
> appreciated.
>
> [...]

Well, unittests can pass or fail and as the exception states 
there it failed. Binary search returns true if it found the 
element in the array, false otherwise. 5 is not an element of [1, 
3, 6, 7, 9, 15] so binarySearch returned false. Assert throws an 
error if its argument is false to it threw. Nothing out of the 
ordinary except maybe a broken test.