How to do unittests

[qsdf via Digitalmars-d-learn]

On Wednesday, 30 September 2015 at 14:20:28 UTC, Namal wrote:
> On Wednesday, 30 September 2015 at 13:03:52 UTC, Rikki 
> Cattermole wrote:
>> On 01/10/15 1:59 AM, Namal wrote:
>>> Hello,
>>>
>>> can someone give me a complete example please how to do 
>>> unittests? I
>>> tried this with the example from german wikipedia, but the 
>>> flag
>>> -unittest didn't make any difference.
>>
>> Example file with loads of unittests: 
>> https://github.com/rikkimax/alphaPhobos/blob/master/source/std/experimental/uri.d
>>
>> If you were to compile it e.g. dmd uri.d it won't be much use 
>> (unittest wise). You will need to dmd -unittest uri.d to 
>> compile them in. Don't forget to do the same for your main 
>> function. When you run the final executable the tests will 
>> execute before your main function does.
>
> can't I do unittest in the main?

D unit tests are like a stack of free functions. You put them 
separatly.


when there's a main: dmd -unittest a.d
--
module a;
void main(){}

unittest{}
--


when there is no main: (like std.uri): dmd -main -unittest a.d
--
module a;
unittest{}
--

the -main switch adds a dummy main function so that the output 
can be executed.

But most of the time you'll think that nothing happens because 
the tests succeed...