dmd -unittest=<pattern> (same syntax as -i)

[Steven Schveighoffer]

On 3/16/18 10:32 AM, Dejan Lekic wrote:
> On Wednesday, 14 March 2018 at 22:04:50 UTC, Adam D. Ruppe wrote:
>> On Wednesday, 14 March 2018 at 21:22:01 UTC, Timothee Cour wrote:
>>> would a PR for `dmd -unittest=<pattern> (same syntax as -i)` be welcome?
>>
>> so when this came up on irc earlier (was that you?) this was the first 
>> thought that came to my mind. I'd support it, tho I'm no decision maker.
> 
> I guess it was me talking about it two days ago on IRC...
> 
> Almost exclusively I need to run unittests only in the module I 
> currently work on and it really makes no sense to run other unittests at 
> that point of time (unless I explicitly want to). I would even go 
> further to say that we basically need to be able to run particular 
> unittest.
> 
> What I do at the moment is that I developed this kind of practice to 
> have a test_runner.d top-level module in every D project of mine that 
> contains tests I do during the development of particular feature TDD 
> style, and then once I am done, I move this code to appropriate unittest 
> blocks in my final module...
> 
> There are bunch of issues with existing support for unittests that could 
> be solved to make unit-testing a really pleasant activity.

You can do most of this via custom unit test handlers[1]. We could 
potentially add more features to unit testing in druntime, but the more 
we add, the more complex the code gets.

-Steve

[1] 
https://dlang.org/phobos/core_runtime.html#.Runtime.extendedModuleUnitTester