Let's improve the dmd tester.

[Stefan Koch]

On Thursday, 25 June 2020 at 18:15:57 UTC, Seb wrote:
> On Thursday, 25 June 2020 at 14:39:18 UTC, Stefan Koch wrote:
>> [...]
>
> You do realize that you can run all tests locally?
> For example, `./test/run.d compilable` takes less than ten 
> seconds on my machine.
> You can also execute only individual tests e.g. `./test/run.d 
> compilable/dtoh_enum.d`
>
>> [...]
>
> The tester ensures that the log output of each test isn't mixed.
>
>> [...]
>
> So to summarize your "wishes":
>
> a) print error messages of failed tests at the end of the 
> execution
> BTW for local testing you can just rerun the test script. It 
> will only rerun the failing tests.
>
> b) hide messages for successful tests under the verbose flag
>
> Did I understand you correctly?

Yes that would be the first things which should be fixed.
The point is that I cannot find everything by running locally,
for example I don't have a mac. And I don't use windows for 
development.