I share the opinion others have expressed here that running unit tests should be the responsability of the build system.

Atila

On Saturday, 25 January 2014 at 22:55:33 UTC, Andrei Alexandrescu wrote:
There's this simple realization that unittests could (should?) be considered an intrinsic part of the build process. In order for an executable to be worth running, it should pass the regular semantic checks and also the unittests, which in a sense are extended semantic checks that fall outside the traditional charter of the compiler.

In that view, asserts inside unittests should fail with the same message format as regular compilation errors, i.e.

./modulename.d(103): Unittest failed: user-defined message

Stack traces and other artifacts printed by failing asserts should come after, indented. An IDE user should run unittest with the usual "build" command and be able to click on the unittest failures just the same as build errors.

In particular, this view of unittests declares our current stance on running unittests ("run unittests just before main()") as meaningless. Indeed that has bothered me for quite a while - unittests are part of the build/acceptance, not part of every run. To wit, this is a growing idiom in D programs:

version(unittest) void main() {}
else void main()
{
    ...
}

What do you think? Logistically it shouldn't be too hard to arrange things to cater to this approach.


Andrei

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