[cfe-dev] [check-clang][lit] can I just run my own test case in when using `make check-clang`?

[Yafei Liu via cfe-dev]

Hey Paul, if a test is unsupported on my environment, `make check-clang`
will skip it, not reporting an failure, right?

On Mon, Nov 9, 2020 at 10:56 PM Robinson, Paul <paul.robinson at sony.com>
wrote:

> There are several different kinds of tests within the project.  You might
> want to read through https://llvm.org/docs/TestingGuide.html to get an
> overview.
>
>
>
> Lit tests (at least for Clang) are generally C/C++ sources intended to be
> inputs to clang; various compiler outputs are verified, usually with the
> FileCheck tool.  These test files are not built into a bin with all the
> other tests.  You should be able to use llvm-lit.py to run either a single
> test file, or one subdirectory (e.g., `llvm-lit clang/test/Sema` will run
> all the tests in Sema).
>
>
>
> Individual lit tests can express requirements on the environment, and if
> these are not satisfied, llvm-lit will report UNSUPPORTED.
> clang/test/Frontend/plugin-attribute.cpp is probably UNSUPPORTED because
> the test file contains the line `REQUIRES: plugins, examples` and those
> dependencies are not satisfied on your system.
>
>
>
> Unit tests are cpp sources that directly call Clang or LLVM APIs in some
> way, e.g., using libTooling.  If that’s what you wrote, then you don’t want
> a lit test, you want to add your file to a unittest (or add a new
> unittest).  I think you can build the unittest programs with `make
> clang-test-depends` (that’s the correct target name for ninja, not sure
> about make).
>
>
>
> Hope this helps,
>
> --paulr
>
>
>
> *From:* cfe-dev <cfe-dev-bounces at lists.llvm.org> *On Behalf Of *Yafei Liu
> via cfe-dev
> *Sent:* Sunday, November 8, 2020 10:19 PM
> *To:* Clang Dev <cfe-dev at lists.llvm.org>
> *Subject:* Re: [cfe-dev] [check-clang][lit] can I just run my own test
> case in when using `make check-clang`?
>
>
>
> Weird thing is that if I run ./bin/llvm-lit -v
> ./tools/clang/test/Sema/asm.c, it works
>
>
>
> But if I run ./bin/llvm-lit -v
> ./tools/clang/test/Frontend/plugin-attribute.cpp it says
>
> UNSUPPORTED: Clang :: Frontend/plugin-attribute.cpp (1 of 1)
>
>
>
>
>
> On Mon, Nov 9, 2020 at 11:05 AM Yafei Liu <yfliu at mobvoi.com> wrote:
>
> I worte a reguation test and want to check if my code works, but it seems
> that I have to run `make check-clang`, and it will run all the tests
> belongs to check-clang, which takes a lot of times.
>
>
>
> Since the test case is a cpp file and build into a bin with other tests
> (correct if I'm wrong), I can't use things like llvm-lit
> llvm-project/clang/test/Frontend/mytest.cpp
>
>
>
> So anyway I can run "mytest" singlely?
>
>
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