ci: run c++ tests in an integration build

[ianna]

Description of new feature

There are four c++ tests in tests-cpp that are built, but not run. They require C++17.

Tasks

Beta Give feedback

1. test: sort headers in ArrayBuilder.h #2978
   +0
2. test: sort headers in GrowableBuffer.h #2976
   +0
3. fix: use std::tuple_element_t as an OptionType type alias #2977
   +0

[jpivarski]

Is this still true? It's an old issue, and the testing situation may have changed.

If the issue is no longer relevant, please close the issue. Thanks!

[ianna]

Is this still true? It's an old issue, and the testing situation may have changed.

If the issue is no longer relevant, please close the issue. Thanks!

I think, the issue is still relevant. Only 3 out of four tests are run:

Run import os
  import os
  import pathlib
  import subprocess
  for path in pathlib.Path("build/tests/bin").glob("test_*"):
      if path.is_file():
          print(f"Running {path.name}", flush=True)
          print("::group::Test output", flush=True)
          subprocess.run([path], check=True)
          print("::endgroup::", flush=True)
  shell: /usr/bin/python3 {0}
Running test_1560-builder-options
Test output
Running test_1542-growable-buffer
Test output
Running test_1494-layout-builder
Test output

I understand, that the array builder test is not a header-only test - it needs to be linked to libawkward.so. Also, we need to check that the dependencies are propagated. For example, changes to the header-only should trigger rebuilding and testing of the array builder:

awkward/awkward-cpp/include/awkward/builder/ArrayBuilder.h

Line 12 in f9a29ef

#include "awkward/BuilderOptions.h"

Tested in #2976, #2977, and #2978

[jpivarski]

I don't think we need a C++ test for ArrayBuilder; it's tested well enough in both Python and Numba. We could just delete that one: header-only/tests/test_1542-array-builder.cpp. I just took a look at it, and it doesn't do very much, anyway.

Then we're testing everything (3 out of a total of 3), right? If so, this issue could be considered resolved once test_1542-array-builder.cpp is deleted.