new(tests): introduce a new test helper

[Andreagit97]

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

/area tests

Does this PR require a change in the driver versions?

What this PR does / why we need it:

This PR introduces a new test helper. I had this helper in an old branch and it will become really useful when sinsp won't need any more OPEN_E event to populate the state.

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[github-actions]

Perf diff from master - unit tests

    10.55%     +1.16%  [.] sinsp_parser::reset
     4.32%     -0.73%  [.] gzfile_read
     1.65%     +0.73%  [.] sinsp::fetch_next_event
     1.24%     -0.72%  [.] sinsp_evt::get_param
     1.39%     +0.72%  [.] std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release
     1.14%     -0.67%  [.] sinsp_parser::event_cleanup
     0.30%     +0.62%  [.] std::_Hashtable<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Identity, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, true, true> >::find
     1.23%     -0.57%  [.] sinsp_evt::get_syscall_return_value
     3.24%     -0.55%  [.] sinsp_thread_manager::find_thread
     5.34%     -0.54%  [.] next

Heap diff from master - unit tests

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Heap diff from master - scap file

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Benchmarks diff from master

Comparing gbench_data.json to /root/actions-runner/_work/libs/libs/build/gbench_data.json
Benchmark                                                         Time             CPU      Time Old      Time New       CPU Old       CPU New
----------------------------------------------------------------------------------------------------------------------------------------------
BM_sinsp_split_mean                                            +0.0329         +0.0329           144           149           144           149
BM_sinsp_split_median                                          +0.0356         +0.0356           143           149           143           149
BM_sinsp_split_stddev                                          -0.3633         -0.3636             2             1             2             1
BM_sinsp_split_cv                                              -0.3836         -0.3839             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  -0.0018         -0.0018            57            57            57            57
BM_sinsp_concatenate_paths_relative_path_median                -0.0022         -0.0022            57            57            57            57
BM_sinsp_concatenate_paths_relative_path_stddev                -0.2530         -0.2536             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_cv                    -0.2517         -0.2523             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     +0.0389         +0.0389            24            25            24            25
BM_sinsp_concatenate_paths_empty_path_median                   +0.0336         +0.0336            24            25            24            25
BM_sinsp_concatenate_paths_empty_path_stddev                   +4.8306         +4.8303             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       +4.6125         +4.6122             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  +0.0195         +0.0195            56            57            56            57
BM_sinsp_concatenate_paths_absolute_path_median                +0.0051         +0.0051            56            56            56            56
BM_sinsp_concatenate_paths_absolute_path_stddev                +5.0352         +5.0335             0             2             0             2
BM_sinsp_concatenate_paths_absolute_path_cv                    +4.9196         +4.9180             0             0             0             0
BM_sinsp_split_container_image_mean                            +0.0188         +0.0188           387           394           387           394
BM_sinsp_split_container_image_median                          +0.0205         +0.0205           386           394           386           394
BM_sinsp_split_container_image_stddev                          +0.2568         +0.2570             4             4             4             4
BM_sinsp_split_container_image_cv                              +0.2336         +0.2338             0             0             0             0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.16%. Comparing base (f4a7bb5) to head (247a938).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2181   +/-   ##
=======================================
  Coverage   75.16%   75.16%           
=======================================
  Files         257      257           
  Lines       33736    33736           
  Branches     5755     5755           
=======================================
  Hits        25359    25359           
  Misses       8377     8377           

Flag	Coverage Δ
libsinsp	75.16% <100.00%> (ø)

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[Andreagit97]

no idea why this is failing in build-libs-emscripten. Usually these failures are due to some missing casts but in this case i cannot see any missing cast

[FedeDP]

/approve

[poiana]

LGTM label has been added.

Git tree hash: c5e0ce2ed1ebcdcc3dc55ad6fe032ba798fe61cc

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP

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