feat: add --parallel-chunk-size option

[mRoca]

Behat handles multiple paths as argument since Behat/Behat#1611

By implementing it in this extension, we can re-use the same bootstrapped behat kernel for many tests at once, while keeping the parallelization. On projects with a big starting overhead, we can accelerate tests a lot.

I've tested my branch on a project with 205 feature files and options --parallel-feature 6 with and without --parallel-chunk-size 10: 42s -> 32s (~25% faster).

And thank you very much for this nice project !

Some remarks about this PR and the project

PHP version

While Behat does not support php <= 8.1, this project still allows php 7.2. I've kept the old not-typed syntaxe.

--rerun and features

Even if the README says that --rerun is not available for --parallel-feature, it seems to be fully working on my branch (and in features/chunk-size.feature)

Missing qa tools

phpunit & behat tests are 100% passing on this branch, but there are some issues on the main branch with phpcs & phpstan :

• phpcs / phpstan dev dependencies are not in the composer.json file but only in the .github workflow file
• if I run them locally on the master branch, phpstan find 24 errors and phpcs 3 errors
• Github actions are not running anymore because ubuntu-20.04 is not available anymore for github actions

[Daniel-Marynicz]

Thank you for this contribution.
I do not have time for this project. Probably phpcs / phpstan i will remove from the workflow.

[mRoca]

Thank you for this contribution. I do not have time for this project. Probably phpcs / phpstan i will remove from the workflow.

I can create another PR to fix phpstan / phpcs and the CI if you want

[Daniel-Marynicz]

You can remove phpstan/phpcs and addd to workflow tests current php versions , update ubuntu version.

[Daniel-Marynicz]

and when will be ready then i run workflow tests this in github action. Thank you.

[Daniel-Marynicz]

and please add current symfony version to the tests matrix

[Daniel-Marynicz]

Please resolve conflicts.

[mRoca]

Please resolve conflicts.

I know, you've just merged my first PR, give me 2 secs :-)

I'll have to disable the chunk feature for old behat versions that do not support it