Automated tests – Karma/Webpack watcher runs tests n times

[pomek]

Fortunately, this issue was reported here – webpack/watchpack#25.

Fix for the issue is simple. The code below should be added here:

https://github.com/ckeditor/ckeditor5-dev/blob/8feba11aa6908e69141283b2b1fd5e0ea3ff68fe/packages/ckeditor5-dev-tests/lib/tasks/runautomatedtests.js#L91-L92

const now = Date.now() / 1000;
const then = now - 5;
fs.utimesSync( ENTRY_FILE_PATH, then, then );